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Using gdiff only select lines that are common between two files

This commands will make it easier to select only common items between two files being compared. If your lines start with things other than lowercase a-z, adjust this Regex appropriately. Number of lines in the output has been set to no more than 10000, and should be adjusted as needed.
This is sample output - yours may be different.
-1

gdiff --unified=10000 input.file1 inpute.file2 | egrep -v "(^\+[a-z]|^\-[a-z])"| sort > outputfile.sorted

slashdot · 2009-06-18 20:35:00 8
burn an iso to cd or dvd
This is sample output - yours may be different.
-1

cdrecord -v path_to_iso_image.iso

eastwind · 2009-09-14 19:20:12 4
Command to find filesystem type

Show Sample Output
This is sample output - yours may be different.
```
/dev/sda7: Linux rev 1.0 ext4 filesystem data, UUID=5d91866d-17c4-4187-839e-0bf45619ca83 (needs journal recovery) (extents) (large files) (huge files)
```
-1

file -sL /dev/sda7

sandeepvreddy · 2012-12-20 07:38:20 4
Get summary of updateable packages on Debian/Ubuntu machines using salt stack
This is sample output - yours may be different.
-1

salt -G 'os_family:Debian' cmd.run ' /usr/lib/update-notifier/apt-check --human-readable'

hinnerk · 2013-06-22 22:55:04 9
Uncompress a directory full of tarred files (*.gz)

This is a little bash script that will take all files following the *gz pattern in the directory and apply the tar -zxvf command to them.
This is sample output - yours may be different.
-1

for i in *.tar.gz *.tgz; do tar -zxvf $i; done

bohemicus · 2009-02-18 10:58:12 8
List only the directories

No need for -l and the output can be sent directly into another function expecting directory names. Show Sample Output
This is sample output - yours may be different.
```
pub/
workspace/
```
-1

ls -F|grep /

romulusnr · 2009-10-08 16:35:15 4
bash script to zip a folder while ignoring git files and copying it to dropbox

Similar, but uses tarball instead of zip file
This is sample output - yours may be different.
-1

git archive HEAD | gzip > ~/Dropbox/archive.tar.gz

tamouse · 2011-06-08 09:44:07 3
random git-commit message

Put in your path (.bashrc or similar). Then instead of running '$ git-commit -m ' use '$ git-random'
This is sample output - yours may be different.
-1

git-random(){ gitRan=$(curl -L -s http://whatthecommit.com/ |grep -A 1 "\"c" |tail -1 |sed 's/<p>//'); git commit -m "$gitRan"; }

unixmonkey32483 · 2012-03-07 22:25:14 1006
Nice directory listings
This is sample output - yours may be different.
-1

alias ll="ls -lh --color=auto"

trivoallan · 2009-02-10 14:27:13 10
Check variable has been set

Works in all shells. Does not require a test. Handles like an assertion. Show Sample Output
This is sample output - yours may be different.
```
sh: VAR: unset variable
```
-1

: ${VAR:?unset variable}

arcege · 2009-09-14 19:41:01 4
SCP files to remote server using PEM file
This is sample output - yours may be different.
-1

scp -i /path/to/file.pem [local-files] root@[dest-host]:[dest-path]

mariusbutuc · 2011-08-24 18:47:44 7

OMG, you are a Gentoo junkie. -funroll-loops-me-harder ;-) http://ccache.samba.org/ ccache is a compiler cache, which speeds up your compiler on successive runs, because it caches intermediate compiled output. Show Sample Output

-1

watch ccache -s

piyo · 2009-02-13 17:16:32 12

Use dig instead of nslookup

It is a much better tool then nslookup for getting information about the any site.It has got better capability too.For reverse information please use the switch "-x" and the ip address. Show Sample Output

-1

dig google.com

unixbhaskar · 2009-08-28 04:32:52 3

Find files older than 60 days
This is sample output - yours may be different.
-1

find . -maxdepth 1 -type f -mtime +60 -ls

mack · 2011-04-26 01:11:07 7
Show all TODOs and a few relative lines after it.

This will recursively go through every file under the current directory showing all lines containing "TODO" as well as 10 lines after it. The output will be marked with line numbers to make it easier to find where the TODO is in the actual file.
This is sample output - yours may be different.
-1

grep -rnA 10 TODO *

blockcipher · 2011-09-28 16:26:14 3
Graphic mode for root

Just tape: sudo -s your passwd startx -- :1
This is sample output - yours may be different.
-1

startx -- :1

sudo · 2009-02-13 17:22:13 13
Put the wireless card into monitor mode

First you need to instal aircrack-ng Use this command if you need to put your wireless card into monitor mode. interface = wlan0 || wifi0 || ath0 et ceatera... channel = 6, 11, 10, 9 et ceatera
This is sample output - yours may be different.
-1

airmon-ng start <interface> <channel>

jie · 2009-02-18 11:46:36 8
Find a specific pdf file (given part of its name) and open it

This assumes there is only one result. Either tail your search for one result or add | head -n 1 before the closing bracket. You can also use locate instead of find, if you have locate installed and updated
This is sample output - yours may be different.
-1

evince "$(find -name 'NameOfPdf.pdf')"

RBerenguel · 2010-04-04 20:55:51 5
MS-DOS only: Enable variable expansion from inside of FOR loops with !varname!

Usually the MS-DOS cmd.exe processes in the whole FOR loop as one command and expands each var like %varname% in before (except the loop var of course). This command enables expansion of other vars than only the loop var during the FOR loop. The syntax of the var to expand is then !varname! inside the FOR loop. Use command endlocal to end the setlocal command. E.g. (only works from batch files, not from commandline directly): @echo off setlocal enabledelayedexpansion FOR %%A IN (*) DO ( set file=%%A echo !file! ) endlocal
This is sample output - yours may be different.
-1

setlocal enabledelayedexpansion

Marco · 2010-08-10 12:26:43 6
Singularize all files in a directory

Jan Nelson from Grockit came up with this for us when we needed to rename all of our fixtures.
This is sample output - yours may be different.
-1

for x in *s.yml; do mv $x `echo $x | sed 's/s\.yml/\.yml/'`; done

foobarfighter · 2009-03-10 17:51:19 11
Grep for a TAB

Grep for a TAB . -- www.fir3net.com --
This is sample output - yours may be different.
-1

grep $'\t' file.txt

felix001 · 2009-10-08 23:14:14 3
Find and delete thunderbird's msf files to make your profile work quickly again.
This is sample output - yours may be different.
-1

find ~/.thunderbird/*.default/ -name *.msf -print0 | xargs --no-run-if-empty -0 rm;

tersmitten · 2010-06-07 12:34:21 3
Remove all .svn folders

Removing .svn directories without a pipe
This is sample output - yours may be different.
-1

find . -name .svn -type d -exec rm -rf {} \;

PhillipNordwall · 2010-12-15 18:51:08 5
calculate sqrt(2) ==> 1.414213
This is sample output - yours may be different.
-1

dc -e '6k2vp'

kev · 2012-03-08 13:04:00 3
Batch remove protection from all pdf files in a directory

Replace YOURPASSWORDHERE with the pdf password. [qpdf needed]
This is sample output - yours may be different.
-1

mkdir -p temp && for f in *.pdf ; do qpdf --password=YOURPASSWORDHERE --decrypt "$f" "temp/$f"; done && mv temp/* . && rm -rf temp

bufferoverflow · 2013-06-25 18:41:51 11
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Get My Public IP Address

Automatic ssh Session Logger

A wrapper around ssh to automatically provide logging and session handling. This function runs ssh, which runs screen, which runs script. . The logs and the screen session are stored on the server. This means you can leave a session running and re-attach to it later, or from another machine. . . Requirements: * Log sessions on a remote server * Transparent - nothing extra to type * No installation - nothing to copy to the server beforehand . Features: * Function wrapper delegating to ssh - so nothing to remember - uses .ssh/config as expected - passes your command line option to ssh * Self-contained: no scripts to install on the server * Uses screen(1), so is: - detachable - re-attachable - shareable * Records session using script(1) * Configurable log file location, which may contain variables or whitespace L="$HOME" # local variable L="\$HOME" # server variable L="some space" . Limitations: * Log dir/file may not contain '~' (which would require eval on the server) . . The sessions are named by the local user connecting to the server. Therefore if you detach and re-run the same command you will reconnect to your original session. If you want to connect/share another's session simply run: $ USER=bob ssh root@server . The command above is stripped down to an absolute minimum. A fully expanded and annotated version is available as a Gist (git pastebin): https://gist.github.com/flatcap/3c42326abeb1197ee714 . If you want to add timing info to script, change the command to: $ ssh(){ L="\$HOME/logs/$(date +%F_%H:%M)-$USER";/usr/bin/ssh -t "$@" "mkdir -p \"${L%/*}\";screen -xRRS $USER script --timing=\"$L-timing\" -f \"$L\"";}

Setting global redirection of STDERR to STDOUT in a script

You have a script where =ALL= STDERR should be redirected to STDIN and you don't want to add "2>&1" at the end of each command... E.G.: $ ls -al /foo/bar 2>&1 Than just add this piece of code at the beginning of your script! I hope this can help someone. :)

replace XX by YY in the the current directory and cd to it. ( in ZSH )

If you are in /begin/path/with/XX/pattern cd XX YY will change your current directory to /begin/path/with/YY/pattern in ZSH

Use tee + process substitution to split STDOUT to multiple commands

Using process substitution, we can 'trick' tee into sending a command's STDOUT to an arbitrary number of commands. The last command (command4) in this example will get its input from the pipe.

remove empty lines in place with backup

Modify file in place to remove empty lines and create a backup of the original with the extension .bak

Suspend to ram

No need to be root to do that. Relies on UPower (previously known as DeviceKit-Power).

Get International Space Station sighting information for your city

This command outputs a table of sighting opportunities for the International Space Station. Find the URL for your city here: http://spaceflight.nasa.gov/realdata/sightings/

Find files that are older than x days

Find files that are older than x days in the working directory and list them. This will recurse all the sub-directories inside the working directory. By changing the value for -mtime, you can adjust the time and by replacing the ls command with, say, rm, you can remove those files if you wish to.

Remove orphaned dependencies on Arch

-Qdt Lists dependencies/packages which are no longer required by any packages -q Output only package name (not the version number) -R Remove package(s) Rest is self-explanatory. I just started out with Arch - so if there is any better/standard method to achieve the same - please suggest.

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