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• How many users are sufficient to make a heavy load for web application

  - by galymzhan

  I have a web application, which has been suffering high load recent days. The application runs on single server which has 8-core Intel CPU and 4gb of RAM. Software: Drupal 5 (Apache 2, PHP5, MySQL5) running on Debian. After reaching 500 authenticated and 200 anonymous users (simultaneous), the application drastically decreases its performance up to total failure. The biggest load comes from authenticated users, who perform activities, causing insert/update/deletes on db. I think mysql is a bottleneck. Is it normal to slow down on such number of users? EDIT: I forgot to mention that I did some kind of profiling. I runned commands top, htop and they showed me that all memory was being used by MySQL! After some time MySQL starts to perform terribly slow, site goes down, and we have to restart/stop apache to reduce load. Administrators said that there was about 200 active mysql connections at that moment. The worst point is that we need to solve this ASAP, I can't do deep profiling analysis/code refactoring, so I'm considering 2 ways: my tables are MyIsam, I heard they use table-level locking which is very slow, is it right? could I change it to Innodb without worry? what if I take MySQL, and move it to dedicated machine with a lot of RAM?

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• What's the best Linux backup solution?

  - by Jon Bright

  We have a four Linux boxes (all running Debian or Ubuntu) on our office network. None of these boxes are especially critical and they're all using RAID. To date, I've therefore been doing backups of the boxes by having a cron job upload tarballs containing the contents of /etc, MySQL dumps and other such changing, non-packaged data to a box at our geographically separate hosting centre. I've realised, however that the tarballs are sufficient to rebuild from, but it's certainly not a painless process to do so (I recently tried this out as part of a hardware upgrade of one of the boxes) long-term, the process isn't sustainable. Each of the boxes is currently producing a tarball of a couple of hundred MB each day, 99% of which is the same as the previous day partly due to the size issue, the backup process requires more manual intervention than I want (to find whatever 5GB file is inflating the size of the tarball and kill it) again due to the size issue, I'm leaving stuff out which it would be nice to include - the contents of users' home directories, for example. There's almost nothing of value there that isn't in source control (and these aren't our main dev boxes), but it would be nice to keep them anyway. there must be a better way So, my question is, how should I be doing this properly? The requirements are: needs to be an offsite backup (one of the main things I'm doing here is protecting against fire/whatever) should require as little manual intervention as possible (I'm lazy, and box-herding isn't my main job) should continue to scale with a couple more boxes, slightly more data, etc. preferably free/open source (cost isn't the issue, but especially for backups, openness seems like a good thing) an option to produce some kind of DVD/Blu-Ray/whatever backup from time to time wouldn't be bad My first thought was that this kind of incremental backup was what tar was created for - create a tar file once each month, add incrementally to it. rsync results to remote box. But others probably have better suggestions.

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• Prototyping Qt/C++ in Python

  - by tstenner

  I want to write a C++ application with Qt, but build a prototype first using Python and then gradually replace the Python code with C++. Is this the right approach, and what tools (bindings, binding generators, IDE) should I use? Ideally, everything should be available in the Ubuntu repositories so I wouldn't have to worry about incompatible or old versions and have everything set up with a simple aptitude install. Is there any comprehensive documentation about this process or do I have to learn every single component, and if yes, which ones? Right now I have multiple choices to make: Qt Creator, because of the nice auto completion and Qt integration. Eclipse, as it offers support for both C++ and Python. Eric (haven't used it yet) Vim PySide as it's working with CMake and Boost.Python, so theoretically it will make replacing python code easier. PyQt as it's more widely used (more support) and is available as a Debian package. Edit: As I will have to deploy the program to various computers, the C++-solution would require 1-5 files (the program and some library files if I'm linking it statically), using Python I'd have to build PyQt/PySide/SIP/whatever on every platform and explain how to install Python and everything else.

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• [RPM Building] How to take user input during install

  - by Sam

  So when I create a debian package, I am able to write a post-installation shell script that runs just fine. Currently mine is configured to do echo "Please enter your MySQL Database user (default root)" read MYSQL_USER echo "Please enter the MySQL Database user password (default root)" read -s MYSQL_PASS DBEXIST=0 CMD="create database lportal;use lportal;" (mysql -u$MYSQL_USER -p$MYSQL_PASS -e "$CMD") || ((DBEXIST++)) if [ $DBEXIST -ne 0 ]; then echo "Setup finished, but MySQL already has an lportal table. This could be from a previous installation of Liferay. If you want a fresh installation of this bundle, please remove the lportal table and reinstall this package." fi This works fine for Ubuntu. However, I can't seem to get user input to work with RPMs for Fedora. Is there a good way to take user input? From what I understand, RPMs were designed not to allow interactive installs. However I can't see a better way to do this.. Is there possibly a way to automatically find local MySQL settings without asking the user? Otherwise, what's the best way to ask for user input?

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• Subversion (svn) beginner's questions

  - by Marius

  Hello, Here's what i'm trying to do. I have a project in /var/www/project. I'd like to use svn for this project. I've installed SVN on my debian server for this purpose, but i don't understand how to use it and the googling got me even more confused. I'd like to create a repository /var/svn/project and use it. After some changes occur, i'd like to export all the code back to /var/www/project. Now here's what i've done: i've created a repository: svnadmin create /var/svn/project i've imported the code: svn import /var/www/project file:///var/svn/project -m "Initial import" i've checked out the code with "Versions" client Everything seems to work fine, but ... If i go to /var/svn/project, there are no source files from my project there or in any subdirectory. Although the svn client is able to checkout all of those files. So i've read that in svn, files are not stored separately neither in berkley db nor in fsfs filesystems. Then the question is ... how do i export the source back to /var/www/project? If i do an svn export command on the /var/svn/project directory, it says i'm not in a working copy :(

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• Java socket bug on linux (0xFF sent, -3 received)

  - by Marius

  While working on a WebSocket server in Java I came across this strange bug. I've reduced it down to two small java files, one is the server, the other is the client. The client simply sends 0x00, the string Hello and then 0xFF (per the WebSocket specification). On my windows machine, the server prints the following: Listening byte: 0 72 101 108 108 111 recieved: 'Hello' While on my unix box the same code prints the following: Listening byte: 0 72 101 108 108 111 -3 Instead of receiving 0xFF it gets -3, never breaks out of the loop and never prints what it has received. The important part of the code looks like this: byte b = (byte)in.read(); System.out.println("byte: "+b); StringBuilder input = new StringBuilder(); b = (byte)in.read(); while((b & 0xFF) != 0xFF){ input.append((char)b); System.out.print(b+" "); b = (byte)in.read(); } inputLine = input.toString(); System.out.println("recieved: '" + inputLine+"'"); if(inputLine.equals("bye")){ break; } I've also uploaded the two files to my server: Server.java Client.java My Windows machine is running windows 7 and my Linux machine is running Debian

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• deployd authentification using jquery ajax

  - by user2507987

  I have installed deployd in my debian 7.0.0 64 bit, I have also succesfully installed mongodb in it, I have create some collection and user collection in deployd dashboard, then using user guide how to connect and query the table in deployd, I choose jquery ajax to log in to deployd from my localhost site and after login success I try to get/post some data, but somehow deployd return access denied. I have create collection name it people, and then at the GET, POST, PUT Event I have write this code : cancelUnless(me, "You are not logged in", 401); then using this ajax code, I try to login and POST new people data: $(document).ready(function(){ /* Create query for username and password for login */ var request = new Object; request.username = 'myusername'; request.password = 'mypassword'; submitaddress = "http://myipaddress:myport/users/login"; $.ajax({ type: "POST", url: submitaddress, data: request, cache: false, success: function(data){ var returndata = eval(data); /* After Login success try to post people data */ if (returndata){ var request2 = new Object; request2.name = 'People Name'; submitaddress2 = "http://myipaddress:myport/people"; $.ajax({ type: "POST", url: submitaddress2, data: request2, cache: false, success: function(){ } }) } } } }); }) The login process success, it's return session id and my user id, but after login success and I try to POST people data it's return "You are not logged in", can anyone help me, what is the correct way to login to deployd using jquery from other website(cross domain)?

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• Uwsgi starts from root but not as a service

  - by vittore

  I have nginx + uwsgi setup for flask website. thats my nginx server { listen 80; server_name _; location /static/ { alias /var/www/site/app/static/; } location / { uwsgi_pass 127.0.0.1:5080; include uwsgi_params; } } And here is my uwsgi config.xml <uwsgi> <socket>127.0.0.1:5080</socket> <autoload/> <daemonize>/var/log/uwsgi_webapp.log</daemonize> <pythonpath>/var/www/site/</pythonpath> <module>run:app</module> <plugins>python27</plugins> <virtualenv>/var/www/venv/</virtualenv> <processes>1</processes> <enable-threads/> <master /> <harakiri>60</harakiri> <max-requests>2000</max-requests> <limit-as>512</limit-as> <reload-on-as>256</reload-on-as> <reload-on-rss>192</reload-on-rss> <no-orphans/> <vacuum/> </uwsgi> When I trying to start uwsgi service (service uwsgi start) it says ok but there is no uwsgi process and I see the following in the log: *** Starting uWSGI 1.0.3-debian (64bit) on [Fri Oct 25 00:43:13 2013] *** compiled with version: 4.6.3 on 17 July 2012 02:26:54 current working directory: / writing pidfile to /run/uwsgi/app/gsk/pid detected binary path: /usr/bin/uwsgi-core setgid() to 33 setuid() to 33 limiting address space of processes... your process address space limit is 536870912 bytes (512 MB) your memory page size is 4096 bytes *** WARNING: you have enabled harakiri without post buffering. Slow upload could be rejected on post-unbuffered webservers *** uwsgi socket 0 bound to TCP address 127.0.0.1:5080 fd 6 bind(): Permission denied [socket.c line 107] However when I start uwsgi as a root uwsgi --socket 127.0.0.1:5080 --module run --callab app --harakiri 15 --harakiri-verbose --logto2 tmp/uwsgi.log It starts just fine and after restarting nginx I can access website. What can be an issue ?

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• Partitioning recommendations for a Proxmox VM Server (OpenVZ)

  - by luison

  We are new to virtualization and we are planning to turn our online server into a virualized one, mainly for maintenance, backup and recovery improvements. Initially we would only have one real virtual system with load plus 1-3 copys for testing and recovering and maybe a small centralized syslog virtual machine. We would like, if possible the host machine to include an iptables plus rsync to back up to other machines and some other global security systems. Due to this and the offerings of our hosting supplier we are mainly considering Proxmox for its simplicity (we like the idea of its web admin panel) and as I also understand that the container approach of OpenVMZ systems may fit well resource wise with our setup. The base system comes with debian so we can personalise it to our requirements. Proxmox installations default installs an LVM partition for the VMs. Our doubts are with the fact of what would be the best partition structure for this considering that: we would like to have a mirror of the root partition we could boot from if required (our provider supports booting the system from another partition via control panel) we ideally would like to have a partition that could be shared among the VM systems. We still don't know if this is possible directly with OpenVMZ containers, otherwise we are considering doing this by sharing it via NFS on the host machine. we want to use the backup system available on the proxmox host administrator to programme VMs backups and then rsync it to another machine. With this based on a Linux Raid of aprox (750Gb) we are considering something like: ext3_1/ - (20Gb) ext3_2/bak_root - (20Gb) mostly unmounted, root partition sync LVM_1 /var/lib/vz - (390Gb) partition for virtual images LVM_2 /shared_data - (30Gb) LVM_3 /backups - (300Gb) where all backups would be allocated Our initial tests with Proxmox seem to have issues with snapshots backups like this, perhaps caused by the fact that they can not be done to another LVM partition (error: command 'lvcreate --size 1024M --snapshot --name vzsnap-ns204084.XXX.net-0 /dev/pve/LV' failed with exit code 5) in which case we might have to use a standart ext3 partition (but unsure if we can do this with the 4 primary partition limitations). Does this makes more or less sense? Would it be mad to for example write VMs /var/logs to a NFS mounted partition (on the host system)? Are their any other easier ways to mount host system partitions (or folders) to the VMs?

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• pxe boot fails with message: no DEFAULT or UI configuration directive found

  - by spockaroo

  I am trying to pxe-boot a machine (client), and in the process I am trying to setup a tftp server that this machine can boot off. On the server, which runs Ubuntu 10.10, I have setup dhcp, dns, nfs, and tftp-hpa servers. All the servers/deamons start fine. I tested the tftp server by using a tftp client and downloading a file that the server directory hosts. My /etc/xinet.d/tftp looks like this service tftp { disable = no socket_type = dgram wait = yes user = nobody server = /usr/sbin/in.tftpd server_args = -v -s /var/lib/tftpboot only_from = 10.1.0.0/24 interface = 10.1.0.1 } My /etc/default/tftpd-hpa looks like this RUN_DAEMON="yes" OPTIONS="-l -s /var/lib/tftpboot" TFTP_USERNAME="tftp" TFTP_DIRECTORY="/var/lib/tftpboot" TFTP_ADDRESS="0.0.0.0:69" TFTP_OPTIONS="--secure" My /var/lib/tftpboot/ directory looks like this initrd.img-2.6.35-25-generic-pae vmlinuz-2.6.35-25-generic-pae pxelinux.0 pxelinux.cfg -- default I did sudo chmod 644 /var/lib/tftpboot/pxelinux.cfg/default chmod 755 /var/lib/tftpboot/initrd.img-2.6.35-25-generic-pae chmod 755 /var/lib/tftpboot/vmlinuz-2.6.35-25-generic-pae /var/lib/tftpboot/pxelinux.cfg has the following contents SERIAL 0 19200 0 LABEL linux KERNEL vmlinuz-2.6.35-25-generic-pae APPEND root=/dev/nfs initrd=initrd.img-2.6.35-25-generic-pae nfsroot=10.1.0.1:/nfsroot ip=dhcp console=ttyS0,19200n8 rw I copied /var/lib/tftpboot/pxelinux.0 from /usr/lib/syslinux/ after installing the package syslinux-common. Also just for completeness, /etc/dhcp3/dhcpd.conf the following lines (relevant to this interface) subnet 10.1.0.0 netmask 255.255.255.0 { range 10.1.0.100 10.1.0.240; option routers 10.1.0.1; option broadcast-address 10.1.0.255; option domain-name-servers 10.1.0.1; filename "pxelinux.0"; } When I boot the client machine, and watch the output over the serial port, I notice that the client requests an ip address from the server and gets it. Then I see TFTP being displayed - indicating that it is trying to connect to the TFTP server. This succeeds, and I see TFTP.|, which return immediately displaying the following message PXELINUX 4.01 debian-20100714 Copyright (C) 1994-2010 H. Peter Anvin et al No DEFAULT or UI configuration directive found! boot: /var/log/syslog shows Feb 20 15:24:05 ch in.tftpd[2821]: tftp: client does not accept options What option is it talking about in the syslog? I assume it is referring to OPTIONS or TFTP_OPTIONS, but what am I doing wrong?

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• Apache2 name based virtual host always redirect 301

  - by Francesco

  I've got a server (runnging Debian Squeeze) with Apache 2.2, there are 4 site running there. I'm using namebased virtulhosts because I've got a single IP. Initial configuration has been made with Webmin and probably something has been messed up.. firstdomain.com is my default domain and is working correctly, seconddomain.com is another site that is working. Now I want to add lastdomain.tk as a new site, so I've made this config file: root@webamp:/etc/apache2# cat sites-available/lastdomain.tk.conf <VirtualHost *:80> DocumentRoot /home/server/Condivisione/RAID/lastdomain.tk ServerName www.alazanes.tk ServerAlias alazanes.tk </VirtualHost> I've added it to enabled-sites and restarted apache. The problem is that if I go to lastdomain.tk (or www.lastdomain.tk) I'm redirected to firstdomain.com with a 301 redirect. Both lastdomain.tk and www.lastdomain.tk are A DNS records pointing to my IP address. Strange thing is that if a change DocumentRoot of lastdomain.tk to DocumentRoot /home/server/Condivisione/RAID/Sito_SecondDomain I correctly see seconddomain.com content without being redirected (lastdomain.tk is showed on address bar) These are the other configurations I'm using. root@webamp:/root# source /etc/apache2/envvars ; /usr/sbin/apache2 -S VirtualHost configuration: wildcard NameVirtualHosts and _default_ servers: *:443 webamp.firstdomain.com (/etc/apache2/sites-enabled/ssl.bbteam:1) *:80 is a NameVirtualHost default server firstdomain.com (/etc/apache2/sites-enabled/000-default:7) port 80 namevhost firstdomain.com (/etc/apache2/sites-enabled/000-default:7) port 80 namevhost www.lastdomain.tk (/etc/apache2/sites-enabled/lastdomain.tk.conf:1) ## other domains ## port 80 namevhost seconddomain.com (/etc/apache2/sites-enabled/seconddomain.com.conf:1) Syntax OK Content of default config file is root@webamp:/etc/apache2# cat sites-available/default <VirtualHost *:80> ServerAdmin [email protected] ServerName firstdomain.com ServerAlias www.firstdomain.com direct.firstdomain.com DocumentRoot /home/server/Condivisione/RAID/Sito_Web_Apache_su_80 ErrorLog /var/log/apache2/error.log LogLevel warn CustomLog /var/log/apache2/access.log combined </VirtualHost> content of second domain config file is root@webamp:/etc/apache2# cat sites-available/seconddomain.com.conf <VirtualHost *:80> DocumentRoot /home/server/Condivisione/RAID/Sito_SecondDomain ServerName seconddomain.com ServerAlias www.seconddomain.com direct.seconddomain.com #redirect 301 / http://www.seconddomain.com/ <Directory "/home/server/Condivisione/RAID/Sito_SecondDomain"> allow from all Options +Indexes </Directory> </VirtualHost> Probably a file permission problem? root@webamp:/root# ls -lh /home/server/Condivisione/RAID/ total 7.1M drwxrwxr-x 15 www-data server 4.0K Jun 5 13:29 Sito_SecondDomain drwxrwxrwx 23 server server 4.0K Jun 7 16:22 Sito_Web_Apache_su_80 drwxrwxr-x 17 www-data server 4.0K Jun 8 09:56 alazanes.tk Do someone have an idea of what is happening? Thanks, Francesco

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• Apache2 - mod_expire and mod_rewrite not working in httpd.conf - serving content from tomcat

  - by Ankit Agrawal

  Hi, I am using apache2 server running on debian which forwards all the http request to tomcat installed on same machine. I have two files under my /etc/apache2/ folder apache2.conf and httpd.conf I modified httpd.conf file to look like following. # forward all http request on port 80 to tomcat ProxyPass / ajp://127.0.0.1:8009/ ProxyPassReverse / ajp://127.0.0.1:8009/ # gzip text content AddOutputFilterByType DEFLATE text/plain AddOutputFilterByType DEFLATE text/html AddOutputFilterByType DEFLATE text/xml AddOutputFilterByType DEFLATE text/css AddOutputFilterByType DEFLATE text/javascript AddOutputFilterByType DEFLATE application/xml AddOutputFilterByType DEFLATE application/xhtml+xml AddOutputFilterByType DEFLATE application/rss+xml AddOutputFilterByType DEFLATE application/javascript AddOutputFilterByType DEFLATE application/x-javascript DeflateCompressionLevel 9 BrowserMatch ^Mozilla/4 gzip-only-text/html BrowserMatch ^Mozilla/4\.0[678] no-gzip BrowserMatch \bMSIE !no-gzip !gzip-only-text/html # Turn on Expires and mark all static content to expire in a week # unset last modified and ETag ExpiresActive On ExpiresDefault A0 <FilesMatch "\.(jpg|jpeg|png|gif|js|css|ico)$" ExpiresDefault A604800 Header unset Last-Modified Header unset ETag FileETag None Header append Cache-Control "max-age=604800, public" </FilesMatch RewriteEngine On # rewrite all www.example.com/content/XXX-01.js and YYY-01.css files to XXX.js and YYY.css RewriteRule ^content/(js|css)/([a-z]+)-([0-9]+)\.(js|css)$ /content/$1/$2.$4 # remove all query parameters from URL after we are done with it RewriteCond %{THE_REQUEST} ^GET\ /.*\;.*\ HTTP/ RewriteCond %{QUERY_STRING} !^$ RewriteRule .* http://example.com%{REQUEST_URI}? [R=301,L] # rewrite all www.example.com to example.com RewriteCond %{HTTP_HOST} ^www\.example\.com$ [NC] RewriteRule ^(.*)$ http://example.com/$1 [R=301,L] I want to achieve following. forward all traffic to tomcat GZIP all the text content. Put 1 week expiry header to all static files and unset ETag/last modified header. rewrite all js and css file to certain format. remove all the query parameters from URL forward all www.example.com to example.com The problem is only 1 and 2 are working. I tried a lot with many combinations but the expire and rewrite rule (3-6) do not work at all. I also tried moving these rules to apache2.conf and .htaccess files but it didn't work either. It does not give any error but these rules are simple ignored. expires and rewrite modules are ENABLED. Please let me know what should I do to fix this. 1. Do I need to add something else in httpd.conf file (like Options +FollowSymLink) or something else? 2. Do I need to add something in apache2.conf file? 3. Do I need to move these rules to .htaccess file? If yes, what should I write in that file and where should I keep that file? in /etc/apache2/ folder or /var/www/ folder? 4. Any other info to make this work? Thanks, Ankit

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• mount_afp on linux, user rights

  - by Antonio Sesto

  I need to mount a remote filesystem on a linux box using the afp protocol. The linux box runs an old Debian 4. I downloaded the source code of mount_afp, compiled it and installed it with all the required packages. Then created /etc/fuse with the following command: mknod /dev/fuse c 10 229 (according to the instructions here) I can mount the remote filesystem as root by executing: mount_afp afp://USER:PASSWD@REMOTE_SERVER/FOLDER /mnt/MOUNTPOINT/ but the same command fails when run as normal user (of the local machine). After reading here and there, I created a group fuse, and added my normal user U to the group fuse: [prompt] groups U U fuse Then modified the group of /dev/fuse, that now has the following rights: 0 crwxrwx--- 1 root fuse 10, 229 Feb 8 15:33 /dev/fuse However, if the user U tries to mount the remote filesystem by using the same command as above, U gets the following error: Incorrect permissions on /dev/fuse, mode of device is 20770, uid/gid is 0/1007. But your effective uid/gid is 1004/1004 But the user U with uid 1004 has also gid 1007 (group fuse). I might think the problem is related to real/effective/etc. ID, but I do not know how to proceed and could not find any clear instructions. Could you please help me? There is also another problem. If I mount /mnt/MOUNTPOINT as root and run ls -l /mnt, I get: drwxrwxrwx 15 root root 466 Feb 8 16:34 MONTPOINT If I run ls -l /mnt as normal user U I get: ? ?????????? ? ? ? ? ? MOUNTPOINT in fact when I try to cd /mnt/MOUNTPOINT I get: $-> cd /mnt/MOUNTPOINT -sh: cd: /mnt/MOUNTPOINT: Not a directory Then I unmount /mnt/MOUNTPOINT as root and run again ls -l /mnt as normal user U I get: 0 drwxr-xr-x 2 root root 6 Feb 8 15:32 MOUNTPOINT/ After reading Frank's answer, I killed every shell/process running with privileges of user U. Still U cannot mount the remote filesystem, but the error message has changed. Now it is: "Login error: Authentication failed". The problem is not related to remote login/password since the same command works perfectly when run as root of the local machine. Since I cannot get mount_afp to work with normal users, I decided to follow mgorven's suggestion. So I run the commands: mount_afp -o allow_other afp://USER:PASSWD@REMOTE_SERVER/FOLDER /mnt/MOUNTPOINT/ and mount_afp -o user=U afp://USER:PASSWD@REMOTE_SERVER/FOLDER /mnt/MOUNTPOINT/ The mount succeeds but user U cannot access the mount point. If U executes ls -l in /mnt U@LOCAL_HOST [/mnt] $-> ls -l ls: cannot access MOUNT_POINT: Permission denied total 0 ? ?????????? ? ? ? ? ? MOUNT_POINT Is it so hard to have this utility working?

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• postfix cannot getting my domain name?

  - by Kossel

  Hi I'm trying to setup webmin+postfix+dovecot+roundcube, for this moment I want things be as simple as possible so I'm using linux users as email accounts. I can send/receive from the same domain, I mean [email protected] can send/receive to/from [email protected] I tested smtp/imap with outlook and says no problem. if I send a mail from gmail it reject with error of: Technical details of temporary failure: The recipient server did not accept our requests to connect. when I login with roundcube the email address display in the right corner is something like user1@com and I get this error message from logs: [11-Nov-2012 07:39:03 +0400]: IMAP Error: Login failed for user1 from 187.150.xx.xx. Could not connect to com:143: php_network_getaddresses: getaddrinfo failed: Name or service not known in /var/www/webmail/program/include/rcube_imap.php on line 191 (POST /webmail/?_task=login&_action=login) it says Could not connect to com:143 looks like it cannot read the domain name. I used http://mxtoolbox.com/ to check the mx record and it says it can find the server of mail.mydomain.com. I quit sure the problema is from postfix or my server configs, but I have been looking for every config file and cannot find the answer of this. any suggestion I will appreciate. here are some of my configs (I don't want to make this question too long, I can provide any other information to solve this question): postfix main.cf #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU) biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no # TLS parameters smtpd_tls_cert_file = /etc/ssl/certs/ssl-cert-snakeoil.pem smtpd_tls_key_file = /etc/ssl/private/ssl-cert-snakeoil.key smtpd_use_tls=yes smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache smtpd_sasl_security_options = noanonymous smtpd_sasl_auth_enable = yes smtpd_sasl_type = dovecot smtpd_sasl_path = private/auth # See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for # information on enabling SSL in the smtp client. mydomain = mydomain.com myhostname = mail.mydomain.com alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases mydestination = $mydomain, $myhostname mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_command = procmail -a "$EXTENSION" mailbox_size_limit = 0 recipient_delimiter = + virtual_alias_domains = mydomain.com smtpd_recipient_restrictions = permit_mynetworks reject_unauth_destination permit_sasl_authenticated myorigin = $mydomain roundcube conf // ---------------------------------- // IMAP // ---------------------------------- $rcmail_config['default_host'] = '%d'; $rcmail_config['default_port'] = 143; $rcmail_config['imap_auth_type'] = null; $rcmail_config['imap_delimiter'] = null; $rcmail_config['imap_ns_personal'] = null; $rcmail_config['imap_ns_other'] = null; $rcmail_config['imap_ns_shared'] = null; $rcmail_config['imap_force_caps'] = false; $rcmail_config['imap_force_lsub'] = false; $rcmail_config['imap_force_ns'] = false; $rcmail_config['imap_timeout'] = 0; $rcmail_config['imap_auth_cid'] = null; $rcmail_config['imap_auth_pw'] = null; $rcmail_config['imap_cache'] = null; $rcmail_config['messages_cache'] = false;

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• Mail troubleshooting

  - by Jason Swett

  I'm just trying to send myself an e-mail. On on Ubuntu using sendmail. For some reason, it doesn't work. Here's the command I'm running and what shows up when I run it: jason@ve:~$ echo "Subject: test" | /usr/lib/sendmail -v [email protected] [email protected]... Connecting to [127.0.0.1] via relay... 220 ve.5wrvhfxg.vesrv.com ESMTP Sendmail 8.14.3/8.14.3/Debian-9.1ubuntu1; Wed, 29 Dec 2010 13:51:49 -0800; (No UCE/UBE) logging access from: localhost.localdomain(OK)-localhost.localdomain [127.0.0.1] >>> EHLO ve.5wrvhfxg.vesrv.com 250-ve.5wrvhfxg.vesrv.com Hello localhost.localdomain [127.0.0.1], pleased to meet you 250-ENHANCEDSTATUSCODES 250-PIPELINING 250-EXPN 250-VERB 250-8BITMIME 250-SIZE 250-DSN 250-ETRN 250-DELIVERBY 250 HELP >>> VERB 250 2.0.0 Verbose mode >>> MAIL From:<[email protected]> SIZE=14 250 2.1.0 <[email protected]>... Sender ok >>> RCPT To:<[email protected]> >>> DATA 250 2.1.5 <[email protected]>... Recipient ok 354 Enter mail, end with "." on a line by itself >>> . 050 <[email protected]>... Connecting to 205.186.165.157. via esmtp... 050 <[email protected]>... Deferred: Connection refused by 205.186.165.157. 250 2.0.0 oBTLpnEj012261 Message accepted for delivery [email protected]... Sent (oBTLpnEj012261 Message accepted for delivery) Closing connection to [127.0.0.1] >>> QUIT 221 2.0.0 ve.5wrvhfxg.vesrv.com closing connection It seems to me that the "Connection refused by 205.186.165.157" part is where things are going wrong, but I have no idea where or how to begin troubleshooting. Any advice?

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• OS X: Finder error -36 when using SMB shares on a Samba server bound to AD

  - by Frenchie

  We're looking at deploying SMB homes on Debian (5.0.3) for our mac clients rather than purchasing four new Xserves. We've got our test servers built and functioning properly. Windows clients behave perfectly, but we've run into an issue with OS X (10.6.x and 10.5.x). We're going this route instead of Windows file servers due to a whole bunch of other issues that arise when going that way. Specifically, when mounting a SMB share with unix extensions switched on and the remote server bound to AD, the finder cannot save files on the share, instead touching the file and then bombing out with a -36 IO error, folder creation is fine. Copying files in the terminal behaves fine and the problem seems to be limited to the finder. The issue arises (I think) as the remote UID/GID is passed across when using unix extensions. OS X uses its own winbind idmap (odsam) to work out the effective UID/GID from AD users and groups whilst we're using a rid map on the server. Consequently, there is a mismatch in ownership which the finder chooses to honour. How OS X appears to handle this is to use the remote uid and gid at the file permission level (see below) and then set an OS X acl granting the local uid/gid to have the appropriate permissions on the file. I think the finder touches the file (which the kernel allows because of the ACL) and then checks the filesystem perms and drops out with the IO error. On a Client fc-003353-d:homes2 root# ls -led test/ drwx------+ 2 135978 100513 16384 Feb 3 15:14 test/ 0: user:jfrench allow list,add_file,search,delete,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity,writesecurity,chown,file_inherit,directory_inherit 1: group:ARTS\domain users allow 2: group:everyone allow 3: group:owner allow list,add_file,search,delete,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity,writesecurity,chown,file_inherit,directory_inherit,only_inherit 4: group:group allow list,add_file,search,delete,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity,writesecurity,chown,file_inherit,directory_inherit,only_inherit 5: group:everyone allow list,add_file,search,delete,add_subdirectory,delete_child,readattr,writeattr,readextattr,writeextattr,readsecurity,writesecurity,chown,file_inherit,directory_inherit,only_inherit We've tried the following without any luck: Setting the Linux side file owner to match the OS X GID/UID Adding ACLs on the linux filesystem which grant the OS X GID/UID perms Disabling extended attributes Setting steams=no in /etc/nsmb.conf on the client We're currently running a workaround which is to just turn off unix extensions which forces the macs to just mount the share as the local user with u=rwx perms. This works for most things but is causing a few apps that expect certain perms to break in subtle ways. Worst case scenario is that we'll continue running in this way but we would like to have the unix extensions on. Regards. Relevant SMB config below: [global] workgroup = ARTS realm = *snip* security = ADS password server = *snip* unix extensions = yes panic action = /usr/share/panic-action %d idmap backend = rid:ARTS=100000-10000000 idmap uid = 100000-10000000 idmap gid = 100000-10000000 winbind enum users = Yes winbind enum groups = Yes veto files = /lost+found/aquota.*/ hide files = /desktop.ini/$RECYCLE.BIN/.*/AppData/Library/ ea support = yes store dos attributes = yes map system = no map archive = no map readonly = no

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• APC UPS replace battery light and apcupsd reporting "replace battery"

  - by mgjk

  We have an APC Smart UPS 1500. The "Replace Battery" light is on, and apcupsd reports: Emergency! Batteries have failed on UPS xxxx. Change them NOW However, from this article, http://sturgeon.apcc.com/kbasewb2.nsf/for+external/f39c4312fcaf7b948525679a005ebb78?OpenDocument it seems that it's not so clear that the UPS battery needs to be replaced. Stranger, according to the information on the UPS, an 11 minute runtime at 42.9% load running at 27.7V isn't so bad. Any thoughts about what to try next? We're a non-profit, money is an object. It would be a shame to replace a battery with a year or so left in it. # apcaccess status APC : 001,041,1017 DATE : Thu Mar 29 13:01:41 EDT 2012 HOSTNAME : oreilly2 VERSION : 3.14.6 (16 May 2009) debian UPSNAME : xxxx CABLE : Custom Cable Smart MODEL : Smart-UPS 1500 UPSMODE : Stand Alone STARTTIME: Thu Mar 29 12:57:30 EDT 2012 STATUS : ONLINE LINEV : 112.3 Volts LOADPCT : 42.9 Percent Load Capacity BCHARGE : 100.0 Percent TIMELEFT : 11.0 Minutes MBATTCHG : 5 Percent MINTIMEL : 3 Minutes MAXTIME : 0 Seconds OUTPUTV : 112.3 Volts SENSE : High DWAKE : -01 Seconds DSHUTD : 090 Seconds LOTRANS : 106.0 Volts HITRANS : 127.0 Volts RETPCT : 000.0 Percent ITEMP : 23.8 C Internal ALARMDEL : Always BATTV : 27.7 Volts LINEFREQ : 60.0 Hz LASTXFER : No transfers since turnon NUMXFERS : 0 TONBATT : 0 seconds CUMONBATT: 0 seconds XOFFBATT : N/A SELFTEST : NO STATFLAG : 0x07000008 Status Flag SERIALNO : AS0603298896 BATTDATE : 2006-01-14 NOMOUTV : 120 Volts NOMBATTV : 24.0 Volts FIRMWARE : 601.3.D USB FW:1.5 APCMODEL : Smart-UPS 1500 END APC : Thu Mar 29 13:02:12 EDT 2012 Error when running upstest You are using a SMART cable type, so I'm entering SMART test mode mode.type = USB_UPS Setting up the port ... Hello, this is the apcupsd Cable Test program. This part of apctest is for testing Smart UPSes. Please select the function you want to perform. 1) Query the UPS for all known values 2) Perform a Battery Runtime Calibration 3) Abort Battery Calibration 4) Monitor Battery Calibration progress 5) Program EEPROM 6) Enter TTY mode communicating with UPS 7) Quit Select function number: 2 First ensure that we have a good link and that the UPS is functionning normally. Simulating UPSlinkCheck ... YWrote: Y Got: getline failed. Apparently the link is not up. Giving up.

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• Secure ldap problem

  - by neverland

  I have tried to config my openldap to have secure connection by using openssl on Debian5. By the way, I got trouble during the below command. ldap:/etc/ldap# slapd -h 'ldap:// ldaps://' -d1 >>> slap_listener(ldaps://) connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 connection_read(15): unable to get TLS client DN, error=49 id=7 connection_get(15): got connid=7 connection_read(15): checking for input on id=7 ber_get_next ber_get_next on fd 15 failed errno=0 (Success) connection_closing: readying conn=7 sd=15 for close connection_close: conn=7 sd=15 Then I have search for "unable to get TLS client DN, error=49 id=7" but it seems no where has a good solution to this yet. Please help. Thanks # Well, I try to fix something to get it work but now I got this ldap:~# slapd -d 256 -f /etc/openldap/slapd.conf @(#) $OpenLDAP: slapd 2.4.11 (Nov 26 2009 09:17:06) $ root@SD6-Casa:/tmp/buildd/openldap-2.4.11/debian/build/servers/slapd could not stat config file "/etc/openldap/slapd.conf": No such file or directory (2) slapd stopped. connections_destroy: nothing to destroy. What should I do now? log : ldap:~# /etc/init.d/slapd start Starting OpenLDAP: slapd - failed. The operation failed but no output was produced. For hints on what went wrong please refer to the system's logfiles (e.g. /var/log/syslog) or try running the daemon in Debug mode like via "slapd -d 16383" (warning: this will create copious output). Below, you can find the command line options used by this script to run slapd. Do not forget to specify those options if you want to look to debugging output: slapd -h 'ldaps:///' -g openldap -u openldap -f /etc/ldap/slapd.conf ldap:~# tail /var/log/messages Feb 8 16:53:27 ldap kernel: [ 123.582757] intel8x0_measure_ac97_clock: measured 57614 usecs Feb 8 16:53:27 ldap kernel: [ 123.582801] intel8x0: measured clock 172041 rejected Feb 8 16:53:27 ldap kernel: [ 123.582825] intel8x0: clocking to 48000 Feb 8 16:53:27 ldap kernel: [ 131.469687] Adding 240932k swap on /dev/hda5. Priority:-1 extents:1 across:240932k Feb 8 16:53:27 ldap kernel: [ 133.432131] EXT3 FS on hda1, internal journal Feb 8 16:53:27 ldap kernel: [ 135.478218] loop: module loaded Feb 8 16:53:27 ldap kernel: [ 141.348104] eth0: link up, 100Mbps, full-duplex Feb 8 16:53:27 ldap rsyslogd: [origin software="rsyslogd" swVersion="3.18.6" x-pid="1705" x-info="http://www.rsyslog.com"] restart Feb 8 16:53:34 ldap kernel: [ 159.217171] NET: Registered protocol family 10 Feb 8 16:53:34 ldap kernel: [ 159.220083] lo: Disabled Privacy Extensions

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• Benchmarking hosting providers IO with Bonnie

  - by Derek Organ

  Ok, because of a bunch of projects I'm working on I've access to dedicated Servers on a 3 hosting providers. As an experiment and for educational purposes I decided to see if I could benchmark how good the IO is with each. Bit of research lead me to Bonnie++ So I installed it on the server and ran this simple command /usr/sbin/bonnie -d /tmp/foo The 3 machines in different hosting providers are all dedicated machines, one is a VPS, other two are on some cloud platform e.g. VMWare / Xen using some kind of clustered SAN for storage This might be a naive thing to do but here are the results I found. HOST A Version 1.03c ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP xxxxxxxxxxxxxxxx 1G 45081 88 56244 14 19167 4 20965 40 67110 6 67.2 0 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 15264 28 +++++ +++ +++++ +++ +++++ +++ +++++ +++ +++++ +++ xxxxxxxx,1G,45081,88,56244,14,19167,4,20965,40,67110,6,67.2,0,16,15264,28,+++++,+++,+++++,+++,+++++,+++,+++++,+++,+++++,+++ HOST B Version 1.03d ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP xxxxxxxxxxxx 4G 43070 91 64510 15 19092 0 29276 47 39169 0 448.2 0 ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 24799 52 +++++ +++ +++++ +++ 25443 54 +++++ +++ +++++ +++ xxxxxxx,4G,43070,91,64510,15,19092,0,29276,47,39169,0,448.2,0,16,24799,52,+++++,+++,+++++,+++,25443,54,+++++,+++,+++++,+++ HOST C Version 1.03c ------Sequential Output------ --Sequential Input- --Random- -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP xxxxxxxxxxxxx 1536M 15598 22 85698 13 258969 20 16194 22 723655 21 +++++ +++ ------Sequential Create------ --------Random Create-------- -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 14142 22 +++++ +++ 18621 22 13544 22 +++++ +++ 17363 21 xxxxxxxx,1536M,15598,22,85698,13,258969,20,16194,22,723655,21,+++++,+++,16,14142,22,+++++,+++,18621,22,13544,22,+++++,+++,17363,21 Ok, so first off what is the best way to read the figures and are there any issues with really comparing these numbers? Is this in any way a true representation of IO Speed? If not is there any way for me to test that? Note: these 3 machines are using either Ubuntu or Debian (I presume that doesn't really matter)

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• 2-Bay External HDD Enclosure in JBOD mode fails to detect both drives (Linux & Windows)

  - by mgc8888

  I recently purchased a couple of USB 3.0 External HDD Enclosures to use for storage and backup; the idea was to have one act as backup to the other, with 4 x 3TB drives in total. However, the second drive in each is not accessible in either Linux nor Windows, and I could not determine the reason. 1. Situation The two enclosures are slightly different (couldn't find them in stock at the same time) yet from many little details appear to be the same Chinese base design with a tweaked outer shell. The models are: Sharkoon 2-Bay RAID Box Fantec MR-35DU3 The drives are Seagate 3TB Barracuda ST33000651AS, firmware CC44, all identical. From reading manuals and online sources, I determined that JBOD would be the optimal setup for my needs -- addressing the two drives separately in each enclosure would be important, making it easy to swap drives and mix&match them if needed; all the other modes implied the controller doing a combination of the drives. The software used was Debian GNU/Linux - testing/wheezy - kernel 2.6.39-2 and Windows 7 Ultimate. 2. Description of the problem Now, here comes the problem: every time I connect either of the enclosures to a PC using the supplied cable (tried a different one as well), only the HDD in the top bay is readable, the one below is detected yet errors out in various ways. According to the manuals, it should not happen: in JBOD, the system should be able to "see" two separate drives upon connection. This happens with both enclosures and any combination of HDDs (i.e. if I swap them, the same thing happens), so the HDDs are good and I think so are the enclosures (two different companies making similar products that failed in an identical fashion would be very unlikely). The top HDD can be used fine every time, I actually tried a speed test from Linux and got about 150MiB/s reads, so all is working as it should; the one below refuses to work every time. So the failure is consistent. To make sure this was not some obscure Linux bug, I tried the same under Windows 7, and the system also only created one drive letter for a drive of 3TB size (so it was only seeing one instead of both). Placing an older, known good, 2TB drive in the top bay made that the one recognised, so we have the same issue under Windows as well. Log entries under Linux (tested here with a 3TB and a 2TB drive so I could differentiate them; either one works in the top enclosure, in the test setup the 3TB one is on top). You can see them being detected, the top one is ok, but for the bottom one only errors: Jul 19 23:28:15 media kernel: [260150.582436] usb 6-1: New USB device found, idVendor=1ca1, idProduct=18ae Jul 19 23:28:15 media kernel: [260150.582440] usb 6-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 Jul 19 23:28:15 media kernel: [260150.582442] usb 6-1: Product: Usb Sata Bridge Jul 19 23:28:15 media kernel: [260150.582444] usb 6-1: Manufacturer: SYMWAVE Jul 19 23:28:15 media kernel: [260150.582446] usb 6-1: SerialNumber: 39584B304C4E3441 Jul 19 23:28:15 media kernel: [260150.870412] scsi11 : usb-storage 6-1:1.0 Jul 19 23:28:16 media kernel: [260151.882087] scsi 11:0:0:0: Direct-Access SYMWAVE ST33000651AS CC44 PQ: 0 ANSI: 4 Jul 19 23:28:16 media kernel: [260151.882242] scsi 11:0:0:1: Direct-Access SYMWAVE ST32000641AS CC12 PQ: 0 ANSI: 4 Jul 19 23:28:16 media kernel: [260151.882677] sd 11:0:0:0: Attached scsi generic sg2 type 0 Jul 19 23:28:16 media kernel: [260151.882774] sd 11:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16). Jul 19 23:28:16 media kernel: [260151.882857] sd 11:0:0:1: Attached scsi generic sg3 type 0 Jul 19 23:28:16 media kernel: [260151.882893] sd 11:0:0:0: [sdb] 5860533168 512-byte logical blocks: (3.00 TB/2.72 TiB) Jul 19 23:28:16 media kernel: [260151.883085] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.883582] sd 11:0:0:0: [sdb] Write Protect is off Jul 19 23:28:16 media kernel: [260151.883961] sd 11:0:0:1: [sdc] 3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB) Jul 19 23:28:16 media kernel: [260151.884145] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.884570] sd 11:0:0:1: [sdc] Write Protect is off Jul 19 23:28:16 media kernel: [260151.884855] sd 11:0:0:0: [sdb] Very big device. Trying to use READ CAPACITY(16). Jul 19 23:28:16 media kernel: [260151.885286] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.885807] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.909595] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.910159] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.910163] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.910167] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.910169] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.910172] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.910182] quiet_error: 2 callbacks suppressed Jul 19 23:28:16 media kernel: [260151.910570] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.911153] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.911156] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.911159] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.911161] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.911164] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.911385] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.911902] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.911905] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.911908] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.911910] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.911913] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.912128] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.912650] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.912653] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.912656] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.912657] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.912660] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.912876] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.913439] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.913442] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.913445] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.913446] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.913449] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 Jul 19 23:28:16 media kernel: [260151.945227] xhci_hcd 0000:03:00.0: WARN: Stalled endpoint Jul 19 23:28:16 media kernel: [260151.945863] sd 11:0:0:1: [sdc] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE Jul 19 23:28:16 media kernel: [260151.945866] sd 11:0:0:1: [sdc] Sense Key : Illegal Request [current] Jul 19 23:28:16 media kernel: [260151.945870] Info fld=0x0 Jul 19 23:28:16 media kernel: [260151.945871] sd 11:0:0:1: [sdc] Add. Sense: Invalid field in cdb Jul 19 23:28:16 media kernel: [260151.945875] sd 11:0:0:1: [sdc] CDB: Read(10): 28 20 00 00 00 00 00 00 08 00 (...) and so on for like 10 seconds until it gives up (...) 3. Question So, my question would be: what is causing this? Am I missing something, should I configure things differently, is this a known limitation? Searching online for more information did not yield any useful results... Thank you in advance for any help!

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• Linux Mint Wireless doesn't connect

  - by guisantogui

  I'm having a great problem, I've installed Linux mint debian edition (LMDE), and following this tutorial http://community.linuxmint.com/tutorial/view/161 I did installed the network driver. The available connections appears to me, but when i try to connect to my connection at first time, I got this message: "(4) Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken." And the following tries, I got this another message: "(32) Insufficient privileges." I'm accepting ideas. Thanks. EDIT: The last piece of the logs: Oct 5 00:22:38 gsouza-host ntpd[2116]: peers refreshed Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> (wlan0): bringing up device. Oct 5 00:22:42 gsouza-host wpa_supplicant[2055]: nl80211: 'nl80211' generic netlink not found Oct 5 00:22:42 gsouza-host wpa_supplicant[2055]: Failed to initialize driver 'nl80211' Oct 5 00:22:42 gsouza-host wpa_supplicant[2055]: rfkill: WLAN soft blocked Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> WiFi hardware radio set enabled Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> WiFi now enabled by radio killswitch Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> (wlan0): supplicant interface state: starting -> ready Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> (wlan0): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42] Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <info> (wlan0): supplicant interface state: ready -> inactive Oct 5 00:22:42 gsouza-host NetworkManager[2019]: <warn> Trying to remove a non-existant call id. Oct 5 00:22:42 gsouza-host wpa_supplicant[2055]: rfkill: WLAN unblocked Oct 5 00:22:44 gsouza-host avahi-daemon[1827]: Joining mDNS multicast group on interface wlan0.IPv6 with address fe80::7ae4:ff:fe4a:13a9. Oct 5 00:22:44 gsouza-host avahi-daemon[1827]: New relevant interface wlan0.IPv6 for mDNS. Oct 5 00:22:44 gsouza-host avahi-daemon[1827]: Registering new address record for fe80::7ae4:ff:fe4a:13a9 on wlan0.*. Oct 5 00:22:46 gsouza-host ntpd[2116]: Listen normally on 7 wlan0 fe80::7ae4:ff:fe4a:13a9 UDP 123 Oct 5 00:22:46 gsouza-host ntpd[2116]: peers refreshed

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• How to create a Windows 7 installation usb media from linux ? (to install Windows 7) - Help need to know better method

  - by Abel Coto

  I have been reading some web pages and posts here and in other forums about how to create a Windows 7 installation Usb media (to install windows 7 using a usb) from linux. I asked in technet about this , and they give me general ideas about how to do it I personally am not very familiar with linux, but basicaly all that you need to do... in whatever way you do it is the following: Format a usb flash drive, either fat32 or ntfs create a partition that is large enough to host the windows installation (give or take 3GB for 64bit, aroudn 2.5gb for 32bit) and mark that partition as active/bootable. Since this can be done with windows, but just as well with a tool like gparted, you should be able to do the same in debian. Once you have created that partition, mount the iso that you download, and copy all files starting from the root, into the root of the usb flash drive. That's all there's to it. There is a method that i found in various places,that is almost the same that the man of technet has said. But,there is a step,that in that method is done,that i don't know if it is really necessary,or not. Not allways dd works.Basically, the missing step was to write a proper boot sector to the usb stick, which can be done from linux with ms-sys. This works with the Win7 retail version. Here is the complete rundown again: Install ms-sys Check what device your usb media is asigned - here we will assume it is /dev/sdb. Delete all partitions, create a new one taking up all the space, set type to NTFS, and set it bootable: *# cfdisk /dev/sdb* Create NTFS filesystem: *# mkfs.ntfs -f /dev/sdb1* Mount iso and usb media: *# mount -o loop win7.iso /mnt/iso # mount /dev/sdb1 /mnt/usb* Copy over all files: *# cp -r /mnt/iso/* /mnt/usb/* Write Windows 7 MBR on usb stick: *# ms-sys -7 /dev/sdb* ...and you're done. Shouldn't the usb work without doing the last step "# ms-sys -7 /dev/sdb" or to make the usb bootable , is a must , not only to mark the partition as bootable ? Would be better use rsync instead of cp -r ? All this steps should be done as root, i suppose , or if not , chmod to 664 and chown the directories where are mounted the usb and the iso, no ? But i suppose that the easier thing is to copy the data as root , and that this will not affect to the data. Has anyone tried this method or some similar like copying the iso with dd ?

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• Automatically Applying Security Updates for AWS Elastic Beanstalk

  - by Eric Anderson

  I've been a fan of Heroku since it's earliest days. But I like the fact that AWS Elastic Beanstalk gives you more control over the characteristics of the instances. One thing I love about Heroku is the fact that I can deploy an app and not worry about managing it. I am assuming Heroku is ensuring all OS security updates are timely applied. I just need to make sure my app is secure. My initial research on Beanstalk shows that although it builds and configures the instances for you, after that it moves to a more manual management process. Security updates won't automatically be applied to the instances. It seems there are two areas of concerns: New AMI releases - As new AMI releases hit it seems we would want to run the latest (presumably most secure). But my research seems to indicate you need to manually launch a new setup to see the latest AMI version and then create a new environment to use that new version. Is there a better automated way of rotating your instances into new AMI releases? In between releases there will be security updates released for packages. Seems we want to upgrade those as well. My research seems to indicate people install commands to occasionally run a yum update. But since new instances are created/destroyed based on usage it seems that the new instances would not always have the updates (i.e. the time between the instance creation and the first yum update). So occasionally you will have instances that aren't patched. And you are also going to have instances constantly patching themselves until the new AMI release is applied. My other concern is that perhaps these security updates haven't gone through Amazon's own review (like the AMI releases do) and it might break my app to automatically update them. I know Dreamhost once had a 12 hour outage because they were applying debian updates completely automatically without any review. I want to make sure the same thing doesn't happen to me. So my question is does Amazon provide a way to offer fully managed PaaS like Heroku? Or is AWS Elastic Beanstalk really more of just a install script and after that you are on your own (other than the monitoring and deployment tools they provide)?

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• How to deny the web access to some files?

  - by Strae

  I need to do an operation a bit strange. First, i run on Debian, apache2 (which 'runs' as user www-data) So, I have simple text file with .txt ot .ini, or whatever extension, doesnt matter. These files are located in subfolders with a structure like this: www.example.com/folder1/car/foobar.txt www.example.com/folder1/cycle/foobar.txt www.example.com/folder1/fish/foobar.txt www.example.com/folder1/fruit/foobar.txt therefore, the file name always the same, ditto for the 'hierarchy', just change the name of the folder: /folder-name-static/folder-name-dinamyc/file-name-static.txt What I should do is (I think) relatively simple: I must be able to read that file by programs on the server (python, php for example), but if I try to retrieve the file contents by broswer (digiting the url www.example.com/folder1/car/foobar.txt, or via cUrl, etc..) I must get a forbidden error, or whatever, but not access the file. It would also be nice that even accessing those files via FTP are 'hidden', or anyway couldnt be downloaded (at least that I use with the ftp root and user data) How can I do? I found this online, be put in the file .htaccess: <Files File.txt> Order allow, deny Deny from all </ Files> It seems to work, but only if the file is in the web root (www.example.com / myfile.txt), and not in subfolders. Moreover, the folders in the second level (www.example.com/folder1/fruit/foobar.txt) will be dinamycally created.. I would like to avoid having to change .htaccess file from time to time. It is possible to create a rule, something like that, that goes for all files with given name, which is on www.example.com/folder-name-static/folder-name-dinamyc/file-name-static.txt, where those parts are allways the same, just that one change ? EDIT: As Dave Drager said, i could semplify this keeping those file outside the web accessible directory. But those directory's will contain others files too, images, and stuff used by my users, so i'm simply try to not have a duplicate folders system, like: /var/www/vhosts/example.com/httpdocs/folder1/car/[other folders and files here] /var/www/vhosts/example.com/httpdocs/folder1/cycle/[other folders and files here] /var/www/vhosts/example.com/httpdocs/folder1/fish/[other folders and files here] //and, then for the 'secrets' files: /folder1/data/car/foobar.txt /folder1/data/cycle/foobar.txt /folder1/data/fish/foobar.txt

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• Authenticating Apache HTTPd against multiple LDAP servers with expired accounts

  - by Brian Bassett

  We're using mod_authnz_ldap and mod_authn_alias in Apache 2.2.9 (as shipped in Debian 5.0, 2.2.9-10+lenny7) to authenticate against multiple Active Directory domains for hosting a Subversion repository. Our current configuration is: # Turn up logging LogLevel debug # Define authentication providers <AuthnProviderAlias ldap alpha> AuthLDAPBindDN "CN=Subversion,OU=Service Accounts,O=Alpha" AuthLDAPBindPassword [[REDACTED]] AuthLDAPURL ldap://dc01.alpha:3268/?sAMAccountName?sub? </AuthnProviderAlias> <AuthnProviderAlias ldap beta> AuthLDAPBindDN "CN=LDAPAuth,OU=Service Accounts,O=Beta" AuthLDAPBindPassword [[REDACTED]] AuthLDAPURL ldap://ldap.beta:3268/?sAMAccountName?sub? </AuthnProviderAlias> # Subversion Repository <Location /svn> DAV svn SVNPath /opt/svn/repo AuthName "Subversion" AuthType Basic AuthBasicProvider alpha beta AuthzLDAPAuthoritative off AuthzSVNAccessFile /opt/svn/authz require valid-user </Location> We're encountering issues with users that have accounts in both Alpha and Beta, especially when their accounts in Alpha are expired (but still present; company policy is that the accounts live on for at a minimum of 1 year). For example, when the user x (which has en expired account in Alpha, and a valid account in Beta), the Apache error log reports the following: [Tue May 11 13:42:07 2010] [debug] mod_authnz_ldap.c(377): [client 10.1.1.104] [14817] auth_ldap authenticate: using URL ldap://dc01.alpha:3268/?sAMAccountName?sub? [Tue May 11 13:42:08 2010] [warn] [client 10.1.1.104] [14817] auth_ldap authenticate: user x authentication failed; URI /svn/ [ldap_simple_bind_s() to check user credentials failed][Invalid credentials] [Tue May 11 13:42:08 2010] [error] [client 10.1.1.104] user x: authentication failure for "/svn/": Password Mismatch [Tue May 11 13:42:08 2010] [debug] mod_deflate.c(615): [client 10.1.1.104] Zlib: Compressed 527 to 359 : URL /svn/ Attempting to authenticate as a non-existant user (nobodycool) results in the correct behavior of querying both LDAP servers: [Tue May 11 13:42:40 2010] [debug] mod_authnz_ldap.c(377): [client 10.1.1.104] [14815] auth_ldap authenticate: using URL ldap://dc01.alpha:3268/?sAMAccountName?sub? [Tue May 11 13:42:40 2010] [warn] [client 10.1.1.104] [14815] auth_ldap authenticate: user nobodycool authentication failed; URI /svn/ [User not found][No such object] [Tue May 11 13:42:40 2010] [debug] mod_authnz_ldap.c(377): [client 10.1.1.104] [14815] auth_ldap authenticate: using URL ldap://ldap.beta:3268/?sAMAccountName?sub? [Tue May 11 13:42:44 2010] [warn] [client 10.1.1.104] [14815] auth_ldap authenticate: user nobodycool authentication failed; URI /svn/ [User not found][No such object] [Tue May 11 13:42:44 2010] [error] [client 10.1.1.104] user nobodycool not found: /svn/ [Tue May 11 13:42:44 2010] [debug] mod_deflate.c(615): [client 10.1.1.104] Zlib: Compressed 527 to 359 : URL /svn/ How do I configure Apache to correctly query Beta if it encounters an expired account in Alpha?

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