View source for Bash-rarely-used-options

Suspect they will be version dependent, but maybe not.  

[https://stackoverflow.com/questions/4168371/how-can-i-remove-all-text-after-a-character-in-bash | Original link]

<pre>
In Bash (and ksh, zsh, dash, etc.), you can use parameter expansion with % which will remove characters from the end of the string or # which will remove characters from the beginning of the string. If you use a single one of those characters, the smallest matching string will be removed. If you double the character, the longest will be removed.

$ a='hello:world'

$ b=${a%:*}
$ echo "$b"
hello

$ a='hello:world:of:tomorrow'

$ echo "${a%:*}"
hello:world:of

$ echo "${a%%:*}"
hello

$ echo "${a#*:}"
world:of:tomorrow

$ echo "${a##*:}"
tomorrow
</pre>
[[Category:bash]]