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  • testdisk - recover partition table

    - by Evaggelos Balaskas
    I destroyed my partition table of my laptop. Testdisk reports the below Disk laptop.img - 250 GB / 232 GiB - CHS 30402 255 63 (RO) Partition Start End Size in sectors >P MS Data 435868 456606 20739 [NO NAME] P MS Data 19232600 19235479 2880 [NO NAME] D MS Data 41945087 83890143 41945057 D MS Data 57151486 168579069 111427584 D MS Data 67637246 141037565 73400320 D MS Data 151523326 193466365 41943040 D MS Data 170617328 170618223 896 D MS Data 170631168 170634047 2880 D MS Data 171338232 171344405 6174 [Boot] D MS Data 172008235 172231918 223684 [NO NAME] P MS Data 193466368 214437887 20971520 D MS Data 217321375 225321678 8000304 [root] D MS Data 224923646 308809725 83886080 [media] D MS Data 308809728 420237311 111427584 D MS Data 418910206 481824765 62914560 [vmimages] my partition table had 3 Primary Partitions. 1. WinXP Home 2. /boot 3. LVM inside LVM i had 9 or 10 LVM partitions One of them was my home (encrypted with luks) testdisk cant recover my partition table or any other partition. Partitions with [P] doesnt have any useful data. I want to use dd to extract the partitions and try to recover as many files i can. Any ideas of how i can extract eg. the [root] lvm partition from the above testdisk report ? I am afraid that my disk was also corrupted.

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  • traffic shaping for certain (local) users

    - by JMW
    Hello, i'm using ubuntu 10.10 i've a local backup user called "backup". :) i would like to give this user just a bandwidth of 1Mbit. No matter which software wants to connect to the network. this solution doesn't work: iptables -t mangle -A OUTPUT -p tcp -m owner --uid-owner 1001 -j MARK --set-mark 12 iptables -t mangle -A POSTROUTING -p tcp -m owner --uid-owner 1001 -j MARK --set-mark 12 tc qdisc del dev eth0 root tc qdisc add dev eth0 root handle 2 htb default 1 tc filter add dev eth0 parent 2: protocol ip pref 2 handle 50 fw classid 2:6 tc class add dev eth0 parent 2: classid 2:6 htb rate 10Kbit ceil 1Mbit tc qdisc show dev eth0 tc class show dev eth0 tc filter show dev eth0 does anyone know how to do it? thanks a lot in advance

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  • How to "ignore" username and password prompt in net use

    - by Mattisdada
    I have at the moment a logon.cmd script, that I'm using to map network drives to the users profile. It looks like this: ::Onboarding net use m: /delete net use m: \\BOB\onboarding ::Bookings net use n: /delete net use n: \\BOB\bookings ::Accounts net use j: /delete net use j: \\BOB\accounts It works fine up until it gets up to a folder that the current user cannot access, it then asks for a username and password instead of erroring and continuing. Notes: This very script used to work on another Samba PDC network, but I've moved it over to another server (Still Samba PDC) and now its breaking. Is there anyway for it to ignore the username/password prompt and just continue?

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  • Exploratory Question for Security Admins (/etc/passwd + PHP)

    - by JPerkSter
    Hi everyone, I've been seeing a few issues lately on a few of my servers where an account gets hacked via outdated scripts, and the hacker uploads a cPanel / FTP Brute forcing PHP script inside the account. The PHP File reads /etc/passwd to get the usernames, and than uses a passwd.txt file to try and brute force it's way in to 127.0.0.1:2082. I'm trying to think of a way to block this. It doesn't POST anything except "GET /path/phpfile.php", so I can't use mod_security to block this. I've been thinking of maybe changing permissions on /etc/passwd to 600, however I'm unsure how this will result in regards to my users. I was also thinking of rate-limiting localhost connections to :2082, however I'm worried about mod_proxy being affected. Any suggestions?

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  • Monit can't detect MySQL, but I can

    - by Matchu
    Monit is configured to watch MySQL on localhost at port 3306. check process mysqld with pidfile /var/lib/mysql/li175-241.pid start program = "/etc/init.d/mysql start" stop program = "/etc/init.d/mysql stop" if failed port 3306 protocol mysql then restart if 5 restarts within 5 cycles then timeout My application, which is configured to connect to MySQL via localhost:3306, is running just fine and can access the database. I can even use MySQL Query Browser to connect to the database remotely via port 3306. The port is totally open and possible to connect to. Therefore, I'm pretty darn certain that it's running. However, running monit -v reveals that Monit cannot detect MySQL on that port. 'mysqld' failed, cannot open a connection to INET[localhost:3306] via TCP This happens consistently, until Monit decides not to track MySQL anymore, as configured. How can I begin to troubleshoot this issue?

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  • Is it possible to use SELinux MCS permissions with Samba?

    - by Yuri
    Created a user1: adduser --shell /sbin/nologin --no-create-home user1 passwd user1 smbpasswd -a user1 smbpasswd -e user1 semanage login -a -s "unconfined_u" -r "s0-s0:c0" user1 Added a category c0 for the folder ./123 inside the Samba share chcat s0:c0 /share/123/ After that the user1 can't go into this folder: type=AVC msg=audit(1332693158.129:48): avc: denied { read } for pid=1122 comm="smbd" name="123" dev=sda1 ino=786438 scontext=system_u:system_r:smbd_t:s0 tcontext=unconfined_u:object_r:samba_share_t:s0:c0 tclass=dir But if remove the c0 category: restorecon -v /share/123/ user1 opens folder with no problem. Is I'm doing something wrong or Samba doesn't support SELinux MCS? Have installed on CentOS 6.2 are: samba3.i686 3.6.3-44.el6 @sernet-samba selinux-policy.noarch 3.7.19-126.el6_2.10 @updates selinux-policy-targeted.noarch 3.7.19-126.el6_2.10 @updates

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  • How to add message that will be read with dmesg?

    - by calandoa
    I am trying to write some custom messages in my dmesg output. I tried: logger "Hello" but this does not work. It exits without error, but no "Hello" appears int the output of: dmesg I am using a Fedora 9, and it seems that there is no syslogd/klogd daemon running. However, all my kernel messages are succesfully written in the dmesg buffer. Any idea?

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  • Cobalt Qube 3 Unresponsive

    - by Devin Gund
    I recently bought a used Cobalt Qube 3 server off of eBay. The seller listed it as working before it was shipped. After starting it up for the first time, the "Cobalt Networks" logo scrolled across the LCD screen (this is normal), but then it stayed there. It will not go away, and the server will not respond to any of the buttons besides turning it off. I read the manual, and it does not say anything about this normally occurring. If necessary, could anyone walk me through or provide links to a reset tutorial? I have the OS Restore CD. Please help? I'm not sure why my question is being downvoted but if you need any more information please comment.

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  • Managing an application across multiple servers, or PXE vs cfEngine/Chef/Puppet

    - by matt
    We have an application that is running on a few (5 or so and will grow) boxes. The hardware is identical in all the machines, and ideally the software would be as well. I have been managing them by hand up until now, and don't want to anymore (static ip addresses, disabling all necessary services, installing required packages...) . Can anyone balance the pros and cons of the following options, or suggest something more intelligent? 1: Individually install centos on all the boxes and manage the configs with chef/cfengine/puppet. This would be good, as I have wanted an excuse to learn to use one of applications, but I don't know if this is actually the best solution. 2: Make one box perfect and image it. Serve the image over PXE and whenever I want to make modifications, I can just reboot the boxes from a new image. How do cluster guys normally handle things like having mac addresses in the /etc/sysconfig/network-scripts/ifcfg* files? We use infiniband as well, and it also refuses to start if the hwaddr is wrong. Can these be correctly generated at boot? I'm leaning towards the PXE solution, but I think monitoring with munin or nagios will be a little more complicated with this. Anyone have experience with this type of problem? All the servers have SSDs in them and are fast and powerful. Thanks, matt.

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  • Hang while starting several daemons [solved]

    - by Adrian Lang
    I’m running a Debian Squeeze AMD64 server. Target runlevel after boot is runlevel 2, which includes rsyslogd, cron, sshd and some other stuff, but not dovecot, postfix, apache2, etc. The system fails to reach runlevel 2 with several symptoms: The system hangs at trying to start rsyslogd Booting into runlevel 1 works, then login from the console works Starting rsyslogd from runlevel 1 via /etc/init.d/rsyslog hangs Starting runlevel 2 with rsyslogd disabled works But then, logging in via console fails: I get the motd, and then nothing Starting sshd from runlevel 1 succeeds But then, I cannot login via ssh. Sometimes password ssh login gives me the motd and then nothing, sometimes not even this. Trying to offer a public key seems to annoy the sshd enough to not talk to me any further. When rebooting from runlevel 1, the server hangs at trying to stop apache2 (which is not running, so this really should be trivial). Trying to stop apache2 when logged in in runleve 1 does hang as well. And that’s just the stuff which fails all the time. RAM has been tested, dmesg shows no problems. I have no clue. Update: (shortened) output from rsyslogd -c4 -d called in runlevel 1 rsyslogd 4.6.4 startup, compatibility mode 4, module path '' caller requested object 'net', not found (iRet -3003) Requested to load module 'lmnet' loading module '/user/lib/rsyslog/lmnet.so' module of type 2 being loaded conf.c requested ref for 'lmnet', refcount 1 rsylog runtime initialized, version 4.6.4, current users 1 syslogd.c requested ref for 'lmnet', refcount now 2 I can kill rsyslogd with Strg+C, then. /var/log shows none of the configured log files, though. Update2: Thanks to @DerfK I still have no clue, but at least I narrowed down the problem. I’m now testing with /etc/init.d/apache2 stop (without an apache2 running, of course) which hangs as well and looks like an even more obvious failure. After some testing I found out that a file with one single line: /usr/sbin/apache2ctl configtest /dev/null 2&1 hangs, while the same line executed in an interactive shell works. I was not able to further reduce this line while, i. e. every single part, the stream redirections and the commando itself is necessary to reproduce the hang. @DerfK also pointed me to strace which gave a shallow hint about what kind of hang we have here: wait4(-1for the init scripts futex(0xsomepointer, FUTEX_WAIT_PRIVATE, 2, NULL for rsyslogd / apache2 binaries called by the init scripts The system was installed as a Debian Lenny by my hoster in autumn 2011, I upgraded it to Squeeze immediately and kept it up to date with Squeeze, which then used to be testing. There were no big changes, though. I guess I never tried to reboot the system before. Update3: I found the problem. My /etc/nsswitch.conf specified ldap as hosts lookup backup, which is not available at that time of the boot. Relying on dns solely fixes my boot problems.

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  • How to test server throughput

    - by embwbam
    I've always used apache benchmark to try to get a rough idea of how many requests/second my server can handle. I read that it was good, and it seemed to work well. Enter node.js, which is fully event-based, so it never blocks. If I run apache benchmark on a simple hello world server it can handle 2500 requests per second or so. However, if I put a timeout in the hello world function, so that it responds after 2 seconds, apache benchmark reports a dramatically reduced throughput: about 50/s. I'm running 100 concurrent connections with ab. If I increase the concurrency, it goes up. This makes sense, because apache benchmark is basically sending out requests in batches of 100, which come back every 2 seconds. 100 requests / 2 seconds = 50 requests / second If I increase the concurrency to about 400 or 500, it starts to crash. I don't think I've hit node.js's limit, I think I'm hitting a wall in my operating system on the number of open file descriptors or sockets or something. Any way I can get a good guess about how many requests my server can handle? I want to make sure the test computer isn't the one causing the problem.

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  • Setting background color in gvim

    - by petersohn
    I use a terminal with white text on black background (I just like it better), so I wrote the following line in my .vimrc file: set background=dark However, gvim has black on white text. How do I do either of the following: Set the background of gvim to black Check in .vimrc if I'm using gvim I tried this: I started up gvim, and typed echo &term. The answer was "builtin_gui". So I wrote the following into .vimrc: if &term == "builtin_gui" set background=light else set background=dark endif Somehow, it didn't work.

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  • black backgrounds appear grey on gnome-terminal

    - by Martin DeMello
    Running gnome under Ubuntu Lucid $ env | grep TERM TERM=xterm COLORTERM=gnome-terminal I had to edit both my .muttrc and my vim colorscheme to change the background color from black to none in order to get a proper black background (or, more accurately, to retain the terminal's default black background). Setting it to black resulted in a dark grey background. This only happens with gnome-terminal; konsole, xterm and rxvt are fine.

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  • Is the /etc/inittab file read top down?

    - by PeanutsMonkey
    When the init process is executed when the kernel has loaded, does it read the /etc/inittab file in a top down approach i.e. it executes each line as it appears in the file. If so and based on my reading and understanding, does this mean that it enters the documented run level and then launch sysinit process or vice versa? For example the common examples I have seen are id:3:initdefault: # System initialization. si::sysinit:/etc/rc.d/rc.sysinit

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  • Intel cpu hyperthreading on or off for ibm db2?

    - by rtorti19
    Has anyone ever done any database performance comparisons with hyper-threading enabled vs disabled? We are running ibm db2 and I'm curious if anyone has an recommendations for enabling hyper-threading or not. With hyper-threading enabled it makes it quite difficult to do capacity planning for cpu usage. For example. "With 8 physical cores represented as 16 "threads" on the OS and a cpu-bound workload, does that mean when your cpu usage hit's 50% you are actually running at 100%." What real benefits do I gain with leaving hyper-threading enabled on an intel server running DB2? Does hyper-threading help if you're workload is truly disk IO bound? If so, up to what percentage? These are the types of questions I'm trying to answer. Any thoughts?

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  • insserv: Script <SCRIPT_NAME> is broken: missing end of LSB comment.

    - by udo
    I am getting this error when running: insserv -r udo-startup.sh insserv: Script udo-startup.sh is broken: missing end of LSB comment. insserv: exiting now! The content of udo-startup.sh is this: #!/bin/bash ### BEGIN INIT INFO # Provides: udo-startup.sh # Required-Start: $local_fs $remote_fs $network $syslog # Required-Stop: $local_fs $remote_fs $network $syslog # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: - # Description: - ### END INIT INF ID=$(xinput list | grep -i touchpad | sed '/TouchPad/s/^.*id=\([0-9]*\).*$/\1/') xinput set-prop $ID "Device Enabled" 0 exit 0

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  • Owner of uploads directory is `www-data` but this prevents FTP access via PHP scripts

    - by letseatfood
    To allow write access to Apache, I needed to chown www-data:www-data /var/www/mysite/uploads to my site's upload folder. This allows me to delete files from the folder via unlink() in a PHP script. Unfortunately, this prevents another PHP script, which uses FTP functions, from working. I think it is because the FTP user is mike and now that the uploads directory is owned by www-data, mike cannot access it. I added mike to the group www-data, but this does not fix the issue. Can somebody advise me on how to allow PHP FTP functions to work in addition to file deletion using PHP's unlink() function?

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  • have a bash script remotely shutdown another computer on the lan

    - by gletscher
    Hi I want to write a bash script that when called shuts down another computer on the lan. Maybe using ssh? The other computer is an ubuntu machine. Now I'm not sure how to send e.g. a sudo shutdown -h now command from withing a bash script to the ssh after logging in. Also I'm not sure how to obtain the rights for the sudo command, hence how to handle the communication between the server and client from within a bash script. Any suggestions are greatly appreciated.

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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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  • why my server has a dir named "?"

    - by liuxingruo
    These are all the dirs in my server: ? bin boot dev etc home lib lost+found media media2 misc mnt net opt proc root sbin selinux srv sys tmp usr var why there is a "?" dir? Thanks very much. BTW: the touch command was found on my server(wiered). I list the bin dir: alsacard cp dd env hostname loadkeys more ps sed tcptraceroute alsaunmute cpio df ex igawk loadkeys.static mount pwd setfont traceroute6 arch csh dmesg false ipcalc logger mountpoint raw setserial tracert awk cut dnsdomainname fgrep kbd_mode login mv red sh view basename date doexec gawk keyctl ls netstat redhat_lsb_init sleep ypdomainname bash dbus-cleanup-sockets domainname gettext kill mail nice rm sort cat dbus-daemon dumpkeys grep ksh mailx nisdomainname rmdir stty chgrp dbus-monitor echo gtar ksh93 mkdir pgawk rpm su chmod dbus-send ed gunzip link mknod ping rvi sync chown dbus-uuidgen egrep gzip ln mktemp ping6 rview tar touch is missing, how can i get it back?

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  • fail2ban block ports rules iptable

    - by J Spen
    I just installed Ubuntu Server 14.04 and don't have much experience with IPtables. I am trying to get a basic setup going where I only accept SSH connections on port 22 and 2222. I actually have that working with no problem using fail2ban ssh. Then I wanted to block all other ports except 423 and 4242 but either method of DROPing all connections that are not listed seems not to work and it blocks me out of everything. Below is the setup that works: -P INPUT ACCEPT -P FORWARD ACCEPT -P OUTPUT ACCEPT -N fail2ban-ssh -A INPUT -p tcp -m multiport --dports 22,2222 -j fail2ban-ssh -A fail2ban-ssh -j RETURN I tried to change it either to: -P INPUT DROP -P FORWARD ACCEPT -P OUTPUT ACCEPT -N fail2ban-ssh -A INPUT -p tcp -m multiport --dports 22,2222 -j fail2ban-ssh -A fail2ban-ssh -j RETURN or: -P INPUT ACCEPT -P FORWARD ACCEPT -P OUTPUT ACCEPT -N fail2ban-ssh -A INPUT -p tcp -m multiport --dports 22,2222 -j fail2ban-ssh -A INPUT -j DROP -A fail2ban-ssh -j RETURN I have noticed that the rules for fail2ban-ssh are automatically added to my iptables on boot because if I save them with iptables-persistant they are entered twice. How do I go about blocking everything accept those 2 ports using fail2ban? Is it a bad fail2ban configuration or do I need to add the fail2ban-ssh -j Return somewhere else in my code.

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  • Nginx Forward SSL for single site

    - by Will.brown
    I have a nginx server setup and it works fine for http however i would like to bypass the proxy for https connection. I want it so that when someone goes to my ip https:// ip1 (Nginx server) it bypasses ngix and forwards all traffic to https:// ip2(webserver) i do not need ngix to do this for any ssl website just one particular website. SO Client to https:// ip1 to https:/ /ip2 to https:// ip1 to client pc I just want the nginx to not intercept the connection and forward it on and on return forward the connection to client Im guessing i do this by nat mascarade buy not exactly sure how to do it and if i will need to tell nginx to ignore ssl aswell can someone help me please this has gone me stuck

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