#!/bin/bash

#1.

ls -l /usr/share/gtk*

ls -l /usr/share/*[0-9]*[0-9]*

#2

egrep '[0-9]+' /usr/share/dict/words

egrep '^i.*[A-Z].+$' /usr/share/dict/words

egrep '^[^aeiouAEIOU]+$' /usr/share/dict/words

egrep '.*[aeiouAEIOU]{2}.*' /usr/share/dict/words

egrep '.*ening$' /usr/share/dict/words | wc -w

egrep ".*'s$" /usr/share/dict/words | wc -w

egrep '.*[A-Z]$' /usr/share/dict/words | wc -w

#3

sed -r "s/('s)/s/g" /usr/share/dict/words

sed -r "s/(.*)(word)(.*)/\2\1\3/g" /usr/share/dict/words

sed -r "s/^([A-Z])(.*)(.)$/\L\1\E\2\U\3/g" /usr/share/dict/words