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• How to copy directories using debugfs?

  - by tjbp

  The debugfs manpage gives the impression that the command 'rdump . .' will recursively copy all files found on the specified filesystem from the debugfs cwd to the native filesystem's cwd. Instead I seem to receive a syntax error, and no copy is initiated? These are the commands I run: cd /path/to/transfer/destination debugfs /dev/sda1 -R rdump . . My task is to copy the entire contents of a clean yet unmountable USB storage device to its host machine's HD. The host machine does not support the inode size used by the USB device's filesystem (256) and its software is not upgradeable, so my intention was to use debugfs to transfer the files. If anyone has any other suggestions for this task I'd be grateful.

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• Windows 7 doesn't boot when second hard disk is connected

  - by kenshin9786

  I'm sorry for my bad english on beforehand. I have two hard disks, one SATA and another IDE. I have windows XP and 7 on the SATA one, and Ubuntu on the IDE. Both of them boots and works, bios recognizes them, just works. After I installed Windows 7, and connected the IDE drive, it freezes on "Starting Windows" (the black screen with the Windows logo). I unplug the IDE drive, and it starts normally. Windows XP starts normally on both situations (with or without the IDE one connected), same for Ubuntu (it works with both disks connected or just the IDE where it is). The IDE drive is on good status according to SMART. The IDE is first on boot order. It goes to the Ubuntu's grub first, then by default it goes to the Windows 7 bootloader, and then to XP. I think the problem is not about the bootloader or grub. I just read that it can be solved formatting the "problematic" hard disk because Windows 7 cannot handle so many active partitions or something like that. But that's not an option for me, I don't want to lose my Ubuntu nor have it unbootable. How can I solve this without this consecuences I mentioned? Any help would be appreciated.

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• SORT empties my file?

  - by Jonathan Sampson

  I'm attempting to sort a csv on my machine, but I seem to be erasing the contents each time I use the sort command. I've basically created a copy of my csv lacking the first row: sed '1d' original.csv > newcopy.csv To confirm that my new copy exists lacking the first row I can check with head: head 1 newcopy.csv Sure enough, it finds my file and shows me the original second now (now first row). My csv consists of numerous values seperated by commas: Jonathan Sampson,,,,[email protected],,,GA,United States,, Jane Doe,Mrs,,,[email protected],,,FL,United States,32501, As indicated above, some fields are empty. I want to sort based upon the email address field, which is either 4, or 5 - depending on whether the sort command uses a zero-based index. So I'm trying the following: sort -t, +4 -5 newcopy.csv > newcopy.csv So I'm using -t, to indicate that my fields are terminated by the comma, rather than a space. I'm not sure if +4 -5 actually sorts on the email field or not - I could use some help here. And then newcopy.csv > newcopy.csv to overwrite the original file with new sort results. After I do this, if I try to read in the first line: head 1 newcopy.csv I get the following error: head: cannot open `1' for reading: No such file or directory == newcopy.csv <== Sure enough, if I check my directory the file is now empty, and 0 bytes.

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• Problem switching to a VT from X

  - by Dane Midas

  Hello, I have trouble switching to a VT from X I only have VT 6 defined in inittab, however once in X, ctrl + alt + F6 does not work. I see no errors of any sort, and my keymapping is correct. How would I determine the source of, and solve this problem?

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• Can you have more than one ~/.ssh/config file?

  - by DrewVS

  We have a bastion server that we use to connect to multiple hosts, and our .ssh/config has grown to over a thousand lines (we have hundreds of hosts that we connect to). This is beginning to get a little unwieldy and I'd like to know if there is a way to break the .ssh/config file up into multiple files. Ideally, we'd specify somewhere that other files would be treated as an .ssh/config file, possibly like: ~/.ssh/config ~/.ssh/config_1 ~/.ssh/config_2 ~/.ssh/config_3 ... I have read the documentation on ssh/config, and I don't see that this is possible. But maybe someone else has had a similar issue and has found a solution.

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• How do I force mono sound on Ubuntu 9.10?

  - by Linus Sjögren

  My headphones broke so audio only works on the right speaker. As a temporary fix I want to force all sounds to play in mono in the right speaker. I run Ubuntu 9.10. Is there a way to complete this?

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• Nexus functionality is limited after installation

  - by Dmitriy Sukharev

  I have a CentOS based server with Sonatype Nexus 2.0.4-1 installed. The issue is that there are no standard "Artifact Search", "Advanced Search", "Browse Index", "Refresh Index" Nexus features, as well as Artifact Information tab after selection of any artifact (only Maven Information tab). I tried to Google, but was amazed that there're no information about this issue. Actually it looks like all actions I've done are: wget http://www.sonatype.org/downloads/nexus-2.0.4-1-bundle.tar.gz tar -xvf nexus-2.0.4-1-bundle.tar.gz cp -r nexus-2.0.4-1 sonatype-work /opt/ ln -s /opt/nexus-2.0.4-1/* /opt/nexus ln /opt/nexus/bin/nexus /etc/init.d/ chmod 755 /etc/init.d/nexus vim /etc/init.d/nexus NEXUS_HOME=“/opt/nexus” RUN_AS_USER=“nexus” useradd -s /sbin/nologin -d /var/lib/nexus nexus chown -R nexus /opt/nexus/ chown -R nexus /opt/nexus-2.0.4-1/ sudo -u nexus cp /opt/nexus/conf/examples/proxy-https/jetty.xml /opt/nexus/conf/ To force Nexus be available through HTTPS I went to Administration - Server - Application Server Settings as admin and changed Base URL to https:// external IP/nexus and set Force Base URL to true. Any ideas how to get missed Nexus features?

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• Debian modem problem

  - by Raafat

  I'm a new Debian user, it looks like a very good choice 4 me, every thing is stable, free and easy to use. The problem is, I'm using my modem to establish a dial up connection to the internet (ppp) (a very old stupid way I'm forced to use for now), and using the KPPP application to do that, and nothing is working properly for me. it seems like it didn't recognize my modem or something. I already tried to make a few stuff, and now i know my modem is on /dev/tty0, so i made a link for that on /dev/modem, and query the modem using KPPP and it responded with something like: Ati : Ati0: Ati1: ... ... Ati7: with a textBox to fill up in front of each one of thees Atis, and now, when i press connect on kppp, it says modem ready, and that's it. BTW, my modem is MDC AC'97

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• Backup Xen domU machines while running.

  - by Jonathan Hawkes

  The host machine is running CentOS 5.3 and using LVM to create Logical Volumes (LVs) and to allow live snapshots to be taken of those LVs. My thought was to store all of the image files for the Xen underpriviledged domains (domU) in a single LV and periodically take a snapshot of that LV and copy the disk images out of the snapshot in order to make a live backup of these systems. Is this doable? Is there a better way? Thanks!

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• How to clean up an unprocessed orphan inode list?

  - by bmk

  I tried to mount a formerly readonly mounted filesystem read-writeable: mount -o remount,rw /mountpoint Unfortunately it did not work: mount: /mountpoint not mounted already, or bad option dmesg reports: [2570543.520449] EXT4-fs (dm-0): Couldn't remount RDWR because of unprocessed orphan inode list. Please umount/remount instead A umount does not work, too: umount /mountpoint umount: /mountpoint: device is busy. (In some cases useful info about processes that use the device is found by lsof(8) or fuser(1)) Unfortunately neither lsof of fuser don't show any process accessing something located under the mount point. So - how can I clean up this unprocessed orphan list to be able to mount the filesystem again without rebooting the computer?

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• NFSv3 + ACL: mask is gone on clients

  - by Jorge Suárez de Lis

  I'm sharing a NFS folder among a user group. The default umask on the clients is 0700, and this is a problem because newly created files won't be readable/writable by another users. So, I'm using ACLs to force the umask 0770 on the shared folder, and this works OK on the server, but not on the clients. server # getfacl /export/proyectos getfacl: Eliminando «/» inicial en nombres de ruta absolutos # file: export/proyectos # owner: root # group: root user::rwx group::rwx other::r-x default:user::rwx default:group::rwx default:mask::rwx default:other::r-x server # getfacl /export/proyectos/innovacion getfacl: Eliminando «/» inicial en nombres de ruta absolutos # file: export/proyectos/innovacion # owner: root # group: proyecto-innovacion # flags: ss- user::rwx group::rwx mask::rwx other::--- default:user::rwx default:group::rwx default:mask::rwx default:other::--- As you see, the default (and also a specific on the second directory) mask ACLs are being applied. I mount the whole share on the client: 172.16.54.56:/export/proyectos on /proyectos type nfs (rw,noatime,rsize=131072,wsize=131072,acregmin=10,acl,nfsvers=3,addr=172.16.54.56) But the mask and default:mask ACLs are gone. client $ getfacl /proyectos/ getfacl: Eliminando «/» inicial en nombres de ruta absolutos # file: proyectos/ # owner: root # group: root user::rwx group::rwx other::r-x default:user::rwx default:group::rwx default:other::r-x client $ getfacl /proyectos/innovacion getfacl: Eliminando «/» inicial en nombres de ruta absolutos # file: proyectos/innovacion # owner: root # group: proyecto-innovacion # flags: ss- user::rwx group::rwx other::--- default:user::rwx default:group::rwx default:other::--- It lacks the default:mask and mask ACLs, the only ones that I've setted. So the proposed solution to enforce umask won't work for me. Why is happening this?

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• Why a SIGHUP signal to httpd kills the tomcat process?

  - by Geo

  I have a server with a tomcat process binding to port 80 and a httpd processes binding to port 5000. For some reason every time any process send a SIGHUP signal to httpd process my tomcat process disappears without error or anything. I fixed the issue on the server the following way, added an explicit ServerName directive in the httpd.conf and that fixed the issue. I still don't understand why the SIGHUP to httpd killed the tomcat process. NOTE 1: I replicated the kill signal with the following command: find out what the httpd pid is. cat /etc/httpd/run/httpd.pid 4056 then kill with a sighup signal kill -s SIGHUP 4056 NOTE 2: We troubleshoot the issue and find that logrotate running every morning at 4am was sending a SIGHUP signal to realease the logs to be able to rotate them, thus killing tomcat as well.

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• USB key to pass password in Centos 6

  - by Andrew

  I had a room mate that put a livecd in my desktop and looked around on my machine. I caught him in the act and threw him out. I haven't had a room mate for a while now and so as to avoid the livecd issue again I encrypted the hard drive, the machine is running centos 6.3. Is there anyway that I can avoid typing the password in each time if I have usb key in the machine to feed the password to the system? Additional question. Is there anything you can suggest to solve the problem I have ? Thanks

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• Backtrack 4 internet problem/vmware tools

  - by Meiko

  Hi i recently installed "Backtrack 4" on my vmware workstation 6.5 and it wont install the vmware tools, and will neither let me drag and drop files into backtrack 4. My network connection says that dhcp is not enabled, but i went over to my reuter and checked and the dhcp was online (using Dir-300 from D-Link)

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• Removing default mysql on Slackware 13

  - by bullettime

  I was playing around the default mysql that comes with Slackware 13, and I think I broke it somehow. I don't want to fix it, I'd like to start from scratch, building from source and everything, but first I have to remove this broken installation. How can I do this?

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• What is consuming memory?

  - by Milan Babuškov

  Feel free to change the question title. I have a VPS with standard LAMP stack and a busy website. Operating system is CentOS 5.5. Virtualization is done with VMWare. My server gets real slow about every 6 hours. Logging into it I see that 1.6GB of RAM is consumed. However, listing the active processes does not explain the problem. Can anyone make any sense of this? "free" shows this: total used free shared buffers cached Mem: 2059456 2049280 10176 0 14780 380968 -/+ buffers/cache: 1653532 405924 Swap: 2096472 96 2096376 While this is output of "ps": [root@vmi29 /]# ps aux USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.0 10348 688 ? Rs Jun05 0:01 init [3] root 2 0.0 0.0 0 0 ? S< Jun05 0:00 [migration/0] root 3 0.0 0.0 0 0 ? SN Jun05 0:00 [ksoftirqd/0] root 4 0.0 0.0 0 0 ? S< Jun05 0:00 [migration/1] root 5 0.0 0.0 0 0 ? SN Jun05 0:00 [ksoftirqd/1] root 6 0.0 0.0 0 0 ? S< Jun05 0:00 [migration/2] root 7 0.0 0.0 0 0 ? SN Jun05 0:00 [ksoftirqd/2] root 8 0.0 0.0 0 0 ? S< Jun05 0:00 [migration/3] root 9 0.0 0.0 0 0 ? SN Jun05 0:00 [ksoftirqd/3] root 10 0.0 0.0 0 0 ? S< Jun05 0:06 [events/0] root 11 0.0 0.0 0 0 ? S< Jun05 0:00 [events/1] root 12 0.0 0.0 0 0 ? S< Jun05 0:00 [events/2] root 13 0.0 0.0 0 0 ? S< Jun05 0:00 [events/3] root 14 0.0 0.0 0 0 ? S< Jun05 0:00 [khelper] root 31 0.0 0.0 0 0 ? S< Jun05 0:00 [kthread] root 38 0.0 0.0 0 0 ? S< Jun05 0:00 [kblockd/0] root 39 0.0 0.0 0 0 ? S< Jun05 0:00 [kblockd/1] root 40 0.0 0.0 0 0 ? S< Jun05 0:00 [kblockd/2] root 41 0.0 0.0 0 0 ? S< Jun05 0:00 [kblockd/3] root 42 0.0 0.0 0 0 ? S< Jun05 0:00 [kacpid] root 204 0.0 0.0 0 0 ? S< Jun05 0:00 [cqueue/0] root 205 0.0 0.0 0 0 ? S< Jun05 0:00 [cqueue/1] root 206 0.0 0.0 0 0 ? S< Jun05 0:00 [cqueue/2] root 207 0.0 0.0 0 0 ? S< Jun05 0:00 [cqueue/3] root 210 0.0 0.0 0 0 ? S< Jun05 0:00 [khubd] root 212 0.0 0.0 0 0 ? S< Jun05 0:00 [kseriod] root 302 0.0 0.0 0 0 ? S Jun05 0:00 [khungtaskd] root 303 0.0 0.0 0 0 ? S Jun05 0:00 [pdflush] root 304 0.0 0.0 0 0 ? S Jun05 0:01 [pdflush] root 305 0.0 0.0 0 0 ? S< Jun05 0:05 [kswapd0] root 306 0.0 0.0 0 0 ? S< Jun05 0:00 [aio/0] root 307 0.0 0.0 0 0 ? S< Jun05 0:00 [aio/1] root 308 0.0 0.0 0 0 ? S< Jun05 0:00 [aio/2] root 309 0.0 0.0 0 0 ? S< Jun05 0:00 [aio/3] root 515 0.0 0.0 0 0 ? S< Jun05 0:00 [kpsmoused] root 582 0.0 0.0 0 0 ? S< Jun05 0:00 [mpt_poll_0] root 583 0.0 0.0 0 0 ? S< Jun05 0:00 [mpt/0] root 584 0.0 0.0 0 0 ? S< Jun05 0:00 [scsi_eh_0] root 590 0.0 0.0 0 0 ? S< Jun05 0:00 [ata/0] root 591 0.0 0.0 0 0 ? S< Jun05 0:00 [ata/1] root 592 0.0 0.0 0 0 ? S< Jun05 0:00 [ata/2] root 593 0.0 0.0 0 0 ? S< Jun05 0:00 [ata/3] root 594 0.0 0.0 0 0 ? S< Jun05 0:00 [ata_aux] root 610 0.0 0.0 0 0 ? S< Jun05 0:00 [kstriped] root 631 0.0 0.0 0 0 ? S< Jun05 0:05 [kjournald] root 656 0.0 0.0 0 0 ? S< Jun05 0:00 [kauditd] root 689 0.0 0.0 13364 928 ? S<s Jun05 0:00 /sbin/udevd -d root 2123 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpathd/0] root 2124 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpathd/1] root 2126 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpathd/2] root 2127 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpathd/3] root 2128 0.0 0.0 0 0 ? S< Jun05 0:00 [kmpath_handlerd] root 2203 0.0 0.0 0 0 ? S< Jun05 0:00 [kjournald] root 2613 0.0 0.0 5908 648 ? Ss Jun05 0:00 syslogd -m 0 root 2617 0.0 0.0 3804 424 ? Ss Jun05 0:00 klogd -x root 2707 0.0 0.0 10760 372 ? Ss Jun05 0:02 irqbalance apache 2910 0.5 0.6 213964 12912 ? S 00:22 0:07 /usr/sbin/httpd dbus 3011 0.0 0.0 21256 904 ? Ss Jun05 0:00 dbus-daemon --system root 3025 0.0 0.0 3800 576 ? Ss Jun05 0:00 /usr/sbin/acpid 68 3038 0.0 0.2 31152 4336 ? Ss Jun05 0:01 hald root 3039 0.0 0.0 21692 1176 ? S Jun05 0:00 hald-runner 68 3046 0.0 0.0 12324 856 ? S Jun05 0:00 hald-addon-acpi: listening on acpid socket /var/run/acpid.s 68 3052 0.0 0.0 12324 856 ? S Jun05 0:00 hald-addon-keyboard: listening on /dev/input/event0 root 3105 0.0 0.0 62624 1212 ? Ss Jun05 0:00 /usr/sbin/sshd root 3264 0.0 0.0 74820 1156 ? Ss Jun05 0:00 crond root 3292 0.0 0.0 18416 472 ? S Jun05 0:00 /usr/sbin/smartd -q never root 3300 0.0 0.0 3792 480 tty2 Ss+ Jun05 0:00 /sbin/mingetty tty2 root 3301 0.0 0.0 3792 480 tty3 Ss+ Jun05 0:00 /sbin/mingetty tty3 root 3302 0.0 0.0 3792 484 tty4 Ss+ Jun05 0:00 /sbin/mingetty tty4 root 3304 0.0 0.0 3792 480 tty5 Ss+ Jun05 0:00 /sbin/mingetty tty5 root 3306 0.0 0.0 3792 480 tty6 Ss+ Jun05 0:00 /sbin/mingetty tty6 apache 5158 0.4 0.5 211896 11848 ? S 00:28 0:04 /usr/sbin/httpd apache 5519 0.4 0.5 211896 11992 ? S 00:29 0:03 /usr/sbin/httpd root 5649 0.0 0.0 63848 1184 pts/0 S Jun05 0:00 /bin/sh /usr/bin/mysqld_safe --datadir=/var/lib/mysql --soc mysql 5696 2.1 1.9 411060 40392 pts/0 Rl Jun05 2:01 /usr/libexec/mysqld --basedir=/usr --datadir=/var/lib/mysql apache 5943 0.4 0.5 211896 12000 ? S 00:30 0:03 /usr/sbin/httpd apache 5976 0.6 0.5 211896 11792 ? S 00:30 0:04 /usr/sbin/httpd apache 6073 0.4 0.5 211896 11208 ? S 00:31 0:03 /usr/sbin/httpd apache 6122 0.4 0.5 211896 11848 ? S 00:31 0:03 /usr/sbin/httpd apache 6128 0.3 0.5 211896 11940 ? S 00:31 0:02 /usr/sbin/httpd apache 6159 0.5 0.5 211896 11872 ? S 00:31 0:04 /usr/sbin/httpd apache 6636 0.4 0.6 213960 13444 ? S 00:32 0:02 /usr/sbin/httpd apache 6787 0.3 0.5 211884 11308 ? S 00:33 0:02 /usr/sbin/httpd apache 6796 0.4 0.5 211884 12024 ? S 00:33 0:02 /usr/sbin/httpd apache 6801 0.3 0.5 211896 11920 ? S 00:33 0:01 /usr/sbin/httpd apache 6804 0.4 0.5 211884 11848 ? S 00:33 0:02 /usr/sbin/httpd apache 6825 0.4 0.5 211896 11972 ? S 00:33 0:02 /usr/sbin/httpd apache 6866 0.3 0.5 210860 11044 ? S 00:33 0:01 /usr/sbin/httpd apache 6870 0.2 0.5 211896 11108 ? S 00:33 0:01 /usr/sbin/httpd apache 6872 0.3 0.5 211896 11900 ? S 00:33 0:01 /usr/sbin/httpd apache 6993 0.3 0.5 211896 11836 ? S 00:33 0:02 /usr/sbin/httpd apache 6994 0.3 0.5 211896 11792 ? S 00:33 0:01 /usr/sbin/httpd apache 7136 0.2 0.5 211896 11432 ? S 00:34 0:01 /usr/sbin/httpd apache 7143 0.2 0.5 210860 11052 ? S 00:34 0:01 /usr/sbin/httpd apache 7145 0.2 0.5 211896 11136 ? S 00:34 0:01 /usr/sbin/httpd apache 7266 0.2 0.6 213952 12748 ? S 00:34 0:01 /usr/sbin/httpd apache 7299 0.2 0.5 211884 11276 ? S 00:34 0:01 /usr/sbin/httpd apache 7311 0.2 0.5 211884 11300 ? S 00:34 0:01 /usr/sbin/httpd apache 7313 0.3 0.5 211884 11876 ? S 00:34 0:01 /usr/sbin/httpd apache 7345 0.2 0.5 210872 11100 ? S 00:34 0:01 /usr/sbin/httpd apache 7349 0.2 0.5 210860 11008 ? S 00:34 0:01 /usr/sbin/httpd apache 7350 0.2 0.5 211896 11832 ? S 00:34 0:01 /usr/sbin/httpd apache 7351 0.1 0.5 211884 11072 ? S 00:34 0:00 /usr/sbin/httpd apache 7352 0.2 0.5 210872 11096 ? S 00:34 0:01 /usr/sbin/httpd apache 7449 0.1 0.5 210860 11020 ? S 00:35 0:00 /usr/sbin/httpd root 7490 0.3 0.0 0 0 ? S Jun05 3:11 [vmmemctl] root 7597 0.0 0.0 72656 1260 ? Ss Jun05 0:06 /usr/lib/vmware-tools/sbin64/vmware-guestd --background /va apache 7720 0.1 0.5 210860 10748 ? S 00:36 0:00 /usr/sbin/httpd apache 7726 0.1 0.4 209836 9304 ? R 00:36 0:00 /usr/sbin/httpd apache 7727 0.1 0.5 210860 10916 ? S 00:36 0:00 /usr/sbin/httpd apache 7731 0.1 0.5 210860 10780 ? S 00:36 0:00 /usr/sbin/httpd apache 7732 0.3 0.5 210860 10916 ? S 00:36 0:01 /usr/sbin/httpd apache 7733 0.1 0.5 210872 11000 ? S 00:36 0:00 /usr/sbin/httpd apache 7735 0.1 0.5 211884 11048 ? S 00:36 0:00 /usr/sbin/httpd apache 7761 0.1 0.5 210860 10552 ? S 00:36 0:00 /usr/sbin/httpd apache 7776 0.1 0.4 209836 8648 ? R 00:37 0:00 /usr/sbin/httpd apache 7790 0.2 0.3 208812 7724 ? R 00:40 0:00 /usr/sbin/httpd apache 7800 0.2 0.3 208812 8088 ? R 00:40 0:00 /usr/sbin/httpd root 7801 0.0 0.0 3792 484 tty1 Ss+ 00:41 0:00 /sbin/mingetty tty1 apache 7820 0.2 0.3 208812 7552 ? R 00:41 0:00 /usr/sbin/httpd apache 7834 0.2 0.3 207788 6756 ? R 00:42 0:00 /usr/sbin/httpd apache 7864 0.2 0.2 207788 6148 ? R 00:42 0:00 /usr/sbin/httpd apache 7872 0.3 0.2 207788 5856 ? R 00:43 0:00 /usr/sbin/httpd apache 7874 2.5 0.3 207788 6336 ? R 00:43 0:00 /usr/sbin/httpd root 7875 0.3 0.0 63844 1056 ? S 00:43 0:00 sh -c lsb_release -sd 2>/dev/null root 7879 1.6 0.0 65604 964 pts/0 R+ 00:43 0:00 ps aux root 16316 0.0 0.1 90128 3272 ? Ss Jun05 0:00 sshd: milanb [priv] milanb 16358 0.0 0.0 90128 1752 ? S Jun05 0:00 sshd: milanb@pts/0 milanb 16360 0.0 0.0 66076 1480 pts/0 Ss Jun05 0:00 -bash root 16875 0.0 0.0 101068 1324 pts/0 S Jun05 0:00 su - root 16877 0.0 0.0 66184 1692 pts/0 S Jun05 0:00 -bash root 24373 0.0 0.3 206764 7348 ? Rs Jun05 0:01 /usr/sbin/httpd

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• Problems with LDAP auth in Apache, works only for one group

  - by tore-

  Hi, I'm currently publishing some subversions repos within Apache: <Location /dev/> DAV svn SVNPath /opt/svn/repos/dev/ AuthType Basic AuthName "Subversion repo authentication" AuthBasicProvider ldap AuthzLDAPAuthoritative On AuthLDAPBindDN "CN=readonlyaccount,OU=Objects,DC=invalid,DC=now" AuthLDAPBindPassword readonlyaccountspassword AuthLDAPURL "ldap://invalid.domain:389/OU=Objects,DC=invalid,DC=domain?sAMAccountName?sub?(objectClass=*)" Require ldap-group cn=dev,ou=SVN,DC=invalid,DC=domain </Location> This setup works great, but now we want to give an LDAP group read only access to our repo, then my apache config looks like this: <Location /dev/> DAV svn SVNPath /opt/svn/repos/dev/ AuthType Basic AuthName "Subversion repo authentication" AuthBasicProvider ldap AuthzLDAPAuthoritative On AuthLDAPBindDN "CN=readonlyaccount,OU=Objects,DC=invalid,DC=now" AuthLDAPBindPassword readonlyaccountspassword AuthLDAPURL "ldap://invalid.domain:389/OU=Objects,DC=invalid,DC=domain?sAMAccountName?sub?(objectClass=*)" <Limit OPTIONS PROPFIND GET REPORT> Require ldap-group cn=dev-ro,ou=SVN,dc=invalid,dc=domain </Limit> <LimitExcept OPTIONS PROPFIND GET REPORT> Require ldap-group cn=dev-rw,ou=SVN,dc=invalid,dc=domain </LimitExcept> </Location> All of my user accounts is under: OU=Objects,DC=invalid,DC=domain All groups related to subversion is under: ou=SVN,dc=invalid,dc=domain The problem after modification, only users in the dev-ro LDAP group is able to authenticate. I know that authentication with LDAP works, since my apache logs show my usernames: 10.1.1.126 - tore [...] "GET /dev/ HTTP/1.1" 200 339 "-" "Mozilla/5.0 (...)" 10.1.1.126 - - [...] "GET /dev/ HTTP/1.1" 401 501 "-" "Mozilla/4.0 (...)" 10.1.1.126 - readonly [...] "GET /dev/ HTTP/1.1" 401 501 "-" "Mozilla/4.0 (...) line = user in group dev-rw, 2. line is unauthenticated user, 3. line is unauthenticated user, authenticated as a user in group dev-ro So I think I've messed up my apache config. Advise?

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• Find out which task is generating a lot of context switches on linux

  - by Gaks

  According to vmstat, my Linux server (2xCore2 Duo 2.5 GHz) is constantly doing around 20k context switches per second. # vmstat 3 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 2 0 7292 249472 82340 2291972 0 0 0 0 0 0 7 13 79 0 0 0 7292 251808 82344 2291968 0 0 0 184 24 20090 1 1 99 0 0 0 7292 251876 82344 2291968 0 0 0 83 17 20157 1 0 99 0 0 0 7292 251876 82344 2291968 0 0 0 73 12 20116 1 0 99 0 ... but uptime shows small load: load average: 0.01, 0.02, 0.01 and top doesn't show any process with high %CPU usage. How do I find out what exactly is generating those context switches? Which process/thread? I tried to analyze pidstat output: # pidstat -w 10 1 12:39:13 PID cswch/s nvcswch/s Command 12:39:23 1 0.20 0.00 init 12:39:23 4 0.20 0.00 ksoftirqd/0 12:39:23 7 1.60 0.00 events/0 12:39:23 8 1.50 0.00 events/1 12:39:23 89 0.50 0.00 kblockd/0 12:39:23 90 0.30 0.00 kblockd/1 12:39:23 995 0.40 0.00 kirqd 12:39:23 997 0.60 0.00 kjournald 12:39:23 1146 0.20 0.00 svscan 12:39:23 2162 5.00 0.00 kjournald 12:39:23 2526 0.20 2.00 postgres 12:39:23 2530 1.00 0.30 postgres 12:39:23 2534 5.00 3.20 postgres 12:39:23 2536 1.40 1.70 postgres 12:39:23 12061 10.59 0.90 postgres 12:39:23 14442 1.50 2.20 postgres 12:39:23 15416 0.20 0.00 monitor 12:39:23 17289 0.10 0.00 syslogd 12:39:23 21776 0.40 0.30 postgres 12:39:23 23638 0.10 0.00 screen 12:39:23 25153 1.00 0.00 sshd 12:39:23 25185 86.61 0.00 daemon1 12:39:23 25190 12.19 35.86 postgres 12:39:23 25295 2.00 0.00 screen 12:39:23 25743 9.99 0.00 daemon2 12:39:23 25747 1.10 3.00 postgres 12:39:23 26968 5.09 0.80 postgres 12:39:23 26969 5.00 0.00 postgres 12:39:23 26970 1.10 0.20 postgres 12:39:23 26971 17.98 1.80 postgres 12:39:23 27607 0.90 0.40 postgres 12:39:23 29338 4.30 0.00 screen 12:39:23 31247 4.10 23.58 postgres 12:39:23 31249 82.92 34.77 postgres 12:39:23 31484 0.20 0.00 pdflush 12:39:23 32097 0.10 0.00 pidstat Looks like some postgresql tasks are doing 10 context swiches per second, but it doesn't all sum up to 20k anyway. Any idea how to dig a little deeper for an answer?

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• samba4 not building in archlinux.

  - by kmplsv

  cp bin/tdbtool bin/tdbdump bin/tdbbackup /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/bin cp ./include/tdb.h /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/include cp tdb.pc /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/pkgconfig cp libtdb.a libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib rm -f /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so ln -s libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so rm -f /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so.1 ln -s libtdb.so.1.2.4 /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/lib/libtdb.so.1 mkdir -p /tmp/yaourt-tmp-root/aur-samba4/pkg/`/tmp/yaourt-tmp-root/aur-samba4/src/bin/python -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(1, prefix='/opt/samba4/samba')"` cp tdb.so /tmp/yaourt-tmp-root/aur-samba4/pkg/`/tmp/yaourt-tmp-root/aur-samba4/src/bin/python -c "import distutils.sysconfig; print distutils.sysconfig.get_python_lib(1, prefix='/opt/samba4/samba')"` /bin/install -c -d /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/share/man/man8 for I in manpages/*.8; do \ /bin/install -c -m 644 $I /tmp/yaourt-tmp-root/aur-samba4/pkg//opt/samba4/samba/share/man/man8; \ done /bin/install: cannot stat `manpages/*.8': No such file or directory make: *** [installdocs] Error 1 Aborting... ==> ERROR: Makepkg was unable to build samba4. ==> Restart building samba4 ? [y/N] ==> ------------------------------- ==>c any ideas as what is causing my build to fail? i'm assuming it's an issue with manpages but i can't figure out exactly what package it is looking for that i don't have.

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• using sed to replace 1 line with a multi-line variable in ksh

  - by Manda

  I have the following text in a file: XXXX NNNN YYYY NNNN ZZZZ NNNN I want to replace the NNNN to make it look like this: XXXX NNNN DUTY FORECASTER: YYYY NNNN DUTY FORECASTER: ZZZZ NNNN DUTY FORECASTER: How do I use sed to replace a variable with more than one line? Is there a better way of doing this without using sed? I have tried the following to no avail: sed 's/NNNN/"$value1"/g' testfile sed 's/NNNN/'"$value1"'/g' testfile sed 's/NNNN/${value1}/g' testfile sed 's/NNNN/'"${value1}"'/g' testfile I have also tried all of the above using double quotes. Any help is greatly appreciated. Thanks so much!

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• OpenVZ vs Xen, how much difference in performance?

  - by Aleksandr Levchuk

  There is a Xen vs. KVM in performance question on ServerFault. What will be the performance difference if the choice is between Xen and OpenVZ? How is it best to measure? Some may say "you're comparing apples and oranges" but I have to choose one of the two and it needs to be wise choice. Performance is most important to us. We may switching to Xen from OpenVZ because Xen is more ubiquitous but only if performance difference is not significant. In January 2011 I'm thinking of doing a head to head performance comparison - here is my project proposal to our Bioinformatics facility director.

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• cPanel web server redundancy advice?

  - by crgnz

  At present I operate a (reasonably low volume) web-hosting service with a Centos 5.3 server running cPanel/WHM. I would like to implement a level of redundancy such that in the event of server failure, I can restore service with a minimum of effort in less than 60 minutes. I also want to setup a secondary DNS that cPanel will replicate with. My current idea is to kill two birds with one stone by: My current server is called "www1" Purchase an identical server (HP DL360 G4) with mirrored disks. Call this server "www2" Install Centos 5.4 (or perhaps I should install 5.3 to be identical with www1) Install cPanel/WHM on this server and fully license it Setup www1 and www2 cPanel to replicate DNS with each other Setup a nightly replication script that does the following: a) rsync's the /home directory from www1 to www2 b) dumps all MySQL databases on www1 and copies them to a temp folder (with root access only) on www2 c) triggers a script to run on www2 that restores the MySQL dumps Thus each night a fully working copy of all the websites and MySQL databases is copied to www2. I do not have enough knowledge of MySQL replication to understand if it works safely and transparently with cPanel. Thus I propose the mysql dump/copy/restore due to not knowing any better! In the event that www1 dies a horrible death, I envisage that I could login to www2, change the IP addresses to those that www1 had, and presto, the websites are available again. The advantage of this idea is that it is fairly simple and "low tech" and thus does not require an expert sysadmin to setup and monitor (I am NOT an expert sysadmin) The disadvantage of this idea is that up to a full days worth of data changes would be lost. I think this would be acceptable to the sorts of customers I host at the moment. The other disadvantage would be having to pay for a full cPanel license, but I am comfortable with that cost, so for now all I want to discuss are technical considerations. Is this a sound scheme?

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• Syntax Error when setting up Domain Alias

  - by Poundtrader

  I'm attempting to set up a domain alias via Pre VirtualHost Include and I'm recieving the following error: Error: An error occurred while running: /usr/local/apache/bin/httpd -DSSL -t -f /usr/local/apache/conf/httpd.conf Exit signal was: 0 Exit value was: 1 Output was: --- Syntax error on line 15 of /usr/local/apache/conf/includes/pre_virtualhost_global.conf: CustomLog takes two or three arguments, a file name, a custom log format string or format name, and an optional "env=" clause (see docs) --- Basically I have two domains, the main domain has an opencart installation within a directory (/buy) and I'm attempting to use the multi-store function which allows you to administer multiple stores on multiple domains via the one opencart dashboard. My issue is that I have the opencart installations within the /buy directory so I have been given the following code which should allow me to use this functionality over the multiple cPanel accounts within the same VPS. <VirtualHost 87.117.239.29:80> ServerName newdomain.co.uk ServerAlias www.newdomain.co.uk Alias /buy /home/originaldomain/public_html/buy/ DocumentRoot /home/newdom/public_html ServerAdmin [email protected] ## User newdom # Needed for Cpanel::ApacheConf <IfModule mod_suphp.c> suPHP_UserGroup newdom newdom </IfModule> <IfModule mod_ruid2.c> RUidGid newdom newdom </IfModule> CustomLog /usr/local/apache/domlogs/newdomain.co.uk-bytes_log “%{%s}t %I .\n%{%s}t %O .” CustomLog /usr/local/apache/domlogs/newdomain.co.uk combined ScriptAlias /cgi-bin/ /home/newdom/public_html/cgi-bin/ </VirtualHost> Does anyone know how to get this code to work? Thanks,

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• How to migrate a running KVM (with full disk copy) to another node?

  - by klipz

  I'm doing tests on KVM, and I'd like to see if I can make a hot migration, I mean the virtual machine won't stop running during the migration (but a few seconds of freeze is ok). I use a small cluster for my test : kvm1, kvm2, and kvmnfs. kvm1 and kvm2 runs the virtual machines kvmnfs is a NFS server, and it's mounted on /KVM on both kvm1 and kvm2 To migrate a VM (only RAM in fact) from kvm1 to kvm2, I run the same kvm command on kvm2 (with -incoming tcp:0:4444) that on kvm1, then I use "migrate -d tcp:kvm2:4444" : It works great, since the VM file is common to both machines. Now, I wan't to make a full migration (RAM + disk) of a local VM file (no more NFS) of kvm1 to kvm2. I tried to create an empty file, with touch, on kvm2 and use the same kvm command line + the "-incoming ..."). Then on kvm1 I use "migrate -d tcp:kvm2:4444" : It copies everything, then... the VM fails (any I/O disk gives an I/O error) ! And my VM file on kvm2, the one I created with touch, as still a size of 0 bytes. What am I doing wrong ? What is the exact command to use on kvm2 ? And what is the command to launch, in the monitoring mode, on kvm1 ?

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• Load balancing with rsync

  - by David

  i have 2 server with public ip: SERVER A - 10.10.10.11 SERVER B - 10.10.10.12 both of them are centos 6 in OS, installed nginx with php-fpm, 2 exact same website stored at: /var/www/html. Domain with: myxdomain.com and dns hosted with cloudflare ( since cloudflare do support round robin ) to point the domain to A record of 10.10.10.11 and 10.10.10.12. I know that round robin dns does not cover the failover or fallover, but it does not matter, what i need is: How do i sync the both content of /var/www/html server A and server B to be exactly same? Lets say: 1) user uploaded their file to server A, the file content will be sync to server B as well. 2) user uploaded their file to server B, the file content will be sync to server A as well. rsync will be good choice here? Any example of command line and cronjob time that suitable? thanks

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