All commands

Starts the Performance Monitor console that monitors the system load. It will help to observe and test the system or parts of the system and also help to find any problems.

tells you the number of lines in said file, and then tail the last 100 lines ( or how many are messed up) then u take the total amount of lines and then subract the 100 or so lines u DONT WANT, then do a head -n $new_number and then redirect it to new file.db

doskey is the Windows cmd.exe equivalent of the Unix alias. '$*' means 'all parameters'

This example is like alias l='ls -alrt': it will display files from oldest to newest, for one or more directories.

doskey /MACROS list macros defined for cmd.exe, like 'alias' list aliases defined for the current Unix shell.

Useful to quickly get back to the Windows root directory of the current drive from a sub-directory within that drive.

Works also without space between 'cd' and backslash: 'cd\' or 'cd \' have the same effect

Show device drivers and their properties, including digital signatures /si and in table format /fo.

Show message in file "welcome" to all logged in terminal users.

usage: renam

in a script you must replace $PPID with $(awk '{print $4}' /prod/$PPID/stat)

This command limits the oputut of git log to one-line per commit and an abbreviated commit ID.

find -printf '%u\n' | sort | uniq #just users

find -printf '%g\n' | sort | uniq #just groups

If you have tried to change your prompt and made a mistake, use this command to retrieve a standard prompt.

If you used the export command when you changed your prompt, also use it there:

export PS1='$PWD$ '

Solution to activate (or deactivate with false instead of true) the global mandatory proxy under Ubuntu (not tested elsewhere).

Others keys you can configure :

gconftool-2 --set "/system/http_proxy/host" --type string "

gconftool-2 --set "/system/http_proxy/port" --type int 8080

gconftool-2 --set "/system/http_proxy/ignore_hosts" --type list --list-type string ["localhost","127.0.0.1","*.local"]

gconftool-2 --set "/system/proxy/mode" --type string manual

When you need to work a long time in the same directory, which prompt is of the type:

bob@ubuntu:~/directory1/directory2/directory3/directory4/directory5$

it is better to hide all this with the command PS1='$'

To retrieve a normal prompt, type: PS1='$PWD$ '

watch the seconds of your life tick away - replace YYYY-mm-dd HH:MM:ss w/ your birthtime.

used in an if-then-else in case the default shell is ksh, not bash.

The $(basename ${0#-}) is handy to echo which shell and strip the dash some flavors put in front of "bash"

if [ $(basename ${0#-}) == "bash" ] ; then

export PS1='\[\e]0;\h \u \w\a\]\n\[\e[0;34m\]\u@\h \[\e[33m\]\w\[\e[0;32m\]\n\$ '

else

HOST=`hostname`

ESC=`echo "\033"`

BEL=`echo "\007"`

RAW=`echo "\r"`

export PS1='-${RAW}${ESC}]0;${HOST} ${USER}${BEL}-${ESC}[0;34m${USER}${ESC}[0m@${ESC}[0;34m${HOST%%.*}${ESC}[0;33m${ESC}[0m $ '

fi

this application monitors the apps you use most often and load them into memory with their libraries and other dependencies.

So now, when you launch Firefox or Thunderbird or OpenOffice, the display is immediate as on Mac.

Do ls with permissions written in octal form.

The example will create a directory called "

Caveats: @imports of css files will not be converted.

kill all processes of a program

Today

special thanks to XwZ :)