2008-06-8, 11:14(-07), Citizen Jimserac:
> I'm using Debian Lenny and want to rename
> some files to add a dot just before the file extension
> so that the abcdefmht become abcdef.mht
>
> I tried this:
> find . -name '*.mht' -exec rename 's/*mht/*\.mht/' '{}' \;
>
> but it fails.
[...]

find . -name '*[!.]mht' -exec sh -c '
mv -i "${1%mht}" "${1%mht}.mht"' {} {} \;

With zsh:

autoload -U zmv
alias zmv+='noglob zmv -W'
# those previous lines typically in ~/.zshrc

zmv+ **/*[^.]mht **/*[^.].mht

--
Stéphane