Commands using ipcs sorted by votes

Commands using ipcs (4)

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Clear IPC Message Queue
This is sample output - yours may be different.
0

ipcs -a | grep 0x | awk '{printf( "-Q %s ", $1 )}' | xargs ipcrm

tiagofischer · 2010-01-28 12:15:22 4
Remove all unused shared memory segments for current user

It can work for message queue, semaphore set or shared memory just changing the parameter.
This is sample output - yours may be different.
0

ipcs -ma | awk '/^m / { if ($9 == 0) { print $2 }}' | xargs -n 1 ipcrm -m

keymon · 2011-07-26 15:53:59 7
Remove semaphores

Solves these pesky errors you see in the Apache log: [Fri Jun 28 17:51:00 2013] [emerg] (28)No space left on device: Couldn't create accept lock (/monsoon/opt/apache2/logs/accept.lock.356) (5) Naturally, can be used to get rid of other semaphores. Note: change the apache user in accordance to your ENV. Show Sample Output
This is sample output - yours may be different.
```
It works quietly, unless you have no sem IDs attached to this user [in this case, apache]
```
0

ipcs -s | grep apache | awk ' { print $2 } ' | xargs ipcrm sem

kernel01 · 2013-08-12 16:29:32 199
Remove all message queues owned by user foo
This is sample output - yours may be different.
0

ipcs -q | grep foo | awk '{print $2}' | xargs -I ipcid ipcrm -q ipcid

eko · 2013-08-29 15:08:13 15

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Change size of lots of image files.

Imagemagick library is used.

String to binary

Cool but useless.

Recompress all files in current directory from gzip to bzip2

Find all .gz files and recompress them to bz2 on the fly. No temp files. edit: forgot the double quotes! jeez!

Protect against buffer overflow

This command solve the problem ping: sendmsg: No buffer space available to.

Get AWS temporary credentials ready to export based on a MFA virtual appliance

You might want to secure your AWS operations requiring to use a MFA token. But then to use API or tools, you need to pass credentials generated with a MFA token. This commands asks you for the MFA code and retrieves these credentials using AWS Cli. To print the exports, you can use: `awk '{ print "export AWS_ACCESS_KEY_ID=\"" $1 "\"\n" "export AWS_SECRET_ACCESS_KEY=\"" $2 "\"\n" "export AWS_SESSION_TOKEN=\"" $3 "\"" }'` You must adapt the command line to include: * $MFA_IDis ARN of the virtual MFA or serial number of the physical one * TTL for the credentials

geoip information

geoip from maxmind try to get the small utility via: apt-get install geoip

list files recursively by size

Generate a random password 30 characters long

According to the gpg(1) manual: --gen-random 0|1|2 count Emit count random bytes of the given quality level 0, 1 or 2. If count is not given or zero, an endless sequence of random bytes will be emitted. If used with --armor the output will be base64 encoded. PLEASE, don't use this command unless you know what you are doing; it may remove precious entropy from the system! If your entropy pool is critical for various operations on your system, then using this command is not recommended to generate a secure password. With that said, regenerating entropy is as simple as: $ du -s / This is a quick way to generate a strong, base64 encoded, secure password of arbitrary length, using your entropy pool (example above shows a 30-character long password).

Install pip with Proxy

Installs pip packages defining a proxy

list all opened ports on host

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Commands using ipcs (4)

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