go install
Make the file ~/.censor-shell as an INI file with the following content:
[nameofmyreplacement]
pattern = badword
replacement = goodword
[anotherpattern]
pattern = abc([a-z]+)ghi
replacement = zyx${1}tsr
You can specify any amount of replacement rules as you like. Patterns and replacement follow standard Go regexp formats.
Now open a new shell and execute the censor-shell command. You'll be able to see that all outputs are replaced dynamically:
> echo badword
goodword
> echo abcdefghi
zyxdeftsr