As there are different file formats present for archiving and compressing files using different utilities. So, to make a uniform function for extracting those files can be helpful. Add the below piece of code in your .bash_profile or .profile file present in home directory to extract the data.
extract () {
if [ -f $1 ] ; then
case $1 in
*.tar.bz2) tar xvjf $1 ;;
*.tar.gz) tar xvzf $1 ;;
*.bz2) bunzip2 $1 ;;
*.rar) rar 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
}