====== Bash Alias ======

Displays a reminder message at the specified time

    echo "DISPLAY=$DISPLAY xmessage convert db to innodb" | at 00:00

Define a quick calculator function

    =() { echo $(($*)); }

Define a quick calculator function

    ? () { echo "$*" | bc -l; }

Copy structure

    cd $srcdir && find -type d -exec mkdir -p $dstdir/{} \;

View advanced Sort options, Quick Reference Help Alias

    alias sorth='sort --help|sed -n "/^ *-[^-]/s/^ *\(-[^ ]* -[^ ]*\) *\(.*\)/\1:\2/p"|column -ts":"'

View all date formats, Quick Reference Help Alias

    alias dateh='date --help|sed -n "/^ *%%/,/^ *%Z/p"|while read l;do F=${l/% */}; date +%$F:"|'"'"'${F//%n/ }'"'"'|${l#* }";done|sed "s/\ *|\ */|/g" |column -s "|" -t'

Show ls colors with demo

    echo $LS_COLORS | sed 's/:/\n/g' | awk -F= '!/^$/{printf("%s \x1b[%smdemo\x1b[0m\n",$0,$2)}'

today’s Debian installed packages

<code>
grep -e $(date +%Y-%m-%d) /var/log/dpkg.log | awk '/install / {print $4}' | uniq 

</code>

Create a bash script from last n commands

    history | tail -(n+1) | head -(n) | sed 's/^[0-9 ]\{7\}//' >> ~/script.sh