Rename small part of multiple files in middle of name using Bash?

Question

I\'d just like to change this

cc211_AMBER_13062012i.II  cc211_GROMOS_13062012i.II
cc211_CHARM_13062012i.II  cc211_OPLS_13062012i.II

to

Answer 1

rename 's/_13/_15/' cc*

Should do what you want. The regular expression s/_13/_15/ replaces _13 by _15 in all files starting 'cc'.

$ ls
cc211_AMBER_13062012.II  cc211_GROMOS_13062012.II
cc211_CHARM_13062012.II  cc211_OPLS_13062012.II

$ rename 's/_13/_15/' cc*

$ ls
cc211_AMBER_15062012.II  cc211_GROMOS_15062012.II
cc211_CHARM_15062012.II  cc211_OPLS_15062012.II

This will only work with the newer perl version of rename. To check which version you have do man rename. If the top of the page says

Perl Programmers Reference Guide

you have the perl version. If it says:

Linux Programmer's Manual

you have the standard (older) version.

For the older version, the command should be:

rename _13 _15 cc*