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  • Failed to su after making a chroot jail

    - by arepo21
    On a 64 bit CentOS host I am using script make_chroot_jail.sh to put a user in a jail, not permitting it to see anything expect it's home at /home/jail/home/user1. I did it typing this: sudo ./make_chroot_jail.sh user1 after, when trying to connect to user1 first i was getting an error like: /bin/su: user guest does not exist i have fixed this by copying some missed libraries: sudo cp /lib64/libnss_compat.so.2 /lib64/libnss_files.so.2 /lib64/libnss_dns.so.2 /lib64/libxcrypt.so.2 /home/jail/lib64/ sudo cp -r /lib64/security/ /home/jail/lib64/ But now, when trying to connect to user1 typing su user1 and then typing it's password, i am getting this error: could not open session So the question is how to connect to user1 in this situation? P.S. Here are the permissions of some files, this might be helpful in order to provide a solution: -rwsr-xr-x 1 root root /home/jail/bin/su drwxr-xr-x 4 root root /home/jail/etc -rw-r--r-- 1 root root /home/jail/etc/pam.d/su -rw-r--r-- 1 root root /home/jail/etc/passwd -rw------- 1 root root /home/jail/etc/shadow UPDATE1 After some modifications i managed to connect to user1, but the session closes immediately! I guess this a PAM issue, however cant find a way to fix it. Here the log entry for close action from /val/log/secure: Oct 6 15:19:42 localhost su: pam_unix(su:session): session closed for user user1 What makes the session to exit immediately after launching?

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  • Bash script to keep last x number of files and delete the rest

    - by Brady
    I have this bash script which nicely backs up my database on a cron schedule: #!/bin/sh PT_MYSQLDUMPPATH=/usr/bin PT_HOMEPATH=/home/philosop PT_TOOLPATH=$PT_HOMEPATH/philosophy-tools PT_MYSQLBACKUPPATH=$PT_TOOLPATH/mysql-backups PT_MYSQLUSER=********* PT_MYSQLPASSWORD="********" PT_MYSQLDATABASE=********* PT_BACKUPDATETIME=`date +%s` PT_BACKUPFILENAME=mysqlbackup_$PT_BACKUPDATETIME.sql.gz PT_FILESTOKEEP=14 $PT_MYSQLDUMPPATH/mysqldump -u$PT_MYSQLUSER -p$PT_MYSQLPASSWORD --opt $PT_MYSQLDATABASE | gzip -c > $PT_MYSQLBACKUPPATH/$PT_BACKUPFILENAME Problem with this is that it will keep dumping the backups in the folder and not clean up old files. This is where the variable PT_FILESTOKEEP comes in. Whatever number this is set to thats the amount of backups I want to keep. All backups are time stamped so by ordering them by name DESC will give you the latest first. Can anyone please help me with the rest of the BASH script to add the clean up of files? My knowledge of BASH is lacking and I'm unable to piece together the code to do the rest.

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  • Postfix multiple checks

    - by xBlue
    I want to achieve the following with Postfix: Run all emails through a black list Allow any clients sending to a list of domains Allow some clients sending to any domain This is what I have: (postfix is on 10.0.8.0 and some of the senders are 10.0.8.0 and 10.0.9.0) mynetworks_style = subnet smtpd_recipient_restrictions = check_recipient_access sqlite:/etc/postfix/access-bl.query, check_client_access hash:/etc/postfix/trusted_clients, check_recipie nt_access hash:/etc/postfix/local_domains, reject_unauth_destination, permit So, right now the black list works. File /etc/postfix/trusted_clients contains who can send anywhere (3), file /etc/postfix/local_domains contains where you can send (2). Those two are fine, they return properly. My problem is getting all three working together. Not sure if it's an ordering issue. Currently sending a test from 10.0.9.17 and I get Relay access denied. If I add: mynetworks = 10.0.8.0/24 10.0.9.0/24 then anyone can send anywhere, so #2 is not working. Postfix version is 2.10 on Ubuntu 14.04. Any ideas?

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  • Why does my $LD_LIBRARY_PATH get unset when using screen with bash?

    - by UltraNurd
    This is related to http://superuser.com/questions/27376/why-does-my-ld-library-path-get-unset-launching-terminal, but a different set of symptoms. First, /usr/bin/screen is setuid as per the other question. Second, the default shell on this system is /bin/tcsh for various historical reasons, and we're not allowed to chsh to /bin/bash, so I typically run bash manually immediately after login. Third, I almost always use screen, but I want ctrl-a ctrl-c in screen to create a new bash "tab", so I always invoke bash first. That is: {~} $ echo $SHELL /bin/tcsh {~} $ bash [~] echo $SHELL /bin/bash [~] screen -U [~] ...and when reconnecting: {~} $ echo $SHELL /bin/tcsh {~} $ screen -dUr [~] echo $SHELL /bin/bash [~] However, my $LD_LIBRARY_PATH is there in tcsh, there in bash, but empty once I run screen; it is still present if I just run screen from tcsh, but then I get new tcsh "tabs" when I use ctrl-a ctrl-c in screen. Any ideas?

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  • "eject" command not working..

    - by shadyabhi
    shadyabhi@shadyabhi-desktop:~$ eject -v eject: using default device `cdrom' eject: device name is `cdrom' eject: expanded name is `/media/cdrom' eject: `/media/cdrom' is a link to `/media/cdrom0' eject: `/media/cdrom0' is not mounted eject: `/media/cdrom0' is not a mount point eject: tried to use `/media/cdrom0' as device name but it is no block device eject: unable to find or open device for: `cdrom' shadyabhi@shadyabhi-desktop:~$ The tray doesnt open.. How do I open tray using command line?

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  • Automounting Active Directory home drives on a Linux server on login

    - by Ethan
    I've got a Centos 5.7 box authenticating against Active Directory through PBIS Open (the new LikeWise Open), which works well. Now, I'm trying to get the server to automount the user's AD home directory, located at //ad.server.dom/shares/home directories (Yeah, it's a space in the path. I didn't set this up). Each user has a directory in there with the same name as the user. I've tried to get pam_mount working, but it has a series of issues on RedHat and friends, and I can't seem to get that working. The directory does need to be automounted for the server to perform it's role. My reading on automount seems to suggest that there's no way to get it to do it's thing with authentication, though I'm happy to be proved wrong. I've looked at this resource, but it requires version RedHat (thus CentOS) 6 or higher, and newer packages than I have. I can manually (As root) mount the AD directory using the command mount.cifs "//ad.server.dom/Shares/home directories/testuser" /home/local/AD/testuser/nfs_mount/ -o username=testuser and when I log in as testuser, I can see all of the sample files in the nfs_share directory. Any tips towards the right direction would be highly appreciated. This is going to be on a server at a college, so it needs to be fairly stable, and would lead towards more Linux adoption there.

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  • Is it possible to format ps RSS (memory) output to be more human friendly?

    - by metasoarous
    Executing ps ux returns a nice list of process information, easy to grep through or watch. However, there doesn't seem to be much flexibility in the memory usage output; the RSS (resident set size) is printed in kB, which for large processes is hard to read (especially at a glance), and %MEM gives 100 × RSS / system_memory. The du utility has a lovely -h flag which prints space in a more user friendly fashion. I have not been able to find anything equivalent for ps. Is there a special formatting trick that can accomplish this?

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  • Ubuntu not installed-Please Remove installation media and close tray and press enter

    - by Ram
    I have downloaded Ubuntu 12.04.1 LTS 32 bit, burned it on DVD and tried to install it on my PC. My PC is running in Windows 7 Ultimate 32 bit mounted on the C: drive. Now I want install Ubuntu along with my Windows 7. When I boot Ubuntu through the CD, It boots and the Ubuntu install windows opens It offers "Try Ubuntu" and "Install Ubuntu". I choose "Install Ubuntu" Then I go on to install Ubuntu with Windows(First Option)-install It shows some blank screen with some lines, and says "Please Remove installation media and close tray and press enter" Then the PC restarts and runs Windows 7 same as before normally. But Ubuntu is not installed. How to solve this problem and install Ubuntu on my PC properly? Note: I am an Android Developer. So I need to install Ubuntu for my Android Development purpose.

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  • Configure error when installing php

    - by Emenims
    When installing php I configure it like so: ./configure --prefix=/wwwroot/php --with-apxs2=/wwwroot/bin/apxs --with-configure-file-path=/wwwroot/php --with-mysql --with-gd And a configure error shows up saying this: xml2-config not found. Please check your libxml2 installation. What's this all about? And how settle the problem?

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  • Look strange on gvim after applying Source Sans Pro font

    - by abcdabcd987
    I downloaded the Source Sans Pro font and install on my Fedora17(Xfce). I did mkfontscale, mkfontdir, fc-cache -fv, and after fc-list, could see it on the list. Then I changed guifont in gvim to Source\ Sans\ Pro\ 10, but it looks quite strange. And then I changed it to DejaVu\ Sans\ Mono\ 10, it looks nothing strange. So, why would this happend? And how to solve it? Thanks! Source Sans Pro DejaVu Sans Mono

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  • Missing NFS service link?

    - by Recc
    # ps ax | grep nfs 1108 ?        S<     0:00 [nfsd4] 1109 ?        S<     0:00 [nfsd4_callbacks] 1110 ?        S      0:00 [nfsd] 1111 ?        S      0:00 [nfsd] 1112 ?        S      0:00 [nfsd] 1113 ?        S      0:00 [nfsd] 1114 ?        S      0:00 [nfsd] 1115 ?        S      0:00 [nfsd] 1116 ?        S      0:00 [nfsd] 1117 ?        S      0:00 [nfsd] 4437 ?        S<     0:00 [nfsiod] 16799 ?        S      0:00 [nfsv4.0-svc] 18091 pts/1    S+     0:00 grep nfs But # service nfs status nfs: unrecognized service That'll be on Ubuntu 11.04 am I missing a sym link or something? How can I fix this quickly?

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  • How do I align the bottom edges of two monitors with xrandr?

    - by denaje
    I have two outputs that I'd like to use on my laptop: LVDS1 - 1366x768 HDMI1 - 1920x1080 I set my monitors up like so: xrandr --output LVDS1 --auto --output HDMI1 --auto --right-of LVDS1 This is all well and good, but my laptop sits considerably lower than my external monitor, and with the top edges of the screens being aligned, it makes the jump from one screen to the other rather unintuitive. Is there a way I can align the bottom edges instead? I thought I could use the --pos flag to do this, but I have tried and not seen any difference (perhaps I do not know how to use it properly). EDIT: Solved. Thanks to tink's link, I deconstructed the Python script and discovered the way to do this is as follows: xrandr --output LVDS1 --pos 0x312 # 312 = 1280 - 768 xrandr --output HDMI1 --pos 1366x0 Not sure I understand exactly what the --pos flags are doing here, but it at least works!

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  • Samba PDC share slow with LDAP backend

    - by hmart
    The scenario I have a SUSE SLES 11.1 SP1 machine as Samba master PDC with LDAP backend. In one share there are Database files for a Client-Server application. I log XP and Windows 7 machines to the local domain (example.local), the login is a little slow but works. In the client computers have an executable which opens, reads and writes the database files from the server share. The Problem When running Samba with LDAP password backend the client application runs VERY SLOW with a maximum transfer rate of 2500 MBit per second. If disable LDAP the client app speed increases 20x, with transfer rate of 50Mbit/sec and running smoothly. I'm doing test with just two users and two machines, so concurrency, or LDAP size shouldn't be the problem here. The suspect LDAP, Smb.conf [global] section configuration. The Question What can I do? I've googled a lot, but still have no answer. Slow smb.conf WITH LDAP [global] workgroup = zmartsoft.local passdb backend = ldapsam:ldap://127.0.0.1 printing = cups printcap name = cups printcap cache time = 750 cups options = raw map to guest = Bad User logon path = \\%L\profiles\.msprofile logon home = \\%L\%U\.9xprofile logon drive = P: usershare allow guests = Yes add machine script = /usr/sbin/useradd -c Machine -d /var/lib/nobody -s /bin/false %m$ domain logons = Yes domain master = Yes local master = Yes netbios name = server os level = 65 preferred master = Yes security = user wins support = Yes idmap backend = ldap:ldap://127.0.0.1 ldap admin dn = cn=Administrator,dc=zmartsoft,dc=local ldap group suffix = ou=Groups ldap idmap suffix = ou=Idmap ldap machine suffix = ou=Machines ldap passwd sync = Yes ldap ssl = Off ldap suffix = dc=zmartsoft,dc=local ldap user suffix = ou=Users

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  • Serve up PC hard drive as USB mass storage

    - by sheepsimulator
    Is there a software package available that can serve up a hard-drive internal to a PC and make it available over USB to other USB Master nodes as mass storage? Ex: take your C: or /dev/hda drive on a PC (let's call the computer PC-A), and run a driver program which makes your C: or /dev/hda drive available to external devices as USB mass storage. When you'd hook up another PC (PC-B) to PC-A via USB, it would detect a USB mass storage device, which is C: or /dev/hda on PC-A. Is this even possible? EDIT: I know that there are other ways of making data on a drive available between two different computers (eg. putting PC-A's hdd in a USB-drive-enclosure, or having PC-A make the hdd available via a network share). But I'd like to know if the method that I describe above is even technically possible.

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  • cgconfig.conf : setting root control group parameters

    - by delerious010
    I've got cpu, cpuacct and memory cgroups configured via /etc/cgconfig.conf ( cgconfig-bin on Lucid ). I can add new control groups, and assign processes to them however there does not seem to be a facility for changing the paramters of the root level memory cgroup ( the actual mount point ). How would one best set such parameters in a clean manner withoput c For example, I've the memory cgroup mounted to /var/run/cgroup/memory. I'd like to have /var/run/cgroup/memory/memory.use_hierarchy set to 1 on boot.

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  • could corosync can support unicast heartbeat mode?

    - by Emre He
    could corosync can support unicast heartbeat mode? from another thread in serverfault, some guy raised below corosync conf: totem { version: 2 secauth: off interface { member { memberaddr: 10.xxx.xxx.xxx } member { memberaddr: 10.xxx.xxx.xxx } ringnumber: 0 bindnetaddr: 10.xxx.xxx.xxx mcastport: 694 } transport: udpu } is this conf type means unicast mode? thanks, Emre

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  • Install Windows 8 from recovery disk on VirtualBox [on hold]

    - by user1032531
    About 6 months ago, I bought a desktop HP PC with Windows 8 from Costco. I made a recovery disk (actually, took 4 DVDs) of the operating system and copied down the product key. I then did a fresh Cento6 install on the machine. I know wish to operate Windows (8 I guess, but I would rather have 7) on a VirtualBox on the Centos box. Is this possible? Any recommendations where to start? Can I do so without re-installing all the HP baggage?

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  • Which mail clients can give reminders about unresponded emails?

    - by ulidtko
    In my daily e-mail often happens the following scenario: I send somebody an email which describes some problem and requests an action from the recipient. Typically, I wish to ensure that this action was taken, or at least somehow resolved; when this happens, the email recipient should notify me with a response email about what was done, and what was not and why. But, sometimes emails don't get read by the recipient, or he forgets to reply to me. At the same time, I cannot constantly keep in memory the list of all emails for which I was waiting an answer and still didn't receive it. So I wonder, is there in any email client such a feature which would allow me to somehow mark specific outgoing emails as "demanding reply"? The mail client could in this case notify me if any "demanding reply" emails still aren't replied for a long time.

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  • Increase text size in Ubuntu 10.04 due to having large resolution/monitors

    - by Sridhar Ratnakumar
    I have 24" dual monitors with 1920x1080 resolution on both of them. Consequently the text appears so small. I use the following text-intensive applications frequently: Web browser (Google Chrome) IDE (Komodo) Terminal (Gnome Terminal) Email (Thunderbird) I can configure text size on IDE, Terminal and Email. But for Chrome, it is not a good idea to set proportional font size because often one wants to see the entire (not just proportional fonts) site to be zoomed. So I am asking: Is it possible to increase DPI in Ubuntu (much like on Windows) so as to increase the text size across all apps? OR Is it possible to set permanent 'zoom' in Google Chrome, using a third-party extension maybe? I am using Ubuntu 10.04 (Lucid Lynx)

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  • Apache strace to hunt down a memory leak

    - by Zipp
    We have a server with a memory issue: the server keeps allocating itself memory and doesn't release it. We're running Apache. I set MaxReqsPerClient to a really low value just so the threads don't hold a lot of memory, but has anyone seen calls like this? Am I wrong in thinking that it's probably Drupal pulling too much data back from the cache in DB? read(52, "h_index\";a:2:{s:6:\"weight\";i:1;s"..., 6171) = 1368 read(52, "\";a:2:{s:6:\"author\";a:3:{s:5:\"la"..., 4803) = 1368 read(52, ":\"description\";s:19:\"Term name t"..., 3435) = 1368 read(52, "abel\";s:4:\"Name\";s:11:\"descripti"..., 2067) = 1368 read(52, "ions\";a:2:{s:4:\"form\";a:3:{s:4:\""..., 16384) = 708 brk(0x2ab554396000) = 0x2ab5542f5000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab55f653000 brk(0x2ab554356000) = 0x2ab5542f5000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab55f753000 brk(0x2ab554356000) = 0x2ab5542f5000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab55f853000 brk(0x2ab554356000) = 0x2ab5542f5000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab55f953000 brk(0x2ab554356000) = 0x2ab5542f5000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab55fa53000 brk(0x2ab554356000) = 0x2ab5542f5000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab55fb53000 brk(0x2ab554356000) = 0x2ab5542f5000 mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x2ab55fc53000 poll([{fd=52, events=POLLIN|POLLPRI}], 1, 0) = 0 (Timeout) write(52, "d\0\0\0\3SELECT cid, data, created, "..., 104) = 104 read(52, "\1\0\0\1\5E\0\0\2\3def\23drupal_database_nam"..., 16384) = 1368 read(52, ";s:11:\"granularity\";a:5:{s:4:\"ye"..., 34783) = 1368 read(52, ":4:\"date\";}s:9:\"datestamp\";a:9:{"..., 33415) = 1368 read(52, "\";i:0;s:15:\"display_default\";i:0"..., 32047) = 1368 read(52, "e as an integer value.\";s:8:\"set"..., 30679) = 1368 read(52, "label' pairs, i.e. 'Fraction': 0"..., 29311) = 1368 top (the procs just keep growing in memory..): 12845 apache 15 0 581m 246m 37m S 0.0 4.1 0:17.39 httpd 12846 apache 15 0 571m 235m 37m S 0.0 4.0 0:12.13 httpd 12833 apache 15 0 420m 117m 37m S 0.0 2.0 0:06.04 httpd 12851 apache 15 0 412m 113m 37m S 0.0 1.9 0:05.32 httpd 13871 apache 15 0 409m 109m 37m S 0.0 1.8 0:04.90 httpd 12844 apache 15 0 407m 108m 37m S 0.0 1.8 0:04.50 httpd 13870 apache 15 0 407m 108m 37m S 0.3 1.8 0:03.50 httpd 14903 apache 15 0 402m 103m 37m S 0.3 1.7 0:01.29 httpd 14850 apache 15 0 397m 100m 37m S 0.0 1.7 0:02.08 httpd 14907 apache 15 0 390m 93m 36m S 0.0 1.6 0:01.32 httpd 13872 apache 15 0 386m 91m 37m S 0.0 1.5 0:03.13 httpd 12843 apache 15 0 373m 81m 37m S 0.0 1.4 0:02.51 httpd 14901 apache 15 0 370m 75m 33m S 0.0 1.3 0:00.78 httpd 14904 apache 15 0 335m 29m 15m S 0.0 0.5 0:00.26 httpd

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