/useful-linux-command

useful-linux-command

You can add any commands or improve existing one However, you must follow the current pattern is:

THE_LINUX_COMMAND_EXPLANATION

THE_LINUX_COMMAND_1 THE_LINUX_COMMAND_2 ...

Find relatives

find string in file

find . -name MY_FILE_PATTERN | xargs grep 'MY_STRING'

same as above, but just with the file name

find . -name "MY_FILE_PATTERN" -exec grep -l MY_STRING {} ;

find string in file and give, with, before each file name, the number of time the MY_STRING appears in the file

find . -name "MY_FILE_PATTERN" | xargs grep 'MY_STRING' | awk -F: '{print $1}' | uniq -c

less on a source file with syntax highlighting (need highlight : http://www.andre-simon.de/doku/highlight/en/highlight.html)

highlight -l -A SOURCE_FILE | less -R

find string in specified path and file pattern

find . -ipath './MY_DIRECTORY/FOOBAR//.MY_EXTENSION' | xargs grep 'MY_STRING'

open files in editor which string match in files

gedit find . -ipath './MY_DIRECTORY/FOOBAR/*/*.MY_EXTENSION' | xargs grep 'MY_STRING' | awk -F: '{print $1}'

open files in editor which string match in files

find . -ipath './MY_DIRECTORY/FOOBAR//.MY_EXTENSION' -exec perl -pi -e 's/MY_ORIG_STRING/MY_REPLACED_STRING/' {} ;

replace string in files which strings match in files

find . -ipath './merlin-data/src//.xml' -exec perl -pi -e 's/http://hibernate.sourceforge.net//http://www.hibernate.org/dtd//' {} ;

Another way to replace string in files

perl -p -i -e 's/relativePath>../relativePath>../../g' find ./ -name pom.xml

delete files recursively

$ find . -name .DS_Store -delete

#Find all those pesky files above 20mb find . -size +20000k -exec du -h {} ;

media relatives

erase a CDRW

sudo cdrecord blank=all -immed dev=/dev/cdrw

mount an Iso file

mount -o loop -t iso9660 file.iso /media/iso

extract audio from a video (without reencoding it)

ffmpeg -i mandelbrot.flv -vn -acodec copy mandelbrot.mp3

Bash relatives

Delete last word from command line

CTRL + W

Delate current line from command line

CTRL + U

Logout current terminal

CTRL + D

Recursive search

CTRL + R

Clear screen

CTRL + L

Change under ubuntu the default color of directory that is other-writable (o+w) and not sticky, see: http://www.bigsoft.co.uk/blog/index.php/2008/04/11/configuring-ls_colors

echo "OTHER_WRITABLE 01;34" > ~/.dircolors

System relatives

display a desktop notification

notify-send "Title" "This is a message"

When the system's freezed :

Keep Left Alt & Print Screen pressed, then R, S, E, I, U, B (Raising a Skinny Elephant Is Utterly Boring)

Find broken symlinks in a specified directory

for i in find MY_DIRECTORY -type l; do [ -e $i ] || echo $i is broken; done

Get BIOS version

sudo dmidecode -s bios-version

Simply commands

kill a process by its window

xkill #And squeeze the trigger

Display relatives

Send display to specific output

xrandr --output HDMI1 --right-of LVDS1