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Page reload needed several times before loading normally

- by tim peterson

Sorry my question is so vague I just have no idea where to start in solving it and am quite a novice with servers. Recently my site (an https connection, running on an Amazon EC2 ubuntu apache2.2) has this issue where I need to load the page several times (3-4) before it will load normally without issue. It will then load normally as long as I keep loading pages regularly (every couple seconds). It will stall again if I don't load pages for a few minutes. It has nothing to do with my application because I don't have this problem with the exact same app codebase on my Apache installation on my laptop. The only thing to my knowledge that I changed is that I installed mod_pagespeed https://developers.google.com/speed/pagespeed/mod. However, I have since turned it off by setting my pagespeed.conf to mod_pagespeed off. Unfortunately, that didn't solve the problem. I'm wondering general advice on how to troubleshoot this problem. For instance are there linux commands to check page loading peformance? Also, it looks like I have lots of new error.logs in my /var/log/apache2 directory which i believe weren't there a few months ago. lots of this : error.log RewriteLog.log.24.gz ssl_access.log.40.gz error.log.1 RewriteLog.log.25.gz ssl_access.log.41.gz error.log.10.gz RewriteLog.log.26.gz ssl_access.log.42.gz error.log.11.gz RewriteLog.log.27.gz any thoughts? thank you, tim

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VSFTP Users and Directories

- by Mathew

I'm stuck. I've been working all day on trying to figure out what I'm doing wrong and I've hit wall after wall. What I'm trying to do: Setup FTP in such a way that certain users have access only to their directory, but higher level users have access to all directories. What I've Googled so far: I started with this, but that didn't do what I needed it to. I then used this, but once I created one user, it wouldn't let me create another one. Finally, I decided to follow this, but it wouldn't let me even create one user. I'm using Ubuntu 10. I can login to ftp as a root user and it takes me to the home directory. If I try to login using the user I created in the tutorial it says: Status: Connection established, waiting for welcome message... Response: 220 (vsFTPd 2.2.2) Command: USER mathew Response: 331 Please specify the password. Command: PASS **** Response: 530 Login incorrect. Error: Critical error Error: Could not connect to server

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VSFTPD does not allow upload with virtual users

- by Mr. Squig

I am attempting to setup VSFTPD with virtual users on a server running Ubuntu 12.04. I have configured the server to allow for virtual users to login, but I am having trouble getting it to allow uploads. My vsftpd.conf is as follows: listen=YES anonymous_enable=NO local_enable=YES write_enable=YES local_umask=022 anon_upload_enable=YES dirmessage_enable=YES use_localtime=YES xferlog_enable=YES connect_from_port_20=YES chroot_local_user=YES virtual_use_local_privs=YES guest_enable=YES guest_username=virtual user_sub_token=$USER local_root=/var/www/$USER hide_ids=YES secure_chroot_dir=/var/run/vsftpd/empty pam_service_name=vsftpd rsa_cert_file=/etc/ssl/private/vsftpd.pem /etc/pam.d/vsftpd contains: auth required pam_pwdfile.so pwdfile /etc/vsftpd.passwd crypt=hash account required pam_permit.so crypt=hash I have two virtual users set up, one of which has the same name as a local user. They each have a directory in /var/www/ owned by 'virtual'. As I understand it, when a virtual user logs in this way they will appear to the system as the user virtual. Using this configuration user can log on, but cannot upload files. The error given in /var/log/vsftpd.log is: Tue Nov 20 19:49:00 2012 [pid 2] CONNECT: Client "96.233.116.53" Tue Nov 20 19:49:07 2012 [pid 1] [zac] OK LOGIN: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 2] CONNECT: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 1] [zac] OK LOGIN: Client "96.233.116.53" Tue Nov 20 19:49:11 2012 [pid 3] [zac] FAIL CHMOD: Client "96.233.116.53", "/test.ppm 644" I have tried changing the permissions of these directories in all sorts of ways, but nothing seem to work. I have a feeling that it is something simple related to permissions. Any ideas?

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Running Mathematica-5 remotely

- by oxinabox.ucc.asn.au

I have Mathematica 5 - a powerful CAS. I have a cheap netbook (running Windows XP), wich not only is too slow to run mathmatica on, I doubt it has the harddrive space. I do however have remote access to a number of very powerful computers, (most of wich run variose Linuxes, but one of which is Windows Server 2008, though I'ld rather not use this one*). Mostly over SSH but other protocols can be arraged for some, I'm sure. So I'ld like to install Mathematica onto one of these machine and then run it remotely. Either from the command line via Putty or via some other method. I glanced through the mathematical documentation and read something about using some MathLink program, which links the front end installed on my computer to a remote kernel. Anyone have any experience with this? I'm not sure if this belongs here or in SuperUser. At the moment, it's being tinkered with, and when the tinkering stops it'll likely be used to run multiple thin terms. As compared to the Linux machines: I have access to a dual 2.4 Xeon with 3GB RAM, which the rest of the world seems to have completely forgotten about (runs freeBSD!).

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Resizing a LUKS encrypted volume

- by mgorven

I have a 500GiB ext4 filesystem on top of LUKS on top of an LVM LV. I want to resize the LV to 100GiB. I know how to resize ext4 on top of an LVM LV, but how do I deal with the LUKS volume? mgorven@moab:~% sudo lvdisplay /dev/moab/backup --- Logical volume --- LV Name /dev/moab/backup VG Name moab LV UUID nQ3z1J-Pemd-uTEB-fazN-yEux-nOxP-QQair5 LV Write Access read/write LV Status available # open 1 LV Size 500.00 GiB Current LE 128000 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 2048 Block device 252:3 mgorven@moab:~% sudo cryptsetup status backup /dev/mapper/backup is active and is in use. type: LUKS1 cipher: aes-cbc-essiv:sha256 keysize: 256 bits device: /dev/mapper/moab-backup offset: 3072 sectors size: 1048572928 sectors mode: read/write mgorven@moab:~% sudo tune2fs -l /dev/mapper/backup tune2fs 1.42 (29-Nov-2011) Filesystem volume name: backup Last mounted on: /srv/backup Filesystem UUID: 63877e0e-0549-4c73-8535-b7a81eb363ed Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: (none) Filesystem state: clean with errors Errors behavior: Continue Filesystem OS type: Linux Inode count: 32768000 Block count: 131071616 Reserved block count: 0 Free blocks: 112894078 Free inodes: 32044830 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 992 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 RAID stride: 128 RAID stripe width: 128 Flex block group size: 16 Filesystem created: Sun Mar 11 19:24:53 2012 Last mount time: Sat May 19 13:29:27 2012 Last write time: Fri Jun 1 11:07:22 2012 Mount count: 0 Maximum mount count: 100 Last checked: Fri Jun 1 11:03:50 2012 Check interval: 31104000 (12 months) Next check after: Mon May 27 11:03:50 2013 Lifetime writes: 118 GB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: 383bcbc5-fde9-4720-b98e-2d6224713ecf Journal backup: inode blocks

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How do I effectively use WinSCP on my GoDaddy Dedicated Hosting

- by Scott

After being told that Virtual Private Servers would not fit the scope of my project, I have timidly entered the world of dedicated hosting. Unfortunately, this is forcing me how to learn the basics of being a Linux server admin. GoDaddy has a master account for the server. When you use SSH, they want you to use "su" to switch to the root user. Thus far, I have been able to do everything I have needed to thus far via the command line as this root user. However, now I need to upload files to my server. I'm used to using WinSCP to upload files. I can use my general server account to view the files but when I try to drag or create files its says that I cannot because I do not have permission to do so. I have researched the WinSCP documentation and it seems that this "su" function is beyond the scope of the program. How am I to grant myself access to upload these files using SSH? Should I create a user with the proper permissions? I'm happy to do this but thus far I have not been able to make sense of what I have found online. I'm going to try and move forward but any help and/or insight is appreciated.

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Unable to access Windows share

- by mbnoimi

I've installed Alfresco 4.2.d under Ubuntu 12.04 LTS; Everything done fine except I can't access it from Windows share although I got the link from Alfresco explorer which is: file:///%5C%5CECSA%5CAlfresco%5CSites%5Cswsdp%5CdocumentLibrary%5CAgency%20Files%5CImages%5Ccoins.JPG I tried to access it from: \\ECSA but I failed too so I made a ping (192.168.0.70 is server IP) then I got: C:\Users\user>ping 192.168.0.70 Pinging 192.168.0.70 with 32 bytes of data: Reply from 192.168.0.70: bytes=32 time<1ms TTL=64 Reply from 192.168.0.70: bytes=32 time<1ms TTL=64 Reply from 192.168.0.70: bytes=32 time<1ms TTL=64 Reply from 192.168.0.70: bytes=32 time<1ms TTL=64 Ping statistics for 192.168.0.70: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 0ms, Maximum = 0ms, Average = 0ms C:\Users\user>ping ECSA Ping request could not find host ECSA. Please check the name and try C:\Users\user> Some logs of what's going on: C:\Users\user>net view ECSA System error 1707 has occurred. The network address is invalid. C:\Users\user>nbtstat -a 192.168.0.70 Local Area Connection: Node IpAddress: [192.168.0.84] Scope Id: [] NetBIOS Remote Machine Name Table Name Type Status --------------------------------------------- ECSA <20> UNIQUE Registered ECSA <00> UNIQUE Registered WORKGROUP <00> GROUP Registered MAC Address = 00-00-00-00-00-00 C:\Users\user> CIFS Server Configuration in file-servers.properties ### CIFS Server Configuration - file-servers.properties ### cifs.enabled=true cifs.serverName=${localname}A cifs.domain= cifs.broadcast=255.255.255.255 cifs.bindto=192.168.0.70 cifs.ipv6.enabled=false cifs.hostannounce=true cifs.disableNIO=false cifs.disableNativeCode=false cifs.sessionTimeout=900 cifs.maximumVirtualCircuitsPerSession=16 cifs.tcpipSMB.port=445 cifs.netBIOSSMB.sessionPort=139 cifs.netBIOSSMB.namePort=137 cifs.netBIOSSMB.datagramPort=138 cifs.WINS.autoDetectEnabled=true cifs.WINS.primary=192.168.0.70 cifs.WINS.secondary=192.168.0.1 cifs.sessionDebug= cifs.pseudoFiles.enabled=true cifs.pseudoFiles.explorerURL.enabled=true cifs.pseudoFiles.explorerURL.fileName=__Alfresco.url cifs.pseudoFiles.shareURL.enabled=false cifs.pseudoFiles.shareURL.fileName=__Share.url How can I fix this issue?

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What is the advantage of not running as root? [closed]

- by Shmuel Brill

Possible Duplicate: What's wrong with always being root? All modern brands of Linux highly discourage (or disable) one from running as root instead of a normal user. I do not understand why. As a "normal" user, one could Download a rouge program from the internet. Run it (After all, one isn't root, what can it do). It installs itself in .bashrc or .xinitrc It writes a rouge "sudo" and "su" and adds . to the path Not noticing that . is in path, one runs sudo. The rouge program now has root password and can do anything it wants in the system. Even if 3-6 doesn't happen, the program could still Be part of a botnet. Read all files in the home directory and send them back (mine for SS#, Credit Card numbers, bank account numbers, etc). Send spam. Run a backdoor server to allow an attacker a chance to connect to the machine to determine vulnerabilities. It seems that the whole "permissions" thing (root/non-root) is just to prevent amateur crackers from getting into the system, so the question is: Is there a point in avoiding running as root, and is there a way to protect oneself if one wants to run unsafe code?

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saslauthd authentication error

- by James

My server has developed an expected problem where I am unable to connect from a mail client. I've looked at the server logs and the only thing that looks to identify a problem are events like the following: Nov 23 18:32:43 hig3 dovecot: imap-login: Login: user=, method=PLAIN, rip=xxxxxxxx, lip=xxxxxxx, TLS Nov 23 18:32:55 hig3 postfix/smtpd[11653]: connect from xxxxxxx.co.uk[xxxxxxx] Nov 23 18:32:55 hig3 postfix/smtpd[11653]: warning: SASL authentication failure: cannot connect to saslauthd server: No such file or directory Nov 23 18:32:55 hig3 postfix/smtpd[11653]: warning: xxxxxxx.co.uk[xxxxxxxx]: SASL LOGIN authentication failed: generic failure Nov 23 18:32:56 hig3 postfix/smtpd[11653]: lost connection after AUTH from xxxxxxx.co.uk[xxxxxxx] Nov 23 18:32:56 hig3 postfix/smtpd[11653]: disconnect from xxxxxxx.co.uk[xxxxxxx] The problem is unusual, because just half an hour previously at my office, I was not being prompted for a correct username and password in my mail client. I haven't made any changes to the server, so I can't understand what would have happened to make this error occur. Searches for the error messages yield various results, with 'fixes' that I'm uncertain of (obviously don't want to make it worse or fix something that isn't broken). When I run testsaslauthd -u xxxxx -p xxxxxx I also get the following result: connect() : No such file or directory But when I run testsaslauthd -u xxxxx -p xxxxxx -f /var/spool/postfix/var/run/saslauthd/mux -s smtp I get: 0: OK "Success." I found those commands on another forum and am not entirely sure what they mean, but I'm hoping they might give an indication of where the problem might lie. If it makes any difference, I'm running Ubuntu 10.04.1, Postfix 2.7.0 and Webmin/ Virtualmin.

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How to upgrade Apache 2 from 2.2 to 2.4

- by Nina

I was in the process of doing a test upgrade from Apache 2.2 to 2.4.3. I'm using Ubuntu 10.04. I would have upgraded to 12.04 for this to see if the upgrade would go a lot smoother. Unfortunately, I was told it wasn't an option...so I'm stuck using 10.04. The process I did this was: Before attempting this, I have managed to upgrade APR from 1.3 to 1.4 as well since apache told me it was a requirement beforehand: http://apr.apache.org/download.cgi First remove all traces of the current apache: sudo apt-get --purge remove apache2 sudo apt-get remove apache2-common apache2-utils apache2.2-bin apache2-common sudo apt-get autoremove whereis apache2 sudo rm -Rf /etc/apache2 /usr/lib/apache2 /usr/include/apache2 Afterwards, I did the following: sudo apt-get install build-essential sudo apt-get build-dep apache2 Then install apache 2.4 with the following: wget http://apache.mirrors.tds.net//httpd/httpd-2.4.3.tar.gz tar -xzvf httpd-2.4.3.tar.gz && cd httpd-2.4.3 sudo ./configure --prefix=/usr/local/apache2 --with-apr=/usr/local/apr --enable-mods-shared=all --enable-deflate --enable-proxy --enable-proxy-balancer --enable-proxy-http --with-mpm=prefork sudo make sudo make install After the make install, I ended up getting a series of errors that prevented it from installing correctly: exports.c:2513: error: redefinition of 'ap_hack_apr_uid_current' exports.c:1838: note: previous definition of 'ap_hack_apr_uid_current' was here exports.c:2514: error: redefinition of 'ap_hack_apr_uid_name_get' exports.c:1839: note: previous definition of 'ap_hack_apr_uid_name_get' was here exports.c:2515: error: redefinition of 'ap_hack_apr_uid_get' exports.c:1840: note: previous definition of 'ap_hack_apr_uid_get' was here exports.c:2516: error: redefinition of 'ap_hack_apr_uid_homepath_get' Looking for exports.c only leads me back to the httpd-2.4.3 folder. So I'm not sure what these errors mean... Thanks in advance for any help you have to offer!

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nginx does not use variables set in /etc/environment on system reboot, but does when restarted from shell

- by Dave Nolan

I have a Rails app running on nginx/passenger. It restarts happily in a shell using sudo /etc/init.d/nginx stop|start|restart. But Passenger throws an error when the system is rebooted: "Missing the Rails #{version} gem". But GEM_HOME and GEM_PATH are both set in /etc/environment so surely they would be available to all processes during reboot? /etc/environment PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11:/usr/games" GEM_HOME=/var/lib/gems/1.8 GEM_PATH=/var/lib/gems/1.8 /etc/init.d/nginx #! /bin/sh ### BEGIN INIT INFO # Provides: nginx # Required-Start: $all # Required-Stop: $all # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: starts the nginx web server # Description: starts nginx using start-stop-daemon ### END INIT INFO PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin DAEMON=/opt/nginx/sbin/nginx NAME=nginx DESC=nginx test -x $DAEMON || exit 0 # Include nginx defaults if available if [ -f /etc/default/nginx ] ; then . /etc/default/nginx fi set -e case "$1" in start) echo -n "Starting $DESC: " start-stop-daemon --start --quiet --pidfile /var/log/nginx/$NAME.pid \ --exec $DAEMON -- $DAEMON_OPTS echo "$NAME." ;; stop) echo -n "Stopping $DESC: " start-stop-daemon --stop --quiet --pidfile /var/log/nginx/$NAME.pid \ --exec $DAEMON echo "$NAME." ;; restart|force-reload) echo -n "Restarting $DESC: " start-stop-daemon --stop --quiet --pidfile \ /var/log/nginx/$NAME.pid --exec $DAEMON sleep 1 start-stop-daemon --start --quiet --pidfile \ /var/log/nginx/$NAME.pid --exec $DAEMON -- $DAEMON_OPTS echo "$NAME." ;; reload) echo -n "Reloading $DESC configuration: " start-stop-daemon --stop --signal HUP --quiet --pidfile /var/log/nginx/$NAME.pid \ --exec $DAEMON echo "$NAME." ;; *) N=/etc/init.d/$NAME echo "Usage: $N {start|stop|restart|force-reload}" >&2 exit 1 ;; esac exit 0 $ opt/nginx/sbin/nginx -v nginx version: nginx/0.7.67 Ubuntu lucid

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ERROR with rpm_check_debug vs depsolve

- by Frank Thornton

Transaction Summary ========================================================================================================================================================== Install 9 Package(s) Upgrade 227 Package(s) Remove 1 Package(s) Total size: 252 M Downloading Packages: Running rpm_check_debug ERROR with rpm_check_debug vs depsolve: libasound.so.2()(64bit) is needed by libgcj-4.4.7-4.el6.x86_64 libasound.so.2(ALSA_0.9)(64bit) is needed by libgcj-4.4.7-4.el6.x86_64 ** Found 15 pre-existing rpmdb problem(s), 'yum check' output follows: alsa-lib-devel-1.0.22-3.el6.x86_64 has missing requires of alsa-lib = ('0', '1.0.22', '3.el6') alsa-lib-devel-1.0.22-3.el6.x86_64 has missing requires of libasound.so.2()(64bit) alsa-utils-1.0.22-5.el6.x86_64 has missing requires of libasound.so.2()(64bit) alsa-utils-1.0.22-5.el6.x86_64 has missing requires of libasound.so.2(ALSA_0.9)(64bit) alsa-utils-1.0.22-5.el6.x86_64 has missing requires of libasound.so.2(ALSA_0.9.0rc4)(64bit) alsa-utils-1.0.22-5.el6.x86_64 has missing requires of libasound.so.2(ALSA_0.9.0rc8)(64bit) frontpage-2002-SR1.2.i386 has missing requires of libexpat.so.0 gstreamer-plugins-base-0.10.29-2.el6.x86_64 has missing requires of libasound.so.2()(64bit) gstreamer-plugins-base-0.10.29-2.el6.x86_64 has missing requires of libasound.so.2(ALSA_0.9)(64bit) gstreamer-plugins-base-0.10.29-2.el6.x86_64 has missing requires of libasound.so.2(ALSA_0.9.0rc4)(64bit) libgcj-4.4.7-3.el6.x86_64 has missing requires of libasound.so.2()(64bit) libgcj-4.4.7-3.el6.x86_64 has missing requires of libasound.so.2(ALSA_0.9)(64bit) 1:qt-x11-4.6.2-26.el6_4.x86_64 has missing requires of libasound.so.2()(64bit) 1:qt-x11-4.6.2-26.el6_4.x86_64 has missing requires of libasound.so.2(ALSA_0.9)(64bit) 1:qt-x11-4.6.2-26.el6_4.x86_64 has missing requires of libasound.so.2(ALSA_0.9.0rc4)(64bit) Your transaction was saved, rerun it with: yum load-transaction /tmp/yum_save_tx-2013-12-23-22-364infzT.yumtx root@www1 [~]# I did some research and this is due to a 32bit binary trying to install itself or broken repo? root@www1 [~]# yum repolist Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile * base: centos.mirror.lstn.net * extras: mirror.ash.fastserv.com * updates: ftp.usf.edu repo id repo name status base CentOS-6 - Base 6,284+83 dag Dag RPM Repository for Red Hat Enterprise Linux 4,559+91 extras CentOS-6 - Extras 14 updates CentOS-6 - Updates 247+39 repolist: 11,104 Now I disabled epel and rpmforge repops and still ended up with the same issues. Ideas?

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Fix stubborn 'Setting locale failed.'

- by plua

I have a very stubborn, well-known locale error on Ubuntu 9.10: perl: warning: Setting locale failed. perl: warning: Please check that your locale settings: LANGUAGE = (unset), LC_ALL = (unset), LC_TIME = "custom.UTF-8", LANG = "en_US.UTF-8" Tried the following: Added LANG=en_US.UTF-8 and LC_ALL=en_US.UTF-8 to /etc/environment Run apt-get install --reinstall locales (error: perl: warning: Falling back to the standard locale ("C"). /usr/bin/mandb: can't set the locale; make sure $LC_* and $LANG are correct) Run sudo dpkg-reconfigure locales. Result: Cannot set LC_ALL to default locale: No such file or directory, and then updates locales all locales including en_US.UTF-8 sudo locale-gen updates all locales successfully, including en_US.UTF-8 sudo locale-gen un_US en_US.UTF-8 gives no error nor other output In /etc/default/locale it says LANG="en_US.UTF-8" echo $LANG gives en_US.UTF-8 /var/lib/locales/supported.d/local says en_US.UTF-8 UTF-8 locale -a gives me: C en_AG en_AU.utf8 en_BW.utf8 en_CA.utf8 en_DK.utf8 en_GB.utf8 en_HK.utf8 en_IE.utf8 en_IN en_NG en_NZ.utf8 en_PH.utf8 en_SG.utf8 en_US.utf8 en_ZA.utf8 en_ZW.utf8 POSIX So well... I am pretty much out of options I can think of. Anybody any idea?? Thanks!

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Commandline program to extract archives with automatic subdirectry detection

- by ??????

The title already says it. What I'm looking for is essentially the pure commandline counterpart to ark -ba <path> (on KDE), or file-roller -h <path> (on GNOME/Unity). Unfortunately, both ark and file-roller require X to be running. I'm aware that it is relatively simple to write a tool that detects archives based on their file extension, and then runs the appropiate program: #!/bin/bash if [[ -f "$1" ]] ; then case $1 in *.tar.bz2) tar xjvf $1 ;; *.tar.gz) tar xzvf $1 ;; *.bz2) bunzip2 $1 ;; *.rar) rar x $1 ;; *.gz) gunzip $1 ;; *.tar) tar xf $1 ;; *.tbz2) tar xjvf $1 ;; *.tgz) tar xzvf $1 ;; *.zip) unzip $1 ;; *.Z) uncompress $1 ;; *.7z) 7z x $1 ;; *) echo "'$1' cannot be extracted with this utility" ;; esac else echo "path '$1' does not exist or is not a file" fi However, that doesn't take care of subdirectory detection (and in fact, many extraction programs do not even supply such an option). So might there be a program that does exactly that? I wasn't sure whether or not to ask on askubuntu.com, because this question isn't really about Ubuntu, but rather about any Linux operating system. My apologies if this question does not fit in here.

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Migrate installation from one HDD to another?

- by dougoftheabaci

I have a server with a 64 GB SSD inside. It runs just fine, but occasionally there's a hiccup that causes it to nearly fill up. When that happens my server starts to lockup and generally misbehave. I'm looking to buy a bigger SSD (either 128 GB or 256 GB) but I'm a bit unsure of how best to make the transition. For a start, I don't have an external monitor. If I need one I'll have to borrow it from work. Most of the time I just SSH into the server from my iMac. The only solution I can think of would be to buy two FW800 2.5" cases, boot from the 64 GB SSD and clone it to the 128 GB SSD. Seem a bit excessive but it might be my best option. I do have more than one SATA port on my server, but they're all currently being use for storage drives. They don't mount by default, so I could unplug them and just have the two SSDs and do the whole thing via SSH. This is another option I'm considering. My main concern with either is how best to make sure everything goes across. I want a carbon copy of the first one onto the second. This is especially important because I have a ZFS volume (my storage) and I'm a bit unfamiliar with how to move everything across. I could just start fresh and reinstall everything on the SSD, but that seems like extra trouble I don't need. So any advice on how best to achieve my goals would be appreciated. Thanks! Server is running Ubuntu Server 12.04. The iMac has 10.8.1.

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iPhone Remote with iTunes Library via VPN

- by sudo work

Alright, so I'm currently behind a network router (not under my control). The router performs NAT and somehow prevents a computer from scanning other nodes. At least, you're unable, in this instance, to locate an iTunes library. You can, however, communicate with a node's open ports if the local IP address is known, as well as the port. I haven't actually tried port scanning a specific IP using nmap or another tool yet. So I've tried one solution to remove the contribution of the router entirely (to verify that it works without the influence of the routers). I set up an access point using my iPhone and tethered my computer (with the library) to it. From here, I was able to pair my library and the iPhone Remote application. Control of the library was normal as well. This solution is not ideal, however, because I am actively using bandwidth with my computer and cannot afford to be tethered to my 3G connection. A viable solution for me is to use a common VPN connection, which I have set up on a Ubuntu (Intrepid) server that is remote. Both my computer and iPhone are able to access the VPN via PPTP. The server is setup with PPTPD as the VPN-server; I'm using IPTables to perform IP masquerading and forwarding traffic. I however, still cannot connect the library to the phone. I can however, see both devices on the VPN subnet (192.168.0.0/24). SSH'ing and such works fine. What settings on the VPN server must I change to get this to work? Also, how can I assign static IP addresses to various PPTP clients based on MAC addresses?

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Mplayer no sound when playing some movies

- by Ivan Peevski

Ok, that's a bit of a strange problem, that somehow crept into my system. It used to work fine. Here is the problem as far as I can identify it. When I try to play certain video files with mplayer, there is no sound. As far as I can tell, it is only an issue with ac3 and dts sound tracks (using the ffmpeg decoder). Mplayer says: ========================================================================== Opening audio decoder: [ffmpeg] FFmpeg/libavcodec audio decoders AUDIO: 48000 Hz, 6 ch, s16le, 1536.0 kbit/33.33% (ratio: 192000->576000) Selected audio codec: [ffdca] afm: ffmpeg (FFmpeg DTS) ========================================================================== [AO_ALSA] Playback open error: Device or resource busy Failed to initialize audio driver 'alsa' Could not open/initialize audio device -> no sound. Audio: no sound (similar with ac3 sound, but using the ffac3 audio codec). Trying different audio output (-ao oss/pcm/sdl) doesn't fix the problem. The strange thing is that if I play these files directly with ffplay, they work fine. mplayer sound with mp3/ogg is fine My alsa configuration is standard (no /etc/asound.conf or ~/.asound*) OS: Linux Gentoo Mplayer: 1.0_rc4_p20100213 (SVN-r30554-4.3.4) FFMpeg: 0.5_p20601-r1 (SVN-r20601) Any other information I can provide?

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What's hogging my CPU?

- by endolith

Ubuntu's System Monitor applet shows 100% CPU usage continuously. If I click it, the resources tab shows it at 100% continuously, too. If I go to processes, though, to find out which process is the culprit, there is nothing above 10%. If I run top there is nothing above 10%. I try killing lots of things, but it continues at 100%. How can I find out what's hogging the CPU? This is an unusual situation on a computer I use daily, that normally only hits 100% CPU when I'm doing something that requires it (like loading 32 Firefox tabs) after which it goes back to a normal idle level. It's not a new install or anything. It shouldn't be maxed out. I'm not sure when it started or if I changed something that caused it to happen. Normally I would use top or System Monitor and find the process that had gone out of control, but I can't find anything with those tools this time. It persists after reboots and everything. And the processor is obviously hot, so it's not an erroneous reading. Update: I tried killing any process I saw active again, and killing vino-server finally fixed the problem, even though it never went above 5%. I had enabled Remote Desktop a few days ago (and have obviously now disabled it). How did it manage to use 100% CPU while top only showed it as 5% or so? How do I identify the culprit in the future? Looks like I'm not the only one: Still a problem in both jaunty & karmic. Interestingly, both System Monitor & htop do not show the sum of individual processes being anywhere near 100% cpu.

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Swap space maxing out - JVM dying

- by travega

I have a server running 3 WordPress instances, MySql, Apache and the play framework 2.0 on 64m initial & max heap. If I increase the max heap of the JVM that play is running in even by 16m I see the 128m of swap space steadily fill up until the the JVM dies. I notice that it is only when I am plugging away at the wordpress sites that the JVM will die. I assume this is because the JVM is not asking for memory at the time so gets collected. I notice that when I restart Apache I reclaim about half of my swap and RAM. So is there some way I can configure apache to consume less memory? Also what could be causing the swap space to get so heavily thrashed with just 16m added to the max heap size of the JVM? Server running: Ubuntu 12.04 RAM: 408m Swap: 128m Apache mods: alias.conf alias.load auth_basic.load authn_file.load authz_default.load authz_groupfile.load authz_host.load authz_user.load autoindex.conf autoindex.load cgi.load deflate.conf deflate.load dir.conf dir.load env.load mime.conf mime.load negotiation.conf negotiation.load php5.conf php5.load proxy_ajp.load proxy_balancer.conf proxy_balancer.load proxy.conf proxy_connect.load proxy_ftp.conf proxy_ftp.load proxy_http.load proxy.load reqtimeout.conf reqtimeout.load rewrite.load setenvif.conf setenvif.load status.conf status.load

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ProFTPD / PAM issues with new centos/virtualmin install

- by iamthewit

I just installed CentOS 5.4 on a rackspace cloud server and installed virtualmin which all seemed to go fine. The only problem I have is that I can not access the virtual servers directories via FTP. I get the following from filezilla: Status: Connecting to 1.1.1.1:21... Status: Connection established, waiting for welcome message... Response: 220 FTP Server ready. Command: USER username Response: 331 Password required for username. Command: PASS *************** Response: 230 User username logged in. Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/" is current directory. Command: TYPE I Response: 200 Type set to I Command: PASV Response: 227 Entering Passive Mode (1,1,1,1,216,214) Command: LIST Error: Connection timed out Error: Failed to retrieve directory listing and I get this from my /var/secure/log file Sep 22 19:40:42 stickeeserver proftpd: pam_unix(proftpd:session): session opened for user username by (uid=0) Sep 22 19:40:42 server proftpd[14051]: 94.136.40.82 (::ffff:217.207.31.60[::ffff:217.207.31.60]) - USER nastypasty: Login successful. Sep 22 19:40:42 server proftpd[14051]: 94.136.40.82 (::ffff:217.207.31.60[::ffff:217.207.31.60]) - Preparing to chroot to directory '/home/username' Sep 22 19:40:42 server proftpd[14051]: 94.136.40.82 (::ffff:217.207.31.60[::ffff:217.207.31.60]) - mod_delay/0.5: delaying for 728 usecs Sep 22 19:40:42 server proftpd[14051]: 94.136.40.82 (::ffff:217.207.31.60[::ffff:217.207.31.60]) - error setting IPV6_V6ONLY: Protocol not available Any help would be greatly appreciated, I'm not totally new to Linux but it's not my strongest subject. I do like to know exactly why problems occur though and how exactly to fix them so the more detail the better! cheers

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Resize Debian in VirtualBox

- by Poni

I have a VM with one HD of size 3GB and I'd like to enlarge its HD to 7GB. So I execute this command on the host (while guest is shutdown): VBoxManage modifyhd debian.vdi --resize 7168 Then I run the guest, Debian 6, and then: smith@debian6:~$ df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 2.8G 2.6G 60M 98% / tmpfs 61M 0 61M 0% /lib/init/rw udev 57M 160K 57M 1% /dev tmpfs 61M 0 61M 0% /dev/shm smith@debian6:~$ sudo parted /dev/sda print Model: ATA VBOX HARDDISK (scsi) Disk /dev/sda: 3221MB Sector size (logical/physical): 512B/512B Partition Table: msdos Number Start End Size Type File system Flags 1 1049kB 3035MB 3034MB primary ext3 boot 2 3036MB 3220MB 185MB extended 5 3036MB 3220MB 185MB logical linux-swap(v1) smith@debian6:~$ cat /proc/partitions major minor #blocks name 8 0 3145728 sda 8 1 2962432 sda1 8 2 1 sda2 8 5 180224 sda5 So, no automatic resizing (detection) of the HD/partition (while VirtualBox, in the host, shows it's 7GB now). Ok... Then I do: smith@debian6:~$ sudo resize2fs /dev/sda1 resize2fs 1.41.12 (17-May-2010) The filesystem is already 740608 blocks long. Nothing to do! smith@debian6:~$ sudo parted GNU Parted 2.3 Using /dev/sda Welcome to GNU Parted! Type 'help' to view a list of commands. (parted) select /dev/sda1 Using /dev/sda1 (parted) resize WARNING: you are attempting to use parted to operate on (resize) a file system. parted's file system manipulation code is not as robust as what you'll find in dedicated, file-system-specific packages like e2fsprogs. We recommend you use parted only to manipulate partition tables, whenever possible. Support for performing most operations on most types of file systems will be removed in an upcoming release. Partition number? 1 Start? 0 End? [3034MB]? Here I'm stuck. At the above parted it asks me to resize to 3GB. No point in that, right.. What should I do in order to enlarge this partition?

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Postfix character encoding?

- by Anonymous12345

I use Postfix as a mailserver. I have Ubuntu OS. Then I use PHP to send emails. Problem is that none of my emails are encoded properly by a mailsoftware which my VPS provider uses. According to them, the problem lies with me. It is only the name field which isn't encoded properly. For example "Björn" becomes "BjÃ¶rn" in my emails. However, when I echo the $name, it outputs "Björn" which is correct. Also, gmail and hotmail does show it correctly. The strange part is that the "text" (the message itself) is encoded properly. I use the following for sending mail: $headers="MIME-Version: 1.0"."\n"; $headers.="Content-type: text/plain; charset=UTF-8"."\n"; $headers.="From: $name <$email>"."\n"; $name= iconv(mb_detect_encoding($name), "UTF-8//IGNORE//TRANSLIT", $name); //// I HAVE TRIED WITH AND WITHOUT THE LINE ABOVE, NO DIFFERENCE mail($to, '=?UTF-8?B?'.base64_encode($subject).'?=', $text, $headers, '[email protected]'); I have tried with and without the iconv line also, no luck. The last thing I can think of is POSTFIX, could there be a setting for character encoding there? Anybody knows?

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How to fix a Postfix/MySQL/Dovecot Unknown Host Issue?

- by thiesdiggity

I am having an issue with one of my Postfix/Dovecot mail servers and I'm unsure how to fix the problem. I will try to explain it in detail, here it goes: I have an Ubuntu server setup using Virtual hosting with Postfix, Dovecot and MySQL. We have one domain setup as a virtual domain, for this example I am going to use mail.example.com. Under that domain we have one email address. I have another server (MS Exchange) setup using another one of my sub-domains, ex.example.com. The problem is that when I SMTP into the account on mail.example.com and try to send an email to an account on ex.example.com, I get the email returned back to us with an "unknown host" error. Now, I know that the mail.example.com server can resolve the ex.example.com domain because I can ping/dig while SSH'd into it. I can also log into Postfix via Telnet and send an email to an ex.example.com mailbox. I'm guessing that it has something to do with Postfix/Dovecot looking locally for the domain in the virtual domain list because of the tld domain (example.com)? If that's the case, how do I get Postfix/Dovecot to only look locally for the entire URL (mail.example.com) and if it doesn't find it, send it to the correct server by looking up the MX/A records (which I know exist and are setup correctly)? I have been working on this all day and any guidance would be GREATLY appreciated! Thanks for your time!

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System hangs while rebooting on Debian...

- by Usman

Hi, I have Debian (Kernel 2.6.26-2-686) installed on two computers. On one of them it reboots quite finely but I am having following problem with rebooting Debian on my second computer. When i type reboot at the Linux prompt, following messages appear and system hangs up after saying "Restarting System": Broadcast message from root@myname (tty1) (Sun Jan 17 11:23:26 2010) The system is going down for reboot NOW! INIT: Switching to runlevel: 6 INIT: Sending processes the TERM signal Saving system clock Stopping enhanced syslog: rsyslogd. Asking all remaining processes to terminate...done. Deconfiguring network interfaces...done. Cleaning up ifupdown.... Deactivating swap...done. [ 31.789103] Restarting System. _ Normally when the sytem is busy "" sign blinks but "" at the last line above does not blink which shows, the system hanged up. I tried all keys but the screen is still frozen at the same point. The difference that I noted between my two computers is that I don't have ACPI support in the BIOS of the system which is giving me this error whereas the BIOS of my first computer do have ACPI support on which Debain do not give this restart-hanging problem. I have also disabled running the acpid script by running update-rc.d -f acpid remove but the problem still persists on the second computer. Any ideas to solve or get around this problem?

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Apache to read from /home/user/public_html on CentOS 5.7

- by C.S.Putra

this is my first experience using CentOS 5.7 / Linux as my web server OS and I have just finished installing Apache. Then I created a new account using WHM. The account is now created and the domain name can be accessed. I have put the web files under /home/user/public_html/ but when I access the domain assigned for that user which I assigned when creating new account in WHM, it doesn't read the files. In /usr/local/apache/conf/httpd.conf : <VirtualHost 175.103.48.66:80> ServerName domain.com ServerAlias www.domain.com DocumentRoot /home/user/public_html ServerAdmin [email protected] User veevou # Needed for Cpanel::ApacheConf <IfModule mod_suphp.c> suPHP_UserGroup group1 group1 </IfModule> <IfModule !mod_disable_suexec.c> SuexecUserGroup group1 group1 </IfModule> CustomLog /usr/local/apache/domlogs/domain.com-bytes_log "%{%s}t %I .\n%{%s}t %O ." CustomLog /usr/local/apache/domlogs/domain.com combined ScriptAlias /cgi-bin/ /home/user/public_html/cgi-bin/ </VirtualHost> Instead of reading from /home/user/public_html/ apache will read the /var/ww/html/ folder. How to set the apache so that when user access www.domain.com, they will access the files under /home/user/public_html/ ? Please advice. Thanks

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