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• git post-receive hook throws "command not found" error but seems to run properly and no errors when run manually

  - by Ben

  I have a post-receive hook that runs on a central git repository set up with gitolite to trigger a git pull on a staging server. It seems to work properly, but throws a "command not found" error when it is run. I am trying to track down the source of the error, but have not had any luck. Running the same commands manually does not produce an error. The error changes depending on what was done in the commit that is being pushed to the central repository. For instance, if 'git rm ' was committed and pushed to the central repo the error message will be "remote: hooks/post-receive: line 16: Removed: command not found" and if 'git add ' was committed and pushed to the central repo the error message will be "remote: hooks/post-receive: line 16: Merge: command not found". In either case the 'git pull' run on the staging server works correctly despite the error message. Here is the post-receive script: #!/bin/bash # # This script is triggered by a push to the local git repository. It will # ssh into a remote server and perform a git pull. # # The SSH_USER must be able to log into the remote server with a # passphrase-less SSH key *AND* be able to do a git pull without a passphrase. # # The command to actually perform the pull request on the remost server comes # from the ~/.ssh/authorized_keys file on the REMOTE_HOST and is triggered # by the ssh login. SSH_USER="remoteuser" REMOTE_HOST="staging.server.com" `ssh $SSH_USER@$REMOTE_HOST` # This is line 16 echo "Done!" The command that does the git pull on the staging server is in the ssh user's ~/.ssh/authorized_keys file and is: command="cd /var/www/staging_site; git pull",no-port-forwarding,no-X11-forwarding,no-agent-forwarding, ssh-rsa AAAAB3NzaC1yc2EAAAABIwAA... (the rest of the public key) This is the actual output from removing a file from my local repo, committing it locally, and pushing it to the central git repo: ben@tamarack:~/thejibe/testing/web$ git rm ./testing rm 'testing' ben@tamarack:~/thejibe/testing/web$ git commit -a -m "Remove testing file" [master bb96e13] Remove testing file 1 files changed, 0 insertions(+), 5 deletions(-) delete mode 100644 testing ben@tamarack:~/thejibe/testing/web$ git push Counting objects: 3, done. Delta compression using up to 2 threads. Compressing objects: 100% (2/2), done. Writing objects: 100% (2/2), 221 bytes, done. Total 2 (delta 1), reused 0 (delta 0) remote: From [email protected]:testing remote: aa72ad9..bb96e13 master -> origin/master remote: hooks/post-receive: line 16: Removed: command not found # The error msg remote: Done! To [email protected]:testing aa72ad9..bb96e13 master -> master ben@tamarack:~/thejibe/testing/web$ As you can see the post-receive script gets to the echo "Done!" line and when I look on the staging server the git pull has been successfully run, but there's still that nagging error message. Any suggestions on where to look for the source of the error message would be greatly appreciated. I'm tempted to redirect stderr to /dev/null but would prefer to know what the problem is.

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• Unconvert Text File from Binary Format

  - by Hammer Bro.

  I've got a rather large CSV file (~700MB) which I know to consist of lines of 27-character alpha-numeric hashes; no commas or anything fancy. Somehow, during its migration from Windows to Linux (via winSCP and then a few regular SCPs), it has converted into some kind of binary format I am unfamiliar with. If I open the file in vi, everything appears fine, and it says [converted] at the bottom, although I know it's not a line endings issue (and dos2unix doesn't help). If I 'head' the file, it looks proper except for a "ÿþ" at the beginning of the first line. If I open up the file in nano, however, I see the "ÿþ" at the start and then "^@" before every character (even newlines and EoF). If I try to re-save or copy the file (say via: head file.csv short.txt), this special encoding is preserved. I copied the first ten lines out of vi (which displays it properly) into my Windows clipboard via my SSH client, then pasted it into a new text file, test.txt. This file is visually identical when opened in vi (and similar through 'head', minus the "ÿþ"), although it's roughly half of the filesize. Additionally, file test.txt test.txt: ASCII text file short.txt short.txt: I have no idea what format this once-text file got converted to (it's notoriously hard to search the internet for symbols), but surely there must be some way to convert it back. Any ideas?

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• Need an expert advice on *X display manager, window manager and composit manager combination

  - by fakemustache

  Hello! I have fought with myself whether or not i should ask this question but I find myself stuck and I need another expert opinion. I can't seem find the right combination of display and window manager (and composit manager). I have tried so many different combinations but most of them don't work for me. I have been working with Linux for a few years now and currently I'm running Gentoo with GDM, Openbox(stand alone, Gnome aware) and xcompmgr. But I have tried Metacity, Awesome and Fluxbox with and without Compiz, but always with GDM. What I want: A lightweight, HIGHLY configurable environment that doesn't rely on mouse-input too much (except for web browsing and image processing). At 95% I work with multiple consoles and desktops on multiple screens. What makes me ask is that most lightweight environments seem somewhat "unfinished" and show unexpected behavior quite often. And of course I want an environment that's not TOO ugly to look at as I use it at an average of 10 hours a day. :) Any thoughts? What do you use in a similar situation? Thanks for any advice! (Please excuse my english as I'm from Germany, btw greetings from Berlin ;)))

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• zfs setup question

  - by Staale

  Currently I have a linux storage box and server with 4x750gb harddrives in raid-5 with ext3. I have ordered 3x1.5tb disks to upgrade this. Here is my planned upgrade: Backup: Format the 1.5 tb disks Copy all data from the raid-5 disks to the 1.5tb disks Destroy the raid-5 array. New setup: Create a VirtualBox system and install Nexenta (OpenSolaris + ubuntu) on it. Create a zfs pool with zraid1 with the 4 750gb disks. Copy from 1.5tb disks to the virtualbox zfs pool Format the 1.5tb disks. Replace 3 off the 750gb disks with 1.5tb disks. Reuse the 750gb disks elsewhere. The reason I wish to use one 750gb disk is since I can't grow the disk count in a raidz array, and this gives me the option off replacing that disk later for an extra 750gb storage. Would the ZFS performance be good running through virtualbox? Or will the performance overhead be too large? Will I get 1.5tb+1.5tb+750gb storage on the zraid? Or just 750gbx3 until all disks are 1.5tb?

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• How can I make my PCI-E graphics card visible to Ubuntu when the motherboard has integrated graphics

  - by Norman Ramsey

  I have a Gigabyte GA-MA74GM-S2 motherboard with integrated graphics that shows up on lspci as an ATI Radeon 2100. I also bought a PCI-Express Nvidia graphics card so I could use the VDPAU feature on Linux (plays H.264 in hardware). The BIOS has three settings about which display to initialize first: Integrated graphics PCI graphics PCI-Express graphics (PEG) I set the BIOS on PEG, but I cannot get anything, not even a splash screen or POST messages, to emerge from the PCI-Express graphics card. (I'm using a DVI connector; the card also has an HDMI output.) I cannot get the kernel lspci to see the graphics card; the only VGA controller it acknowledges is the integrated one. Running dmidecode acknowledges the existence of an x16 PCI Express slot, and it says Current usage: Unknown There is an additional BIOS setting called "Internal Graphics Mode" which is normally set to "Auto" which means it is supposed to prefer a PCI Express VGA card. I set it to "Disabled" which now means I'm getting no output at all. I will soon be learning how to do a BIOS reset! Other information: The PCI-E card is a MSI N210-MD512H GeForce 210. This is a fanless card. Although there are no fans to see turning, the heat sink on the PCI-E card is definitely getting hot, so the card is getting some sort of power. It gets all its power from the PCI-E slot; there is no external power connector. The BIOS is an AMI Award BIOS. My question: how can I make the PCI Express graphics card visible to Ubuntu?

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• Ingress filtering in Linux traffic control: Redirect traffic to IFB device

  - by Dani Camps

  I have an openwrt router and I want to shape incoming traffic in order to classify all the traffic addressed to a certain IP address in my home network as low priority. For that purpose I want to redirect all traffic incoming to the eth1 interface, the one connected to the DSL modem, to an IFB device where I will do the shaping. These are the details of my system: Linux OpenWrt 2.6.32.27 #7 Fri Jul 15 02:43:34 CEST 2011 mips GNU/Linux Here is the script I am using where the last instruction is failing: # Variable definition ETH=eth1 IFB=ifb1 IP_LP="192.168.1.22/32" DL_RATE="900kbps" HP_RATE="890kbps" LP_RATE="10kbps" TC="tc" # Configuring the ifbX interface insmod ifb insmod sch_htb insmod sch_ingress ifconfig $IFB up # Adding the HTB scheduler to the ingress interface $TC qdisc add dev $IFB root handle 1: htb default 11 # Set the maximum bandwidth that each priority class can get, and the maximum borrowing they can do $TC class add dev $IFB parent 1:1 classid 1:10 htb rate $LP_RATE ceil $DL_RATE $TC class add dev $IFB parent 1:1 classid 1:11 htb rate $HP_RATE ceil $DL_RATE # Redirect all ingress traffic arriving at $ETH to $IFB $TC qdisc del dev $ETH ingress 2>/dev/null $TC qdisc add dev $ETH ingress $TC filter add dev $ETH parent ffff: protocol ip prio 1 u32 \ match u32 0 0 flowid 1:1 \ action mirred egress redirect dev $IFB The last instruction fails with: Action 4 device ifb1 ifindex 9 RTNETLINK answers: No such file or directory We have an error talking to the kernel Does anyone know what am I doing wrong ? Best Regards Daniel

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• mailman web UI on localhost with apache2

  - by Thufir

  I'm interested only in running mailman on localhost and would like access to the web interface, but am getting 404: root@dur:~# root@dur:~# ln -s /etc/mailman/apache.conf /etc/apache2/sites-enabled/mailman -v `/etc/apache2/sites-enabled/mailman' -> `/etc/mailman/apache.conf' root@dur:~# root@dur:~# service apache2 restart * Restarting web server apache2 ... waiting . [ OK ] root@dur:~# root@dur:~# curl http://localhost/mailman/admin/ <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN"> <html><head> <title>404 Not Found</title> </head><body> <h1>Not Found</h1> <p>The requested URL /mailman/admin/ was not found on this server.</p> <hr> <address>Apache/2.2.22 (Ubuntu) Server at localhost Port 80</address> </body></html> root@dur:~# root@dur:~# tail /var/log/apache2/error.log [Mon Aug 27 13:08:02 2012] [error] [client 127.0.0.1] File does not exist: /var/www/mailman [Mon Aug 27 13:10:16 2012] [error] [client 127.0.0.1] File does not exist: /var/www/mailman [Mon Aug 27 13:29:27 2012] [notice] caught SIGTERM, shutting down [Mon Aug 27 13:29:27 2012] [error] python_init: Python version mismatch, expected '2.7.2+', found '2.7.3'. [Mon Aug 27 13:29:27 2012] [error] python_init: Python executable found '/usr/bin/python'. [Mon Aug 27 13:29:27 2012] [error] python_init: Python path being used '/usr/lib/python2.7/:/usr/lib/python2.7/plat-linux2:/usr/lib/python2.7/lib-tk:/usr/lib/python2.7/lib-old:/usr/lib/python2.7/lib-dynload'. [Mon Aug 27 13:29:27 2012] [notice] mod_python: Creating 8 session mutexes based on 6 max processes and 25 max threads. [Mon Aug 27 13:29:27 2012] [notice] mod_python: using mutex_directory /tmp [Mon Aug 27 13:29:28 2012] [notice] Apache/2.2.22 (Ubuntu) mod_python/3.3.1 Python/2.7.3 mod_ruby/1.2.6 Ruby/1.8.7(2011-06-30) configured -- resuming normal operations [Mon Aug 27 13:29:58 2012] [error] [client 127.0.0.1] File does not exist: /var/www/mailman root@dur:~# Although I did have to tinker a bit with mailmain to get that recognized. While I don't need to setup web access using MM list passwords, I would like to setup web admin to add/remove mailing lists. How do I configure apache or mailman so that I can navigate to http://localhost/mailman/admin/? As per installing mailman, I setup aliases as so: root@dur:~# root@dur:~# cat /etc/aliases usenet: root ## mailman mailing list mailman: "|/var/lib/mailman/mail/mailman post mailman" mailman-admin: "|/var/lib/mailman/mail/mailman admin mailman" mailman-bounces: "|/var/lib/mailman/mail/mailman bounces mailman" mailman-confirm: "|/var/lib/mailman/mail/mailman confirm mailman" mailman-join: "|/var/lib/mailman/mail/mailman join mailman" mailman-leave: "|/var/lib/mailman/mail/mailman leave mailman" mailman-owner: "|/var/lib/mailman/mail/mailman owner mailman" mailman-request: "|/var/lib/mailman/mail/mailman request mailman" mailman-subscribe: "|/var/lib/mailman/mail/mailman subscribe mailman" mailman-unsubscribe: "|/var/lib/mailman/mail/mailman unsubscribe mailman" root@dur:~# Perhaps these can be used somehow?

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• Trying to install ffmpeg-php and having installation issues.

  - by dallasclark

  I've installed ffmpeg successfully using the ffmpeginstaller 3 series (http://www.ffmpeginstaller.com/download). ffmpeg is working fine without any known issues with bash. The ffmpeginstaller is meant to install ffmpeg-php but it cannot be found and I receive an error when I execute php -v PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/ffmpeg.so' - /usr/lib64/php/modules/ffmpeg.so: cannot open shared object file: No such file or directory in Unknown on line 0 Looking at the '/usr/lib64/php/modules/' folder, it doesn't contain the ffmpeg.so file. I've tried to install ffmpeg-php manually but I receive the following error checking for ffmpeg headers... configure: error: ffmpeg headers not found. Make sure you've built ffmpeg as shared libs using the --enable-shared option Should I install ffmpeg with series 4 or 5 of ffmpeginstaller or does someone know how to fix this issue? Thanks in advance ! System Specs cat /etc/redhat-release CentOS release 5.5 (Final) cat /proc/version Linux version 2.6.18-028stab068.5 (root@rhel5-64-build) (gcc version 4.1.2 20070626 (Red Hat 4.1.2-14)) #1 php -v PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/ffmpeg.so' - /usr/lib64/php/modules/ffmpeg.so: cannot open shared object file: No such file or directory in Unknown on line 0 PHP 5.2.13 (cli) (built: Mar 2 2010 18:08:48) Copyright (c) 1997-2010 The PHP Group Zend Engine v2.2.0, Copyright (c) 1998-2010 Zend Technologies Any other details you need, just let me know.

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• DNAT to 127.0.0.1 with iptables / Destination access control for transparent SOCKS proxy

  - by cdauth

  I have a server running on my local network that acts as a router for the computers in my network. I want to achieve now that outgoing TCP requests to certain IP addresses are tunnelled through an SSH connection, without giving the people from my network the possibility to use that SSH tunnel to connect to arbitrary hosts. The approach I had in mind until now was to have an instance of redsocks listening on localhost and to redirect all outgoing requests to the IP addresses I want to divert to that redsocks instance. I added the following iptables rule: iptables -t nat -A PREROUTING -p tcp -d 1.2.3.4 -j DNAT --to-destination 127.0.0.1:12345 Apparently, the Linux kernel considers packets coming from a non-127.0.0.0/8 address to an 127.0.0.0/8 address as “Martian packets” and drops them. What worked, though, was to have redsocks listen on eth0 instead of lo and then have iptables DNAT the packets to the eth0 address instead (or using a REDIRECT rule). The problem about this is that then every computer on my network can use the redsocks instance to connect to every host on the internet, but I want to limit its usage to a certain set of IP addresses only. Is there any way to make iptables DNAT packets to 127.0.0.1? Otherwise, does anyone have an idea how I could achieve my goal without opening up the tunnel to everyone? Update: I have also tried to change the source of the packets, without any success: iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 1.2.3.4 -j SNAT --to-source 127.0.0.1 iptables -t nat -A POSTROUTING -p tcp -s 192.168.1.0/24 -d 127.0.0.1 -j SNAT --to-source 127.0.0.1

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• Bad Blocks Exist in Virtual Device PERC H700 Integrated

  - by neoX

  I have a DELL server with PERC H700 Integrated controller. I've made RAID5 with 12 harddrives and the virtual device is in Optimal state, but I receive such errors under linux: sd 0:2:0:0: [sda] Unhandled error code sd 0:2:0:0: [sda] Result: hostbyte=0x07 driverbyte=0x00 sd 0:2:0:0: [sda] CDB: cdb[0]=0x88: 88 00 00 00 00 07 22 50 bd 98 00 00 00 08 00 00 end_request: I/O error, dev sda, sector 30640487832 sd 0:2:0:0: [sda] Unhandled error code sd 0:2:0:0: [sda] Result: hostbyte=0x07 driverbyte=0x00 sd 0:2:0:0: [sda] CDB: cdb[0]=0x88: 88 00 00 00 00 07 22 50 bd 98 00 00 00 08 00 00 end_request: I/O error, dev sda, sector 30640487832 sd 0:2:0:0: [sda] Unhandled error code sd 0:2:0:0: [sda] Result: hostbyte=0x07 driverbyte=0x00 sd 0:2:0:0: [sda] CDB: cdb[0]=0x88: 88 00 00 00 00 07 22 50 bc e0 00 00 01 00 00 00 end_request: I/O error, dev sda, sector 30640487648 But all disk are in Firmware state: Online, Spun Up. Also there is not a single ATA read or write error in any disk in the raid (I check them with smartctl -a -d sat+megaraid,N -H /dev/sda). The only strange thing is in the output in megacli: megacli -LDInfo -L0 -a0 ... Bad Blocks Exist: Yes How could there be bad blocks in a Virtual Drive, which is in optimal state and no disk is broken or even with a single error? I tried "Consistency Check", but it finished successfully and the errors are still in dmesg. Could Someone help me to figure it out what is wrong with my raid?

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• Preventing Windows version of Vim from destroying other file systems permissions

  - by dborba

  I am currently using the windows version of gVim to edit source files on a networked drive mapped to a linux system, as well as local files created in cygwin. The problem is that the windows version of gVim destroys the original file permissions on the respective systems. IE: Files on cygwin are defaulted to 077. When edited by the windows version of vim they are saved as 777.This problem doesn't even occur when using ms-notepad (as well as all other editors I've tried), so I am not quite sure why gVim does it. A possible solution would be to use cygwin's gVim for everything, but that's rather cumbersome as it requires running an x11 environment to support it, and it causes some problems when running some commands from within gVim (or vim for that matter) when working on the networked drive. Any ideas how I might be able to maintain the existing file permissions? Edit: This morning while on a different machine the problem with cygwin did not occur. Cygwin & gVim were the same version, however the other machine is running WinXP while the machine the problem is occurring on runs Win7.

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• likewise-open and samba as pdc

  - by Knight Samar

  Hi, We have successfully implemented a Samba Primary Domain Controller for a hybrid Windows-Linux environment. So now I am setting up dual-boot clients with Windows XP and Ubuntu 9.10. Windows XP can be easily added to the Samba Domain. Everything is manageable. No worries. But when I try using likewise-open 4.1 to add the Ubuntu 9.10 to the samba domain, it cannot locate the domain controller. domainjoin-cli --loglevel verbose join MYDOMAIN root Error: Unable to resolve DC name [code 0x00080026] Resolving 'MYDOMAIN' failed. Check that the domain name is correctly entered. Also check that your DNS server is reachable, and that your system is configured to use DNS in nsswitch. I even tried mydomain.com variations but to no avail. What am I missing ? I read up a document on MSDN wherein it says that the Domain Controller creates some SRV records in the DNS server. I guess, I don't have them on my BIND. Do you think that is the problem ? If yes, can anyone please point out how and what SRV records need to be added. Thanks.

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• How to diagnose frequent segfaults

  - by Andreas Gohr

  My server is logging frequent segmentation faults to /var/log/kern.log in different tools. So far I've seen them in Perl, PHP and rsync. All installed software is up-to-date Debian packages. Here's an exerpt from the log file: Mar 2 01:07:54 gaz kernel: [ 5316.246303] imapsync[4533]: segfault at 8b ip 00007fb448c98fe6 sp 00007ffff571dd68 error 4 in libperl.so.5.10.1[7fb448bd7000+164000] Mar 2 01:17:42 gaz kernel: [ 5904.354307] php5-cgi[4441]: segfault at 2bb3dc8 ip 0000000002bb3dc8 sp 00007fffbeeaae48 error 15 Mar 2 02:54:05 gaz kernel: [11687.922316] php5-cgi[4495]: segfault at 2d7acf9 ip 0000000002d7acf9 sp 00007fff60c6eb18 error 15 Mar 2 10:50:08 gaz kernel: [40250.390322] BUG: unable to handle kernel paging request at 00000000024b03f0 Mar 2 10:50:08 gaz kernel: [40250.390341] IP: [<00000000024b03f0>] 0x24b03f0 Mar 2 10:50:08 gaz kernel: [40250.390353] PGD 208c71067 PUD 21c811067 PMD 209329067 PTE 8000000211c88067 Mar 2 10:50:08 gaz kernel: [40250.390365] Oops: 0011 [#1] SMP Mar 2 10:50:08 gaz kernel: [40250.390373] last sysfs file: /sys/devices/pci0000:00/0000:00:12.0/host4/target4:0:0/4:0:0:0/block/sdb/stat Mar 2 10:50:08 gaz kernel: [40250.390386] CPU 1 Mar 2 10:50:08 gaz kernel: [40250.390392] Modules linked in: cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_conservative xt_recent xt_tcpudp iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ ipv4 ip6table_filter ip6_tables xt_DSCP xt_TCPMSS ipt_LOG ipt_REJECT iptable_mangle iptable_filter xt_multiport xt_state xt_limit xt_conntrack nf_conntrack_ftp nf_conntrack ip_tables x_tables loop snd _hda_codec_atihdmi snd_hda_intel snd_hda_codec snd_hwdep snd_pcm radeon snd_timer ttm snd drm_kms_helper soundcore drm snd_page_alloc i2c_algo_bit shpchp i2c_piix4 edac_core pcspkr k8temp evdev edac_m ce_amd pci_hotplug i2c_core button ext3 jbd mbcache dm_mod powernow_k8 aacraid 3w_9xxx 3w_xxxx raid10 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 raid0 md_mod sata_nv sata_sil sata_via sd_mod crc_t10dif ata_generic ahci pata_atiixp ohci_hcd libata r8169 mii thermal ehci_hcd processor thermal_sys scsi_mod usbcore nls_base [last unloaded: scsi_wait_scan] Mar 2 10:50:08 gaz kernel: [40250.390566] Pid: 11482, comm: munin-limits Not tainted 2.6.32-5-amd64 #1 MS-7368 Mar 2 10:50:08 gaz kernel: [40250.390576] RIP: 0010:[<00000000024b03f0>] [<00000000024b03f0>] 0x24b03f0 Mar 2 10:50:08 gaz kernel: [40250.390586] RSP: 0018:ffff88021cc8dec0 EFLAGS: 00010286 Mar 2 10:50:08 gaz kernel: [40250.390593] RAX: 000000001ddc1000 RBX: 0000000000000010 RCX: ffffffff810f9904 Mar 2 10:50:08 gaz kernel: [40250.390600] RDX: 0000000000000000 RSI: ffffea0007688200 RDI: 0000000000000286 Mar 2 10:50:08 gaz kernel: [40250.390608] RBP: 00000000ffffffea R08: 0000000000000025 R09: 7865542f30312e35 Mar 2 10:50:08 gaz kernel: [40250.390615] R10: 000000d01cc8ddf8 R11: 0000000000000246 R12: ffff88021cc8def8 Mar 2 10:50:08 gaz kernel: [40250.390622] R13: 0000000002295010 R14: 00000000022c9db0 R15: 0000000002488d78 Mar 2 10:50:08 gaz kernel: [40250.390630] FS: 00007f3b3c8b2700(0000) GS:ffff880008d00000(0000) knlGS:0000000000000000 Mar 2 10:50:08 gaz kernel: [40250.390641] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 2 10:50:08 gaz kernel: [40250.390648] CR2: 00000000024b03f0 CR3: 000000021c5d1000 CR4: 00000000000006e0 Mar 2 10:50:08 gaz kernel: [40250.390656] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Mar 2 10:50:08 gaz kernel: [40250.390663] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Mar 2 10:50:08 gaz kernel: [40250.390671] Process munin-limits (pid: 11482, threadinfo ffff88021cc8c000, task ffff88021bf59530) Mar 2 10:50:08 gaz kernel: [40250.390681] Stack: Mar 2 10:50:08 gaz kernel: [40250.390687] ffffffff810f1d4a ffff880208c63228 0000000000000000 00007fffc2dcecc0 Mar 2 10:50:08 gaz kernel: [40250.390697] <0> 00000000024ba2b0 0000000002295010 ffffffff810f1e3d 0000000000000004 Mar 2 10:50:08 gaz kernel: [40250.390712] <0> ffff88021bf59530 ffff88021c4edc00 ffffffff812fe0b6 ffff88021c4edc60 Mar 2 10:50:08 gaz kernel: [40250.390732] Call Trace: Mar 2 10:50:08 gaz kernel: [40250.390742] [<ffffffff810f1d4a>] ? vfs_fstatat+0x2c/0x57 Mar 2 10:50:08 gaz kernel: [40250.390750] [<ffffffff810f1e3d>] ? sys_newstat+0x11/0x30 Mar 2 10:50:08 gaz kernel: [40250.390760] [<ffffffff812fe0b6>] ? do_page_fault+0x2e0/0x2fc Mar 2 10:50:08 gaz kernel: [40250.390768] [<ffffffff812fbf55>] ? page_fault+0x25/0x30 Mar 2 10:50:08 gaz kernel: [40250.390777] [<ffffffff81010b42>] ? system_call_fastpath+0x16/0x1b Mar 2 10:50:08 gaz kernel: [40250.390783] Code: Bad RIP value. Mar 2 10:50:08 gaz kernel: [40250.390791] RIP [<00000000024b03f0>] 0x24b03f0 Mar 2 10:50:08 gaz kernel: [40250.390799] RSP <ffff88021cc8dec0> Mar 2 10:50:08 gaz kernel: [40250.390805] CR2: 00000000024b03f0 Mar 2 10:50:08 gaz kernel: [40250.391051] ---[ end trace 1cc1473b539c7f6e ]--- Mar 2 11:42:20 gaz kernel: [43382.242301] php5-cgi[10963]: segfault at d81160 ip 0000000000d81160 sp 00007fff3adcb058 error 15 Mar 2 21:51:14 gaz kernel: [79916.418302] php5-cgi[20089]: segfault at 1c59dc8 ip 0000000001c59dc8 sp 00007fff9b877fb8 error 15 Mar 3 03:45:01 gaz kernel: [101143.334305] munin-update[22519] general protection ip:7f516dce204c sp:7fff6049a978 error:0 in libperl.so.5.10.1[7f516dc7d000+164000] Mar 3 11:22:37 gaz kernel: [128599.570307] php5-cgi[22888]: segfault at 36485a8 ip 00000000036485a8 sp 00007fff2d56e1c8 error 15 Mar 4 08:32:17 gaz kernel: [204779.842304] php5-cgi[22090]: segfault at 18 ip 0000000000689e5e sp 00007fff677a6a48 error 6 in php5-cgi[400000+6f9000] Mar 4 10:01:02 gaz kernel: [210104.434706] rsync[22236] general protection ip:7f14a07137f9 sp:7fff88f940b8 error:0 in libc-2.11.2.so[7f14a069d000+158000] Mar 4 11:32:22 gaz kernel: [215584.262316] BUG: unable to handle kernel paging request at 00000000ffffff9c Mar 4 11:32:22 gaz kernel: [215584.262331] IP: [<00000000ffffff9c>] 0xffffff9c Mar 4 11:32:22 gaz kernel: [215584.262343] PGD 0 Mar 4 11:32:22 gaz kernel: [215584.262350] Oops: 0010 [#2] SMP Mar 4 11:32:22 gaz kernel: [215584.262359] last sysfs file: /sys/devices/pci0000:00/0000:00:12.0/host4/target4:0:0/4:0:0:0/block/sdb/stat Mar 4 11:32:22 gaz kernel: [215584.262371] CPU 1 Mar 4 11:32:22 gaz kernel: [215584.262378] Modules linked in: cpufreq_userspace cpufreq_stats cpufreq_powersave cpufreq_conservative xt_recent xt_tcpudp iptable_nat nf_nat nf_conntrack_ipv4 nf_defrag_ipv4 ip6table_filter ip6_tables xt_DSCP xt_TCPMSS ipt_LOG ipt_REJECT iptable_mangle iptable_filter xt_multiport xt_state xt_limit xt_conntrack nf_conntrack_ftp nf_conntrack ip_tables x_tables loop snd_hda_codec_atihdmi snd_hda_intel snd_hda_codec snd_hwdep snd_pcm radeon snd_timer ttm snd drm_kms_helper soundcore drm snd_page_alloc i2c_algo_bit shpchp i2c_piix4 edac_core pcspkr k8temp evdev edac_mce_amd pci_hotplug i2c_core button ext3 jbd mbcache dm_mod powernow_k8 aacraid 3w_9xxx 3w_xxxx raid10 raid456 async_raid6_recov async_pq raid6_pq async_xor xor async_memcpy async_tx raid1 raid0 md_mod sata_nv sata_sil sata_via sd_mod crc_t10dif ata_generic ahci pata_atiixp ohci_hcd libata r8169 mii thermal ehci_hcd processor thermal_sys scsi_mod usbcore nls_base [last unloaded: scsi_wait_scan] Mar 4 11:32:22 gaz kernel: [215584.262552] Pid: 1960, comm: proxymap Tainted: G D 2.6.32-5-amd64 #1 MS-7368 Mar 4 11:32:22 gaz kernel: [215584.262563] RIP: 0010:[<00000000ffffff9c>] [<00000000ffffff9c>] 0xffffff9c Mar 4 11:32:22 gaz kernel: [215584.262573] RSP: 0018:ffff880209257e00 EFLAGS: 00010212 Mar 4 11:32:22 gaz kernel: [215584.262580] RAX: ffff8801514eb780 RBX: ffffffff810efb2d RCX: 0000000000000000 Mar 4 11:32:22 gaz kernel: [215584.262590] RDX: 0000000000000020 RSI: 0000000000000001 RDI: ffff8801514eb780 Mar 4 11:32:22 gaz kernel: [215584.262600] RBP: 00000000ffffffe9 R08: 0000000000000000 R09: 0000000000000000 Mar 4 11:32:22 gaz kernel: [215584.262611] R10: ffff880209257e78 R11: ffffffff81152c7c R12: 0000000000000001 Mar 4 11:32:22 gaz kernel: [215584.262622] R13: 0000000000008001 R14: 0000000000000024 R15: 00000000ffffff9c Mar 4 11:32:22 gaz kernel: [215584.262633] FS: 00007fca4de35700(0000) GS:ffff880008d00000(0000) knlGS:0000000000000000 Mar 4 11:32:22 gaz kernel: [215584.262644] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 Mar 4 11:32:22 gaz kernel: [215584.262650] CR2: 00000000ffffff9c CR3: 00000001c9cbb000 CR4: 00000000000006e0 Mar 4 11:32:22 gaz kernel: [215584.262661] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Mar 4 11:32:22 gaz kernel: [215584.262671] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Mar 4 11:32:22 gaz kernel: [215584.262682] Process proxymap (pid: 1960, threadinfo ffff880209256000, task ffff88021c4b1c40) Mar 4 11:32:22 gaz kernel: [215584.262693] Stack: Mar 4 11:32:22 gaz kernel: [215584.262698] ffffffff810f8566 ffff880209257e78 ffff88021c7bf000 ffff88021c7bf0c8 Mar 4 11:32:22 gaz kernel: [215584.262709] <0> 0000800000000000 ffff88021fc0f000 ffff880209257e78 00000000fffffffe Mar 4 11:32:22 gaz kernel: [215584.262724] <0> ffffffff810e5881 ffff880209257f48 0000000000000286 ffff88021fc0f000 Mar 4 11:32:22 gaz kernel: [215584.262743] Call Trace: Mar 4 11:32:22 gaz kernel: [215584.262753] [<ffffffff810f8566>] ? do_filp_open+0xa7/0x94b Mar 4 11:32:22 gaz kernel: [215584.262763] [<ffffffff810e5881>] ? virt_to_head_page+0x9/0x2a Mar 4 11:32:22 gaz kernel: [215584.262771] [<ffffffff810f9904>] ? user_path_at+0x52/0x79 Mar 4 11:32:22 gaz kernel: [215584.262779] [<ffffffff810cfec1>] ? get_unmapped_area+0xd7/0x139 Mar 4 11:32:22 gaz kernel: [215584.262787] [<ffffffff811019d5>] ? alloc_fd+0x67/0x10c Mar 4 11:32:22 gaz kernel: [215584.262795] [<ffffffff810eceaf>] ? do_sys_open+0x55/0xfc Mar 4 11:32:22 gaz kernel: [215584.262804] [<ffffffff81010b42>] ? system_call_fastpath+0x16/0x1b Mar 4 11:32:22 gaz kernel: [215584.262811] Code: Bad RIP value. Mar 4 11:32:22 gaz kernel: [215584.262819] RIP [<00000000ffffff9c>] 0xffffff9c Mar 4 11:32:22 gaz kernel: [215584.262828] RSP <ffff880209257e00> Mar 4 11:32:22 gaz kernel: [215584.262833] CR2: 00000000ffffff9c Mar 4 11:32:22 gaz kernel: [215584.263077] ---[ end trace 1cc1473b539c7f6f ]--- As you can see there are segfaults, a general protection fault and a Kernel Oops. My first guess was that there's a Hardware problem of some sort and I asked my Hoster (it's a rented root server) to do a full hardwarecheck - they did, but couldn't find any problem. I don't know what and how they checked but their support team is usually quite good. I ran memtester and cpuburn myself and couldn't find any error either. Unfortunately I have no reliable way to reproduce these segfaults, they seem to be more or less random. On a hunch I disabled the firewall of the system and ran one of the programs that segfaulted regularily (imapsync) and it seemed to take longer to segfault than before, so the problem might be related to the network stack. Or could just be a random thing. Here are the kernel specs: # uname -a Linux gaz 2.6.32-5-amd64 #1 SMP Wed Jan 12 03:40:32 UTC 2011 x86_64 GNU/Linux # cat /etc/debian_version 6.0 # lsmod Module Size Used by cpufreq_userspace 1992 0 cpufreq_stats 2659 0 cpufreq_powersave 902 0 cpufreq_conservative 5162 0 xt_recent 5977 0 xt_tcpudp 2319 0 iptable_nat 4299 0 nf_nat 13388 1 iptable_nat nf_conntrack_ipv4 9833 3 iptable_nat,nf_nat nf_defrag_ipv4 1139 1 nf_conntrack_ipv4 ip6table_filter 2384 0 ip6_tables 15075 1 ip6table_filter xt_DSCP 1995 0 xt_TCPMSS 2919 0 ipt_LOG 4518 0 ipt_REJECT 1953 0 iptable_mangle 2817 0 iptable_filter 2258 0 xt_multiport 2267 0 xt_state 1303 0 xt_limit 1782 0 xt_conntrack 2407 0 nf_conntrack_ftp 5537 0 nf_conntrack 46535 6 iptable_nat,nf_nat,nf_conntrack_ipv4,xt_state,xt_conntrack,nf_conntrack_ftp ip_tables 13899 3 iptable_nat,iptable_mangle,iptable_filter x_tables 12845 13 xt_recent,xt_tcpudp,iptable_nat,ip6_tables,xt_DSCP,xt_TCPMSS,ipt_LOG,ipt_REJECT,xt_multiport,xt_state,xt_limit,xt_conntrack,ip_tables loop 11799 0 radeon 573996 0 ttm 39986 1 radeon drm_kms_helper 20065 1 radeon snd_hda_codec_atihdmi 2251 1 drm 142359 3 radeon,ttm,drm_kms_helper snd_hda_intel 20019 0 i2c_algo_bit 4225 1 radeon pcspkr 1699 0 i2c_piix4 8328 0 snd_hda_codec 54244 2 snd_hda_codec_atihdmi,snd_hda_intel i2c_core 15712 5 radeon,drm_kms_helper,drm,i2c_algo_bit,i2c_piix4 snd_hwdep 5380 1 snd_hda_codec snd_pcm 60503 2 snd_hda_intel,snd_hda_codec snd_timer 15582 1 snd_pcm snd 46446 5 snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_timer soundcore 4598 1 snd evdev 7352 3 snd_page_alloc 6249 2 snd_hda_intel,snd_pcm k8temp 3283 0 edac_core 29261 0 edac_mce_amd 6433 0 shpchp 26264 0 pci_hotplug 21203 1 shpchp button 4650 0 ext3 106518 2 jbd 37085 1 ext3 mbcache 5050 1 ext3 dm_mod 53754 0 powernow_k8 10978 1 aacraid 59779 0 3w_9xxx 28684 0 3w_xxxx 20569 0 raid10 17809 0 raid456 44500 0 async_raid6_recov 5170 1 raid456 async_pq 3479 2 raid456,async_raid6_recov raid6_pq 77179 2 async_raid6_recov,async_pq async_xor 2478 3 raid456,async_raid6_recov,async_pq xor 4380 1 async_xor async_memcpy 1198 2 raid456,async_raid6_recov async_tx 1734 5 raid456,async_raid6_recov,async_pq,async_xor,async_memcpy raid1 18431 3 raid0 5517 0 md_mod 73824 7 raid10,raid456,raid1,raid0 sata_nv 19166 0 sata_sil 7412 0 sata_via 7928 0 sd_mod 29889 8 crc_t10dif 1276 1 sd_mod ata_generic 3047 0 ahci 32374 6 r8169 29229 0 mii 3210 1 r8169 thermal 11674 0 pata_atiixp 3489 0 libata 133632 6 sata_nv,sata_sil,sata_via,ata_generic,ahci,pata_atiixp ohci_hcd 19212 0 ehci_hcd 31151 0 processor 29935 1 powernow_k8 thermal_sys 11942 2 thermal,processor scsi_mod 122149 5 aacraid,3w_9xxx,3w_xxxx,sd_mod,libata usbcore 122034 3 ohci_hcd,ehci_hcd nls_base 6377 1 usbcore # free total used free shared buffers cached Mem: 8166128 1228036 6938092 0 140412 782060 -/+ buffers/cache: 305564 7860564 Swap: 2102456 0 2102456 So, basically my questions are: How can I diagnose this further? Is there any data in the log above that could help me to isolate the troublemaker? Are there any known problems with the above hardware/software I overlooked when googling for it? Is there a way to prevent the kernel from autoloading modules (I probably don't need all these modules and one of them might be the culprit)

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• Problem setting command-line console resolution. vbeinfo in grub2 does not report all resolutions

  - by Kent

  I have a Asus EEE PC 1005P which I installed a Command-line system on using the Alternate Installer CD of Ubuntu Lucid Lynx. Altough I think this is a general linux and grub2 question. I do not have (or want) the X Window System installed. I want to change my console screen resolution (not inside X) to 1024x600. But it isn't reported when I use vbeinfo inside grub: grub> vbeinfo VBE info: version: 3.0 OEM software rev: 1.0 total memory: 8128 KiB List of compatible video modes: Legend: P=Packed pixel, D=Direct color, mask/pos=R/G/B/reserved 0x112: 640 x 480 x 32 Direct, mask: 8/8/8/8 pos: 16/8/0/24 0x114: 800 x 600 x 16 Direct, mask: 5/6/5/0 pos: 11/5/0/0 0x115: 800 x 600 x 32 Direct, mask: 8/8/8/8 pos: 16/8/0/24 0x101: 640 x 480 x 8 Packed 0x103: 800 x 600 x 8 Packed 0x111: 640 x 480 x 16 Direct, mask: 5/6/5/0 pos: 11/5/0/0 Configured VBE mode (vbe_mode) = ox101 grub> Relevant parts of sudo lspci -v: ... ... 00:02.0 VGA compatible controller: Intel Corporation N10 Family Integrated Graphics Controller Subsystem: ASUSTeK Computer Inc. Device 83ac Flags: bus master, fast devsel, latency 0, IRQ 28 ... Kernel driver in use: i915 Kernel modules: i915 00:02.1 Display controller: Intel Corporation N10 Family Integrated Graphics Controller Subsystem: ASUSTeK Computer Inc. Device 83ac Flags: bus master, fast devsel, latency 0, IRQ 28 ... ... ... Any ideas on how I can set the console resultion like I want it?

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• Recommended setting for using Apache mod_mono with a different user

  - by Korrupzion

  Hello, I'm setting up an ASP.net script in my linux machine using mod_mono. The script spawn procceses of a bin that belongs to another user, but the proccess is spawned by www-data because apache runs with that user, and i need to spawn the proccess with the user that owns the file. I tried setuid bit but it doesn't make any effect. I discovered that if I kill mod-mono-server2.exe and I run it with the user that I need, everything works right, but I want to know the proper way to do this, because after a while apache runs mod-mono-server2.exe as www-data again. Mono-Project webpage says: How can I Run mod-mono-server as a different user? Due to apache's design, there is no straightforward way to start processes from inside of a apache child as a specific user. Apache's SuExec wrapper is targeting CGI and is useless for modules. Mod_mono provides the MonoStartXSP option. You can set it to "False" and start mod-mono-server manually as the specific user. Some tinkering with the Unix socket's permissions might be necessary, unless MonoListenPort is used, which turns on TCP between mod_mono and mod-mono-server. Another (very risky) way: use a setuid 'root' wrapper for the mono executable, inspired by the sources of Apache's SuExec. I want to know how to use the setuid wrapper, because I tried adding the setuid to 'mono' bin and changing the owner to the user that I want, but that made mono crash. Or maybe a way to keep running mono-mod-server2.exe separated from apache without being closed (anyone has a script?) My environment: Debian Lenny 2.6.26-2-amd64 Mono 1.9.1 mod_mono from debian repository Dedicated server (root access and stuff) Using apache vhosts -I use mono for only that script Thanks!

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• PBS batch jobs - the qalter command

  - by Ryan Budney

  I've got a giant computation running on a Scientific Linux cluster. At present I have over 600 jobs parked in the queue, waiting for processor time, while a few are running. I'm trying to use the qalter command on some of the idle but scheduled jobs. I'd like to schedule them for a later time, so that other users can jump part of the queue, sort of as an act of politeness. Is this doable? For example, JOBNAME 292399 is currently idle, scheduled to be run whenever a spot in the queue opens up. But if I run qalter -a 10051000 292398 followed by qrerun 292398 I get qrerun: Request invalid for state of job 292398.euler. From the qalter documentation, I thought 10051000 refers to tomorrow (oct 5th, 10am) but perhaps I'm misunderstanding something? If I'm going about this the wrong way, please let me know. The main thing I'm looking for is a command that's easily scriptable, so that I can modify when my queued tasks get run. qalter seems good for those purposes if I can get it working. I'd rather avoid running qdel and re qsubbing the computations, as there's a bookkeeping issue on which tasks to restart (vs which ones not to). I want to avoid that kind of bookkeeping. From googling around I notice some qalter commands have rather different date formats, but the above appears to be correct, as far as I can tell from the man docs. Any help would be appreciated.

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• Openconnect for Cisco VPN doesn't recognize private key file - asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag

  - by Alexander Skwar

  I'm trying to use my Synology DS212 NAS box also act as VPN gateway to my companies VPN. Sadly, they only use Cisco ASA and to complicate stuff even further, we've got to use personal certificates (which is of course more secure, but more complicate to get going…). So I compiled OpenConnect v4.06 from http://www.infradead.org/openconnect/. As a very basic test, I tried to build a connection by manually invoking openconnect, passing along the key and cert files, like so: /lib/ld-linux.so.3 --library-path /opt/lib \ /opt/openconnect/sbin/openconnect \ --certificate=$VPN_CFG/alexander.crt \ --sslkey=$VPN_CFG/alexander.key \ --cafile=$VPN_CFG/Company_VPN_CA.crt \ --user=alexander --verbose <ip>:443 It fails :( Attempting to connect to <ip>:443 Using certificate file $VPN_CFG/alexander.crt Using client certificate '/[email protected]/OU=Company VPN' 5919:error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag:tasn_dec.c:1315: Loading private key failed (see above errors) Loading certificate failed. Aborting. Failed to open HTTPS connection to <ip> Failed to obtain WebVPN cookie When I run the same command with the same cert/key files on a Ubuntu 12.04 box, it works: openconnect \ --certificate=$VPN_CFG/alexander.crt \ --sslkey=$VPN_CFG/alexander.key \ --cafile=$VPN_CFG/Company_VPN_CA.crt \ --user=alexander --verbose <ip>:443 Attempting to connect to <ip>:443 Using certificate file $VPN_CFG/alexander.crt Extra cert from cafile: '/CN=Company AG VPN CA/O=Company AG/L=Zurich/ST=ZH/C=CH' SSL negotiation with <ip> Server certificate verify failed: self signed certificate Certificate from VPN server "<ip>" failed verification. Reason: self signed certificate Enter 'yes' to accept, 'no' to abort; anything else to view: yes Connected to HTTPS on <ip> GET https://<ip>/ […] Well… The error on the NAS is this: 5919:error:0D0680A8:asn1 encoding routines:ASN1_CHECK_TLEN:wrong tag:tasn_dec.c:1315: Any ideas, what's causing this? On Syno, I use OpenConnect 4.06. On Ubuntu, I just compiled and installed to a custom location OpenConnect 4.06 as well. Thanks, Alexander

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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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• Newbie: get access privilege

  - by Mellon

  I am newbie on Linux Ubuntu machine. I logged in to the Ubuntu with username: student. There are some directories only allowed root user to access, for example /var/lib/mysql ,(I know I can use sudo to access but it is not what I want). If I want to get the access privilege on those directories with student account, is it so that I can run the following command : chown student: PATH_TO_ROOT_USER_PRIVILEGED_DIR and after that, I can access that directory by using my own account ? am I right? If I am right, then will root user lose the access privilege because I changed it to student user? If I am wrong, please tell me the right solution. P.S. please don't concern on what I am going to do on /var/lib/mysql directory, that is only my example, as I mentioned above, I mean generally *for those directories which only have root privilege*, can I use chown to change access privilege and will root user then loose the access because of the change made by chown ? I just wanna know the effect of chown.

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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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• 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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• Kate gives out debug messages on the console from which it is started

  - by Elan

  I am new to Linux. I use Ubuntu 11.04. Whenever I open a file with kate from the commandline, with 'kate &' (or without ampersand), Kate starts out giving messages on the console. It continuously gives them out as I save a file or close one. They look like debug messages to me (sample below). I have used Synaptic package manager to install Kate. Uninstalling and installing the dev version did not make any change. Soon my console becomes cluttered. Is there a way to suppress these messages? There was nothing explicit in Kate settings either. Thank you, The messages look like kate(13412)/kate-filetree KateFileTreeModel::handleInsert: BEGIN! kate(13412)/kate-filetree KateFileTreeModel::handleInsert: creating a new root kate(13412)/kate-filetree ProxyItem::ProxyItem: ProxyItem(0x1796840,0x0,-1,QObject(0x0) .... kate(13435)/kate-filetree KateFileTreeModel::documentActivated: adding viewHistory ProxyItem(0x1eb7cf0,0x1eb6830,0,KateDocument(0x1d93ea0) , "Untitled" ) kate(13435)/kate-filetree KateFileTreeModel::updateBackgrounds: BEGIN! kate(13435)/kate-filetree KateFileTreeModel::updateBackgrounds: END! kate(13435)/kate-filetree KateFileTreeModel::documentActivated: END! kate(13435)/kate-filetree KateFileTreePluginView::viewChanged: END! X Error: BadWindow (invalid Window parameter) 3 Major opcode: 20 (X_GetProperty) Resource id: 0x5601b42 X Error: BadWindow (invalid Window parameter) 3 Major opcode: 20 (X_GetProperty) Resource id: 0x5601b42

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• Can't get Passwordless (SSH provided) SFTP working

  - by Shoaibi

  I have chrooted sftp setup as below. # Package generated configuration file # See the sshd_config(5) manpage for details # What ports, IPs and protocols we listen for Port 22 # Use these options to restrict which interfaces/protocols sshd will bind to #ListenAddress :: #ListenAddress 0.0.0.0 Protocol 2 # HostKeys for protocol version 2 HostKey /etc/ssh/ssh_host_rsa_key HostKey /etc/ssh/ssh_host_dsa_key #Privilege Separation is turned on for security UsePrivilegeSeparation yes # Lifetime and size of ephemeral version 1 server key KeyRegenerationInterval 3600 ServerKeyBits 768 # Logging SyslogFacility AUTH LogLevel INFO # Authentication: LoginGraceTime 120 PermitRootLogin without-password StrictModes yes AllowGroups admins clients RSAAuthentication yes PubkeyAuthentication yes #AuthorizedKeysFile %h/.ssh/authorized_keys # Don't read the user's ~/.rhosts and ~/.shosts files IgnoreRhosts yes # For this to work you will also need host keys in /etc/ssh_known_hosts RhostsRSAAuthentication no # similar for protocol version 2 HostbasedAuthentication no # Uncomment if you don't trust ~/.ssh/known_hosts for RhostsRSAAuthentication #IgnoreUserKnownHosts yes # To enable empty passwords, change to yes (NOT RECOMMENDED) PermitEmptyPasswords no # Change to yes to enable challenge-response passwords (beware issues with # some PAM modules and threads) ChallengeResponseAuthentication no # Change to no to disable tunnelled clear text passwords #PasswordAuthentication yes # Kerberos options #KerberosAuthentication no #KerberosGetAFSToken no #KerberosOrLocalPasswd yes #KerberosTicketCleanup yes # GSSAPI options #GSSAPIAuthentication no #GSSAPICleanupCredentials yes X11Forwarding yes X11DisplayOffset 10 PrintMotd no PrintLastLog yes TCPKeepAlive yes #UseLogin no #MaxStartups 10:30:60 #Banner /etc/issue.net # Allow client to pass locale environment variables AcceptEnv LANG LC_* #Subsystem sftp /usr/lib/openssh/sftp-server # Set this to 'yes' to enable PAM authentication, account processing, # and session processing. If this is enabled, PAM authentication will # be allowed through the ChallengeResponseAuthentication and # PasswordAuthentication. Depending on your PAM configuration, # PAM authentication via ChallengeResponseAuthentication may bypass # the setting of "PermitRootLogin without-password". # If you just want the PAM account and session checks to run without # PAM authentication, then enable this but set PasswordAuthentication # and ChallengeResponseAuthentication to 'no'. UsePAM yes Subsystem sftp internal-sftp Match group clients ChrootDirectory /var/chroot-home X11Forwarding no AllowTcpForwarding no ForceCommand internal-sftp a dummy user root:~# tail -n1 /etc/passwd david:x:1000:1001::/david:/bin/sh Now in this case david can sftp using say filezilla client and he is chrooted to /var/chroot-home/david/. But what if i was to setup a passwordless auth? I have tried pasting his key in /var/chroot-home/david/.ssh/authorized_keys but no use, tried ssh'ing as david to the box and it just stops at "debug1: Sending env LC_CTYPE = C" after i supply it password and there is nothing shown in auth.log, may be because it can't find the homedir. If i do "su - david" as root i see "No directory, logging in with HOME=/" which makes sense. Symlink doesn't help either. I have also tried with: Match group clients ChrootDirectory /var/chroot-home/%u X11Forwarding no AllowTcpForwarding no ForceCommand internal-sftp a dummy user root:~# tail -n1 /etc/passwd david:x:1000:1001::/var/chroot-home/david:/bin/sh This way if i don't change /var/chroot-home/david to root:root sshd complains about bad ownership or permission modes, and if i do, david can no longer upload/delete anything directly in his home while using sftp from filezilla.

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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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