Normal Aliases

This is useful, if you want to remove systemwide aliases from your config:

# Clean up unwanted system aliases and start from scratch.
unhash -am '*'

# fast directory change
alias ...='cd ../..'
alias ....='cd ../../..'
alias .....='cd ../../../..'
alias ......='cd ../../../../..'
alias .......='cd ../../../../../..'

# upgrade shortcut for debian users
[ -r /etc/debian_version ] && [ -x `which sudo` ] && alias upgrade='sudo apt-get update && sudo apt-get -u upgrade'

# vared variant which splits arrays onto separate lines
alias lvared="IFS=\$'\n' vared"

# After some commands, it is useful to avoid filename generation:
for com in alias expr find mattrib mcopy mdir mdel which ; do alias $com="noglob $com" ; done

# editing the last (newest file) in a directory
## HOWITWORKS:
## (. matches plain files, ^D disables the GLOB_DOTS option
## (no dot-files are included), om sorts the files by modification date,
## [1] selects the first of them.)
alias vil='vi *(.om[1]^D)'

# Very often I want to see a bunch of history entries instead of simply searching back:
alias hg='fc -l 0|grep' 

# Remove trash
alias rmold='rm -vf .*~ *~ \#*\#' # verbose, ignore errors and don't ask.
alias rmtex='rm -vf .*~ *~ *log *.nav *.snm *.toc  *.cp *.fn *.tp *.vr *.pg *.ky \#* *blg *ilg *.dvi *.aux;\
             rm -vfr ./auto/'
alias rmps='rm -vf *.ps'

Checking for options before setting them. Some Linux dists (Debian) will ship grep without support for perl regexp, so it's good to check it before setting it:

# GREP
if [[ 0 -eq `echo $SHELL|grep --perl-regexp sh &>/dev/null; echo $?` ]]
    then GRP='--perl-regexp'
else
    GRP='--extended-regexp'
fi
if [[ 1 -eq `grep --help|grep --count color` ]]
    then GRP='--color=auto '$GRP ;fi
alias grep='grep --ignore-case '$GRP
unset GRP