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  • Resizing mysterious partition written by DDing an ISO file

    - by Jon
    I downloaded clonezilla and then wrote it to a USB flash drive with this: dd if=clonezilla.iso of=/dev/sdb I've confirmed that the system boots and clonezilla runs from the flash drive. I want to store a clonezilla backup on the same flash drive clonezilla is running on, but I tried it and ran out of space, so I started looking at how to resize the mysterious partition type that was generated from the ISO. fdisk -l /dev/sdb .... Device Boot Start End Blocks Id System /dev/sdb1 * 1 111 113664 17 Hidden HPFS/NTFS .... I've tried using ntfsresize from the Debian ntfsprogs package. I'm trying gparted next, but thought I'd ask here if anyone knows a neat way to resize a partition created on flash from a liveCD image. Thanks in advance Jon ps. Assume Debian 6 please.

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  • How to free up block device that is mounted to an inaccessible place?

    - by Vi
    root@vi-notebook:~# cat /proc/mounts | grep raidy /dev/md0 /root/e/i/wpc2/boot/mnt/raidy reiserfs ro,nosuid,nodev,noexec,noatime 0 0 root@vi-notebook:~# umount -n /root/e/i/wpc2/boot/mnt/raidy umount: /root/e/i/wpc2/boot/mnt/raidy: Transport endpoint is not connected root@vi-notebook:~# mount /dev/md/raidy /mnt/raidy/ -t reiserfs -o nodev,nosuid,noexec,acl,noatime mount: /dev/md0 already mounted or /mnt/raidy/ busy The only workaround I found is: root@vi-notebook:~# losetup /dev/loop0 /dev/md/raidy root@vi-notebook:~# mount /dev/loop0 /mnt/raidy/ -t reiserfs -o nodev,nosuid,noexec,acl,noatime

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  • Limiting Failed SSH Logins

    - by nitins
    I would like to limit failure retries on my Fedora machine to 5. I think I can accomplish it with PAM. But was unable to to do this. I have referred to this article to do this http://www.puschitz.com/SecuringLinux.shtml Please provide suggestions

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  • Extremely high mysqld CPU usage with no active queries

    - by RadarNyan
    I have a VPS running Ubuntu 12.04 LTS with LEMP stack, followed the guide from Linode Library (since I'm using a Linode) to setup, and everything worked fine until now. I don't know what's wrong, but my CPU usage just goes up since a week ago. Today things getting really bad - I got 74% CPU usage so I went check and found that mysqld taking too much CPU usage (somewhere around 30% ~ 80%) So I did some Google Search, tried disable InnoDB, restart mysql, reset ntp / system clock (Isn't this bug supposed to happen more than a year ago?!) and reboot my VPS, nothing helped. Even with mysql processlist empty, I still get mysqld CPU usage very high. I don't know what I missed and have totally no idea, any advice would be appreciated. Thanks in advance. Update: I got these from running "strace mysqld" write(2, "InnoDB: Unable to lock ./ibdata1"..., 44) = 44 write(2, "InnoDB: Check that you do not al"..., 115) = 115 select(0, NULL, NULL, NULL, {1, 0}^[[A^[[A) = 0 (Timeout) fcntl64(3, F_SETLK64, {type=F_WRLCK, whence=SEEK_SET, start=0, len=0}, 0xbfa496f8) = -1 EAGAIN (Resource temporarily unavailable) hum... I did tried to disable InnoDB and it didn't fix this problem. Any idea? Update2: # ps -e | grep mysqld 13099 ? 00:00:20 mysqld then use "strace -p 13099", the following lines appears repeatedly: fcntl64(12, F_GETFL) = 0x2 (flags O_RDWR) fcntl64(12, F_SETFL, O_RDWR|O_NONBLOCK) = 0 accept(12, {sa_family=AF_FILE, NULL}, [2]) = 14 fcntl64(12, F_SETFL, O_RDWR) = 0 getsockname(14, {sa_family=AF_FILE, path="/var/run/mysqld/mysqld.sock"}, [30]) = 0 fcntl64(14, F_SETFL, O_RDONLY) = 0 fcntl64(14, F_GETFL) = 0x2 (flags O_RDWR) setsockopt(14, SOL_SOCKET, SO_RCVTIMEO, "\36\0\0\0\0\0\0\0", 8) = 0 setsockopt(14, SOL_SOCKET, SO_SNDTIMEO, "<\0\0\0\0\0\0\0", 8) = 0 fcntl64(14, F_SETFL, O_RDWR|O_NONBLOCK) = 0 setsockopt(14, SOL_IP, IP_TOS, [8], 4) = -1 EOPNOTSUPP (Operation not supported) futex(0xb786a584, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0xb786a580, {FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1 futex(0xb7869998, FUTEX_WAKE_PRIVATE, 1) = 1 poll([{fd=10, events=POLLIN}, {fd=12, events=POLLIN}], 2, -1) = 1 ([{fd=12, revents=POLLIN}]) er... now I totally don't get it x_x help

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  • .htaccess to nginx rewite

    - by Deepak
    please help me with changing this .htaccess to rginx rewite RewriteRule ^show.php/(.*)$ show2.php?img=$1 [L] RewriteRule ^out.php/([a-z]{1})(.*)$ out2.php?$1=$2&%{QUERY_STRING} [L] RewriteRule ^view.php/(.)$ view2.php?img=$1 [L] RewriteRule ^images.php/([a-z]{1})(.)$ images2.php?$1=$2&%{QUERY_STRING} [L] RewriteRule ^gallery/([0-9]+)-([^/])/(.)$ gallery.php?gal=$1&img=$3 [L] RewriteRule ^view/([0-9]+)-([^/])/(.)$ gallery_body.php?gal=$1&img=$3 [L]

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  • NFS confusion - writing many small files

    - by Antonis Christofides
    I have a Debian squeeze amd64 which is at the same time a NFS4 server and client (it mounts itself through NFS4). The local directory that leads directly to disk is /nfs4exports/mydir, whereas /nfs4mounts/mydir is the same thing mounted through NFS, using the machine's external IP address. Here is the line from fstab: 176.9.116.102:/mydir /nfs4mounts/mydir nfs4 soft 0 0 I have an application that writes many small files. If I write directly to /nfs4exports/mydir, it writes thousands of files per second; but if I write to /nfs4mounts/mydir, it writes 4 files per second or so. I can greatly increase speed if I add async to /etc/exports. (Writing a single large file to the NFS directory goes at more than 100 MB/s.) I am confused by the description of async in NFS. If my application accesses the local directory, system calls like write and close return even if caches have not been flushed to permanent storage. Apparently this is not true with NFS sync behaviour. However, with NFS async behaviour, even calls like fsync are ignored. Isn't it possible to work like local files, i.e. generally work asynchronously, but honour fsync and O_SYNC?

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  • installing and running google-chrome on an old Ubuntu 7.10 legacy system

    - by 12632
    I am trying to get google-chrome to work on Ubuntu 7.10. I installed it with --force-depends and got it to install, but now when I try to run it, I get this error: /usr/bin/google-chrome: error while loading shared libraries: libnss3.so: cannot open shared object file: No such file or directory Is there a way to still get google-chrome to load even without this dependency satisfied? This is an old system that needs to keep this old 7.10 Ubuntu version and I would like to have google-chrome if possible installed, even if it means no sound or other features that are not compatible.

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  • Restrict a port to a single app

    - by viraptor
    I'd like to restrict a range of udp ports to a single application (or a user). What I'd like to achieve is not simply blocking a bind() from other uids, but also remove the range from a pool that can be auto-assigned. For example, if someone tries to explicitly bind 12345, but doesn't run the specified app, they should get EPERM. If someone tries to bind an unspecified port, they should never try to bind 12345 at random. Is there any system that can help here? I tried browsing apparmor / selinux docs, but they seem to do the blocking part only.

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  • "sh: /usr/sbin/xenstored: not found" - But it's there?

    - by Matt H
    What would cause running the file /usr/sbin/xenstored to print sh: /usr/sbin/xenstored: not found However, the file /usr/sbin/xenstored is there and is not a symbolic link. Actually I should be running this as root. That prints a similarly odd message. sudo: unable to execute /usr/sbin/xenstored: No such file or directory By the way, xenstored is not a script, it's an ELF executable. My guess is that it's because I haven't gotten all the dependent libraries installed. However, I would expect it to say something like this: ./xenstored: error while loading shared libraries: libxenctrl.so.4.0: cannot open shared object file: No such file or directory Which is true of running xenstored on a system that doesn't have all the required libraries. Why do I get "not found" vs the much more useful "cannot open shared object file"?

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  • Why does cifs asks for su rights to write any data into it?

    - by Denys S.
    I'm mounting a windows share as follows: sudo mount -t cifs //192.168.178.49/public -o users,username=name,dom=domain,password=pword /mnt/nas Then I'm trying to create a simple file with some basic text: touch /mnt/nas/me.txt And get an error, however, the file is created (contains 0B of data though): touch: cannot touch ‘me.txt’: Permission denied With sudo it works flawless. How can I allow my current user to write data to the share? Is there a mount option?

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  • Installing checkinstall on x86_64 bit

    - by SephMerah
    I downloaded the source for check install. checkinstall-1.6.2.tar.gz. I then tar -xzvf checkinstall-1.6.2.tar.gz Then I make. It prints this error: [root@ip-50-63-180-135 checkinstall-1.6.2]# make for file in locale/checkinstall-*.po ; do \ case ${file} in \ locale/checkinstall-template.po) ;; \ *) \ out=`echo $file | sed -s 's/po/mo/'` ; \ msgfmt -o ${out} ${file} ; \ if [ $? != 0 ] ; then \ exit 1 ; \ fi ; \ ;; \ esac ; \ done make -C installwatch make[1]: Entering directory `/home/sofiane/checkinstall-1.6.2/installwatch' gcc -Wall -c -D_GNU_SOURCE -DPIC -fPIC -D_REENTRANT -DVERSION=\"0.7.0beta7\" installwatch.c installwatch.c:2942: error: conflicting types for 'readlink' /usr/include/unistd.h:828: note: previous declaration of 'readlink' was here installwatch.c:3080: error: conflicting types for 'scandir' /usr/include/dirent.h:252: note: previous declaration of 'scandir' was here installwatch.c:3692: error: conflicting types for 'scandir64' /usr/include/dirent.h:275: note: previous declaration of 'scandir64' was here make[1]: *** [installwatch.o] Error 1 make[1]: Leaving directory `/home/sofiane/checkinstall-1.6.2/installwatch' make: *** [all] Error 2 I searched extensively on this issue and this solution looks promising. Should I attempt to install checkinstall as an fpm? What would be the best way to go about that? Centos 6.3 x86_64

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  • How do you apply development practices like version control, testing and continuous integration/deployment to system administration?

    - by arex1337
    Imagine you're going to manage a number of servers with a number of different services that's used by a number of people. Now say you want to reconfigure or replace some software on one of those servers. Obviously you don't want to work on servers that are in production. If this was a code change, as a developer, I would make the change on my local development machine, test it locally and commit the change to a version control system. The changes could then be deployed in a staging environment, tested further and finally deployed in a production environment. It would also be easy for me to roll back, if necessary. Generally, or specifically, how do you achieve this in system administration? (The first thing that comes to mind is to use virtual machines and put virtual machine images in version control, but I'm sure there is a lot of literature and clever solutions I'm not presently aware of.)

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  • How to get ~/foo from /home/user1/foo?

    - by Claudius
    The Bash prompt supports the \w escape sequence, documented as \w the current working directory, with $HOME abbreviated with a tilde (uses the value of the PROMPT_DIRTRIM variable) Is there any way to get a similar abbreviation for an arbitrary string? That is, is there a general command that does something like the following, provided that HOME=/home/user1 /home/user1 ? ~ /home/user1/a/1 ? ~/a/1 /home/user2/b/2 ? ~user2/b/2 /root ? ~root Sure, I could try something ugly with sed, but that is unlikely to give me the result I want in any case. :-) The movitation behind this is that I would like to keep the titles in the tabs of my terminals as short as possible, hence abbreviate working directories where possible.

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  • Run a local command after closing an SSH connection?

    - by James B
    I've set up my zsh to update the XTerm title whenever I change directories. It's neat! Unfortunately I have one common problem, which is this: % cd foo; # title changes to "host1:~/foo" % ssh host2; # title changes to "host2:~" % pwd /home/user/foo # title is still "host2:~" I need to run some command anytime an ssh connection terminates, either chpwd, or cd ., or something similar. I don't think I can use an alias, because I'd need something like alias ssh=ssh $*; cd . but AFAICT you can't pick where the arguments go in an alias.

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  • *nix: Run as different user GUI

    - by singpolyma
    I want to run an application using only GUI as a different user. Not root. I want the user to be presented with a dropdown of system users, select one, enter the password, and the app gets run as that user. Like gksudo but user to run as specified in GUI and not as switch. Does such an app exist?

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  • Ubuntu 12.04 crash analysis - strange binary data on all open files at the moment of crash

    - by lanbo
    A couple of hours ago we got a system crash on Ubuntu 12.04. We checked all the log files and there is nothing suspicious to blame to. Last stuff that was logged was some dovecot activity. There are no kernel panic messages. Nothing. It is a new server (new hardware) we are testing before production. And because it is new hard, I'm suspicious the problem may be due to some faulty hardware. We already run memtester with no problem detected. I'll be happy to hear from other hardware testing tools (the machine has SSD). Anyway, the thing I wanted to ask you is a different one. The strange thing is on every open file at the moment of the crash we found the next sequence of symbols was written into them: "@^@^@^@^@^@^@...". For example, on the syslog log file we got: Apr 16 15:53:56 odyssey dovecot: pop3-login: Aborted login (auth failed, 1 attempts): user=<info>, method=PLAIN, rip=46.29.255.73, lip=5.9.58.177 ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^ [these continues for about 1000 chars...] ^@^@^@^@Apr 16 15:55:12 odyssey kernel: imklog 5.8.6, log source = /proc/kmsg started. We got all these symbols in all open files. These include: syslog, mail.log, kern.log, ... But also on some logs that are output by php scripts run in CRONs from user accounts (not root). So, any idea why all open files got these characters written during the crash? This is pretty bad since the crash corrupted many files (we don't even know which other ones may be affected). We are suspicious that all open files (in write mode maybe) at the moment of the crash got all these symbols inserted. Why is that? BTW [in case it helps], the system automatically rebooted after the crash but Apache did not start. There were not traces in /var/apache2/*log why apache did not start. After running a "service apache2 start" it started with no problems. Also, we rebooted the machine manually and Apache also started on reboot. But it did not start after the crash and no errors were reported. Thanks guys!

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  • Linux Mint 14 disponible en Release Candidate, "Nadia" sort avec Nemo le fork de Nautilus, les bureaux Cinnamon 1.6 et Mate 1.4

    "Nadia" : Linux Mint 14 disponible en Release Candidate avec Nemo, le fork de Nautilus les bureaux Cinnamon 1.6 et Mate 1.4 [IMG]http://www.franck-depan.fr/images/logo/systemes-exploitation/linux/distribution-mint/mint-logo.png[/IMG] L'équipe de développement de GNU/Linux Mint annonce la Release Candidate de la quatorzième version de sa distribution fondée sur Ubuntu Voici une brève liste des nouveautés :Mate 1.4 Cinnamon 1.6 Mint Desktop Manager Software Manager améliorations système Mate 1.4 Mate 1.4 renforce non seulement la...

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  • stunnel: SSL-to-SSL? (for smtp/imap)

    - by nonot1
    Hello, How can I configure stunnel to accpet SSL connections, and connect then to an SSL port on a different server? Here is my setup: Our ISP's server, "Mail Server", supports smtp/imap over SSL. (Not starttls. Just over ssl.) But, I have a bunch of client machines that will only trust a specific, internal, root certificate. Thus, they can not connect to "Mail Server". For these client machines, I'd like to make a dedicated "Mail Tunnel" host that uses stunnel to listen with an in-house signed SSL certificate, and just forward data to "Mail Server" using a 2nd SSL connection. Can this be done? What would be the specific steps for Ubuntu Server 10.10? (I'm not too familiar with persistent service configuration.) Thank you

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  • subversion: enforce TLS

    - by Daniel Marschall
    Hello, I am running subversion on a Debian Squeeze system with Apache2 and mod_dav for viewing the contents with a webbrowser. I want to enforce the usage of TLS, so that the login data and the SVN contents cannot be read from the connection. I have tried following: <Location /svn> DAV svn SVNParentPath /daten/subversion/ # our access control policy AuthzSVNAccessFile /daten/subversion/access_control # try anonymous access first, resort to real # authentication if necessary. Satisfy Any Require valid-user # how to authenticate a user AuthType Basic AuthName "Subversion repository" AuthUserFile /daten/subversion/.htpasswd # Test SSLRequireSSL RewriteEngine On RewriteCond %{SERVER_PORT} !443 RewriteRule ^svn/(.)$ https://www.viathinksoft.de/svn/$1 [R,L] </Location> at file /etc/apache2/conf.d/subversion.conf Alas, this does not work. There is no redirect and there is still a HTTP request working at /svn/(projectname)/(somefolder) . This SSL-enforce-policy should work for - viewing the contents with webbrowser - retrieve contents with TurtoiseSVN client - committing contents with TurtoiseSVN client Can you please help me? Regards Daniel Marschall

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  • APC module causing strange error

    - by clifgriffin
    When I run php -v I get: PHP Warning: PHP Startup: Unable to load dynamic library '/usr/lib64/php/modules/apc.so' - /usr/lib64/php/modules/apc.so: undefined symbol: php_pcre_exec in Unknown on line 0 This isn't my first rodeo. I've setup APC multiple times. This is a MediaTemple Dedicated Virtual 4.0 with Plesk 11. Plesk 11 is the only thing essentially different from the other servers I've set this up on. I've verified that pcre-devel is installed. I've compiled APC from source as well as used pecl to install it. No difference. I also tried downgrading to APC 3.0.19, with no love.

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