# Bash Aliases and Functions for Fun and Profit

Was thinking might he helpful to share some of my .bashrc aliases and functions. Please share any good ones you use in yours!

```

###### Tea timer

alias teatimer='$(STEEP=300; sleep $STEEP; xmessage "Your tea is done") &'

###### Reload bashrc fast

alias rl='. ~/.bashrc'

###### Extract a file without typing whole extension

extract () {

if [ -f $1 ] ; then

case $1 in

*.tar.bz2) tar xvjf $1 ;;

*.tar.gz) tar xvzf $1 ;;

*.bz2) bunzip2 $1 ;;

*.rar) unrar x $1 ;;

*.gz) gunzip $1 ;;

*.tar) tar xvf $1 ;;

*.tbz2) tar xvjf $1 ;;

*.tgz) tar xvzf $1 ;;

*.zip) unzip $1 ;;

*.Z) uncompress $1 ;;

*.7z) 7z x $1 ;;

*) echo "don't know how to extract '$1'..." ;;

esac

else

echo "'$1' is not a valid file!"

fi

}

###### Add an "alert" alias for long running commands. Use like so:

# sleep 10; alert

alias alert='notify-send --urgency=low -i "$([ $? = 0 ] && echo terminal || echo error)" "$(history|tail -n1|sed -e '\''s/^\s*[0-9]\+\s*//;s/[;&|]\s*alert$//'\'')"'

###### Autocomplete ssh commands

complete -W "$(echo `cat ~/.bash_history | egrep '^ssh ' | sort | uniq | sed 's/^ssh //'`;)" ssh

###### shows list of repository keys

alias showkeys='sudo apt-key list'

##### show tcp/ip ports #####

alias ports='netstat -tulanp'

##### 5 pings will do #####

alias ping='ping -c 5'

###### find an unused unprivileged TCP port

function findtcp()

{

(netstat -atn | awk '{printf "%s\n%s\n", $4, $4}' | grep -oE '[0-9]*$'; seq 32768 61000) | sort -n | uniq -u | head -n 1

}

###### Geoip lookup (need geoip database: sudo apt-get install geoip-bin)

function geoip() {

geoiplookup $1

}

###### View the calender by typing the first three letters of the month.

alias jan='cal -m 01'

alias feb='cal -m 02'

alias mar='cal -m 03'

alias apr='cal -m 04'

alias may='cal -m 05'

alias jun='cal -m 06'

alias jul='cal -m 07'

alias aug='cal -m 08'

alias sep='cal -m 09'

alias oct='cal -m 10'

alias nov='cal -m 11'

alias dec='cal -m 12'

#### Large files fumction

function find_largest_files() {

du -h -x -s -- * | sort -r -h | head -20;

}

###### get IP address of a given interface

# Example: getip lo

# Example: getip eth0 # this is the default