Still doesn't work on Feisty...
kmos@bash:~$ grep -P s/foo/bar/; x grep: The -P option is not supported bash: x: command not found
x is a filename with "foolish bigfoot"
Still doesn't work on Feisty...
kmos@bash:~$ grep -P s/foo/bar/; x
grep: The -P option is not supported
bash: x: command not found
x is a filename with "foolish bigfoot"