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• Impossible to stop raid device

  - by Traroth

  I'm trying to stop a RAID disk in order to replace it by a new one, as this one is not working properly. I'm typing mdadm --stop /dev/md1, and I'm getting an error message: mdadm: fail to stop array /dev/md1: Device or resource busy I'm getting this message even if I reboot the server, and I can't see a process that could cause this. The server is working under a Debian with a 2.6.18-4-amd64 kernel. Could you help? Edit: Mote details about what my colleague tried out. After unmounting sda1, the command mdadm --remove /dev/md0 /dev/sda1 worked. But now, we still have an error message after mdadm --remove /dev/md1 /dev/sda5: mdadm: hot remove failed for /dev/sda5: Device or resource busy I still don't understand completly how the different partitions are mounted, so I suppose there is something I don't understand in the currenct situation...

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• Reinstall linux over ssh.

  - by DoomStone

  Hello I'm having a large problem with our development server, it have had a program called Webmin + a total idiot have been administrating the Linux sever. Witch now have resulted in the server being totally trashed, there are so many different kinds of the same program install that anything doesn’t work. And don't get me started on the users and groups :D Well at last I have been given the responsibility to administrate our development server. But I would like to start from scratch, instead of trying to find every single package and config the previous admin have **ed up. But the problem is that it is a remote hosted server with ssh access. The server is running Debian, but i am thinking of reinstalling it with ubuntu server Thanks

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• php startup error Invalid library (maybe not a PHP library) 'pcntl.so'

  - by And-y

  After searching for hours to solve my problem and found nothing helpful I ask my first question here. I want to compile and install php 5.3.17 cli with pcntl extension enabled on a Debian server. The installation was successfull but when I start php cli, the following error is displayed: PHP Warning: PHP Startup: Invalid library (maybe not a PHP library) 'pcntl.so' in Unknown\ on line 0 The following configure is used: './configure' '--prefix=/usr/share' '--datadir=/usr/share/php' '--bindir=/usr/bin' '--libdir=/usr/share' '--includedir=/usr/include' '--with-config-file-path=/etc/php5/cli' '--disable-cgi' '--enable-bcmath' '-- enable-inline-optimization' '--enable-mbstring' '--enable-mbregex' '--enable-pcntl' '--enable-sigchild' '--enable-shmop' '--enable-sysvmsg' '--enable-sysvsem' '--enable-sysvshm' '--with-mysql' '--with-imap' '--with-imap-ssl' '--with-kerberos' In the php.ini following options are set: extension_dir=/usr/lib/php5/20090626/ extension=pcntl.so I hope someone can help me.

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• How to automatically resume php-fpm?

  - by alfish

  I am using nginx+php-fpm on Debian Squeeze for a busy server and have had great difficulty to deal with maximum connections being reached. Here the problem is that php processes sometimes just die randomly under high load and leave the server with no php process. Then I need to manually restart php5-fpm service to bring back the server to life. I am wondering how to avoid this to happen, or at least treat the symptoms by restarting the php5-fpm automatically whenever there is not php process left to listen to incoming requests. My relevant configs are: pm = dynamic pm.max_children = 1400 pm.start_servers = 10 pm.max_spare_servers = 20 pm.process_idle_timeout = 1s; #not sure it will be useful when pm=dynamic pm.max_requests = 100000 request_terminate_timeout = 30 I appreciate your suggestions to cope with this nasty problem.

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• NFSv4 - ACLs not working

  - by alex

  I've setup an NFSv4 server (Debian) and client (Ubuntu/Mythbuntu). It seems that uid username mapping is working nicely out-of-the-box (I get correct usernames on ls -l if the usernames match between the two boxes, even if the uids don't), but ACLs are not working. I've installed nfs4-acl-tools and I can read the ACLs correctly on the client, but they don't get applied. What needs to be done for ACLs to work? To clarify; username mapping works for regular permissions. ACLs are applied using uid/gid (I can even set ACLs by uid and they work).

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• reverse proxy only from one internal server

  - by hrost

  I have configured a reverse proxy and is working ok for one internal server, for example our mail server. Now, I like to know if it is possible to configure a reverse proxy for only one server /application (in this case our web intranet). Our problem is Intranet call another aplication inside same intranet server and another internal servers, and the only way that I know to publish this resources is make a reverse proxy in our dmz apache for all apllications servers, but I like that from our DMZ reverse apache only intranet will be called, and other applications will be called by intranet server, and not reverse proxy. I like to configure with this system for security reason, and only allow external access to one server. I have configured With Debian Squeeze and apache 2.2 It is possible? How?

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• impossible to connect.. days trying..

  - by dany

  I have a problem: I am on Debian. I configured my nic with a static ip (192.168.1.56). When I try to connect to a network, initially with ifconfig eth2 I get (correctly): eth2 inet addr:192.168.1.56 .... inet6 addr: fe80:221:ff:fe96:4598/64 but after a few seconds the 102.168.1.56 disappears and after some other seconds disappears the inet6 address too. When I press in the nm-applet it requires me the password but in the meantime it try to connect. At uni, the connection is a DHCP one. It works for the first few seconds but after it doesn't. Any possible solution? Here it is the relevant part of the syslog: (static ip configuration) http://pastebin.com/u3BPAsda

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• PHP include_path doesn't work

  - by 50ndr33

  I have the documents at http://www.example.com/ in /home/www/example.com/www running on Debian Squeeze. /home/www/example.com/ www/ index.php php/ include_me.php In the php.ini I've uncommented and changed to: include_path =".:/home/www/example.com" In a script index.php in www, I have require_once("/php/include_me.php"). The output I am getting from PHP is: Warning: require_once(/php/include_me.php) [function.require-once]: failed to open stream: No such file or directory in /home/www/example.com/www/index.php on line 2 Fatal error: require_once() [function.require]: Failed opening required '/php/include_me.php' (include_path='.:/home/www/example.com') in /home/www/example.com/www/index.php on line 2 As you can see, the include-path is set correctly according to the error. But if I do require_once("../php/include_me.php");, it works. Therefore, something has to be wrong with the include-path. Does anyone know what I can do to fix it?

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• MRTG: Switch Port Throughput

  - by amazinghorse24

  I currently have MRTG running in a Debian box. It currently polls a Netgear Switch for the speeds of 7 or so ports and then makes the graphs of them. It currently only records the bits/sec. I would like to set up MRTG to record and display the total amount of data that has gone through the port, not just the speed of it. I am somewhat new to MIBS and SNMP and so I need some help. The switch is a Netgear GS748AT and am not quite sure where to find the MIBS for it, or which MIBS I need to accomplish my task. Any and all help is appreciated!

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• How to change password schema for Dovecot user authentication for an already existing mail server

  - by deb_lrnr

  Hello, I have an email server setup on Debian Lenny with Postfix, Dovecot, SASL and MySQL. Currently, the password scheme in my dovecot-sql.conf file is set to: CRYPT default_pass_scheme = CRYPT I would like to globally change the scheme to something stronger like SSHA, or MD5-CRYPT and re-hash all passwords with SSHA. What is the best way to do this? The Dovecot wiki mentions how passwords that don't follow the default scheme defined in dovecot-sql.conf can be prefixed with "{ssha}password", but I couldn't see anything regarding changing an already-existing scheme to a new one for all passwords that are already in the database. Thanks for your help!

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• Recommend a mail server setup for multiple domains

  - by Greg

  Hi all, I've just set up a new Debian web server which I have done plenty of times before, but I want to add a mail server which I have never done before. I am aware of this question, but I would like someone to recommend packages and briefly explain how to use them for providing pop/imap access on multiple domains, a concept that has confused me for a while. I'm planning for this server to grow slowly but surely, from serving an initial 5 or 6 domains to about 20 in the first year, continuing at this rate. (yes, I've jumped on the cloud bandwaggon). At the moment, I have a DNS-A record pointing to my server's IP and nothing else. I'm assuming that I need a DNS-MX record pointing there too, but I haven't read up about it yet so today that's what I'll be doing. Hopefully reading up on the subject and the help that I get here will get my server up and running in no time. Thanks!

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• PHPMyAdmin - Error 500

  - by christian.thomas

  Have scoured the board but can't seem to find anything that's helped yet. If I go to http://localhost/ it's fine, if I go to http://localhost/phpmyadmin I get an 'Error 500: Internal Server Error' There doesn't seem to be anything that'll show up in the log files either. I've tried the RewriteLog as mentioned in PHPMyAdmin 500 Internal Server Error - But that doesn't really seem to help either, nothing gets written to it when I've got: # Logfiles ErrorLog /home/www/beta.**.com/logs/error.log CustomLog /home/www/beta.**.com/logs/access.log combined RewriteLog /home/www/beta.**.com/logs/rewrite.log RewriteLogLevel 9 I've tried uninstalling the package and re-installing it, but that's not helped either. Anyone got any other suggestions? I'm running Debian and Apache 2.

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• Which Linux variant to install on VirtualBox?

  - by Rohit

  Answer to one of my previous post suggested me to use VirtualBox for Sandbox experiments with malware files. I installed VirtualBox and now it demands a bootable CD to install the OS. I want Linux to be installed in it. I guess Debian or Ubuntu are the most popular variant. I want an ISO image that creates a bootable CD or a single DVD with that Linux variant and should include only the basic installation not much features. It should fit in at least 3 or 3.5 GB. Which one is more compatible with VirtualBox?

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• IPtables Traffic Quota - up and down

  - by Nick

  I've been trying to set up traffic quotas for users on a shared server and i believe [with my limited knowledge] that iptables --quota and ports which have been selected for each user [--dport] is the way to do this... iptables -A OUTPUT --dport 1,2,3,4... --quota 123412341234 -j ACCEPT iptables -A OUTPUT --dport 1,2,3,4... -j DROP I think something like this would work to limit the traffic [and reset every month] but its only for traffic going out. Is there something I could do to combine -A OUTPUT and -A INPUT into one quota? Or, is there a different method I could use to achieve the same thing more efficiently? OS is debian squeeze Thanks.

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• Linux - How to completety clean up a software installation

  - by Jonathan Rioux

  Hi, I am running under Debian and I have recently upgraded to Squeeze. Since then, I am having so much problems with Webmin. So I have decided to remove it using: apt-get remove webmin And then I downloaded the sources of Webmin 1.530 and compiled it. But the installation process has been stucked for an hour so I canceled it. I even tried to install it using the .deb file without success (installation stucks for hours). From now, I cannot install Webmin since I uninstalled it. So I would like to know how can I make a full clean up of any traces of Webmin on my server. And then I will retry to install it.

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• rsync doesn't use delta transfer on first run

  - by ockzon

  I'm trying to synchronize a large local directory (with a batch file using rsync 3.0.7 on Cygwin, Windows 7 x64, 30k files, 200gb size) to a remote server (Debian x64 with kernel 2.6, rsyncd 3.0.7) over a slow internet connection (90kbyte/s upload). I know almost all files are identical and I verified that using md5sum locally and remotely. However when executing rsync from my local machine every file gets transferred completely for the first time. When I terminate the batch file after a few transfers and run it again then the already transferred files are skipped. But as soon as it gets to a file not yet transferred it uploads the file as a whole again instead of noticing that the checksum is the same locally and remotely. The batch file calling rsync looks like this (backslashes and line brakes added here for readability): c:\cygwin\bin\rsync.exe --verbose --human-readable --progress --stats \ --recursive --ignore-times --password-file pwd.txt \ /cygdrive/d/ftp/data/ \ rsync://[email protected]:33400/data/ | \ c:\cygwin\bin\tee.exe --append rsync.log I experimented using the following parameters in varying combinations but that didn't help either: --checksum --partial --partial-dir=/tmp/.rsync-partial --compress

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• Where to put unix sockets

  - by James Willson

  I am new to this, so sorry if its obvious. I am running a debian server and installing the likes of UWSGI, NGinx etc on there. The configurations keep talking about pointing to "sockets". In the build options I seem to be able to specify where the sockets for each program go. By default it looks like most of them go in /tmp/ (not all of them). Is this a good place for them to go? Im trying to keep things as organised as possible but just bunging them in my tmp directory doesnt seem like the best option.

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• How do you persist installed software & configurations on an Amazon EC2 instance?

  - by Richard

  I've gotten a base Debian AMI up and running and now I need to know the best way to maintain it. I've ran the updates (aptitude update/upgrade) and installed/configured my software (Apache, Ruby, etc.) but if I reboot the instance or start a new one I'll have to do all this work over again. How do you persist these types of things over a reboot? Do you build a new AMI every time you adjust some tiny piece of the system? Or is there some way to feed it a script on startup that configures it in "real-time"? I know I could go all the way with a Reductive Labs Puppet style setup but that's a bit too much for my needs right now (1-2 servers). Any best practices on this? Update: I found a bit of information on using User-Data to run scripts at instance boot time.

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• Remote desktop to my KVM virtual machine

  - by user6

  I've got a dedicated server running Debian 6. I've set up a windows 7 virtual machine using KVM. Now I'm trying to get Remote desktop working. I'm guessing i have to do some port forwarding. The virtual machine is in a NAT. Remote desktop is already set up on it (another virtual machine can connect). I've tried using the iptables and countless of virsh commands of which I'm not even sure what they did. Anyone knows how to get this working?

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• Rsync over ssh with root access on both sides

  - by Tim Abell

  Hi, I have one older ubuntu server, and one newer debian server and I am migrating data from the old one to the new one. I want to use rsync to transfer data across to make final migration easier and quicker than the equivalent tar/scp/untar process. As an example, I want to sync the home folders one at a time to the new server. This requires root access at both ends as not all files at the source side are world readable and the destination has to be written with correct permissions into /home. I can't figure out how to give rsync root access on both sides. I've seen a few related questions, but none quite match what I'm trying to do. I have sudo set up and working on both servers.

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• DreamPress WordPress site Varnish Cache Error

  - by rhand

  Every now and then, often when I write a post on my Dreamhost DreamPress WordPress blog I get this Varnish related error: Error 503 Service Unavailable Service Unavailable Guru Meditation: XID: 180706672 Varnish cache server I did a related post here Varnish & ISPConfig under Debian give error 503 but they only tell me it could be an Apache Virtual Hosts issue and that the defined hosts should be checked. But that thread was on a different XID and just a comment, not an accepted solution. So perhaps this situation is different. Any ideas?

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• Changing time or offsetting it in OpenVZ contained server

  - by Milad Naseri

  I am trying to run a VPS, a Debian box contained in an OpenVZ container. Obviously, I cannot use time --set or any such command, as the time must be set via the parent node. The owner of the parent node, however refuses to adjust the time (which is 30 minutes slower than the actual time). All the programs on my system, consequently, now recognized the false time and this throws a wrench in my syncing. Is there a way to possibly change the system time without interference from the container's administrator? Or perhaps, failing that, a way to make the programs "see" the time 30 minutes faster than what is reported by the container?

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• Script on startup without update-rc.d

  - by Jean-Philippe Blary

  I've a debian minimal installation, and I just want to start a script at startup. So, I've a script at /etc/init.d/myscript, I put a chmod 700, and create symlinks ('S20myscript') into /etc/rc2.d, rc3.d, rc4.d and rc5.d. But the script is NOT launched at all. When I put this script with update-rc.d (or insserv...), it works. I don't understand, am I forced to use this command? (and no, I don't want to use /erc/rc.local). Thanks!

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• How do I update my servers' domain name for Reverse DNS?

  - by Jeff

  I'm updating my mail servers' rDNS and I think I have it all figured out except for one thing. When I installed my OS (Debian Etch), the installer asked me to enter the "domain name". Is the "domain name" updated by using the hostname command? If so, which config file(s) are updated when using the hostname command? If not, how do I change my servers' domain name? My current /etc/hosts: 127.0.0.1 localhost 67.228.178.164 mrspock.example-old.com mrspock My current /etc/hostname: mrspock $ hostname -f mrspock.example-old.com I need to update hostname -f to be mrspock.example-new.com.

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• IP issue with Heartbeat & DRBD

  - by adam0345

  I'm in the process of setting up 3-node stacked DRBD, and i'm experiencing a rather bizarre issue. Two nodes are located at the data center, and the 3rd node is located locally. The Primary and Secondary nodes are working as expected, however the 3rd node won't connect to the primary. If I ping the IP provided by heartbeat on the 3rd node it will return 100% packet loss, if I reset networking interfaces, ping will then return a few successful packets, but then stop returning any packets. I can't work out any reason why this would be behaving like this. All nodes are running Debian Squeeze, and the latest version of DRBD.

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