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This question already has an answer here:

I have the below list of files


that I need to rename to


Please help me out.

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marked as duplicate by terdon, slm, Bernhard, Joseph R., Anthon Nov 26 '13 at 18:53

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

up vote 30 down vote accepted

Most standard shells provide a way to do simple text substitution within shell variables. http://tldp.org/LDP/abs/html/parameter-substitution.html explains as follows:


First match of Pattern, within var replaced with Replacement.

So use this script to loop through all the appropriate files and rename each of them:

for file in aro_tty-mIF-*_opt
    mv -i "${file}" "${file/-mIF-/-mImpFRA-}"

I have added a -i option so you have the chance to confirm each renaming operation. As always, you should make a backup of all your files before doing any large amount of renaming or deleting.

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If you don't have Perl's rename:

perl -e '
FILE:for $file (@ARGV){
        ($new_name = $file) =~ s/-mIF-/-mImpFRA-/
        next FILE if -e $new_name;
        rename $file => $new_name
}' *_opt

If you do have Perl's rename:

rename 's/-mIF-/-mImpFRA-/' *_opt
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@Udhayakumar Why does the solution need to use mv? – Joseph R. Nov 26 '13 at 17:07

Before trying complex commands like the following, backup your files. You never know what a typo (mine or yours) can cause.

With mv (as you asked in comment --- rename as suggested in the other answer is probably safer, especially if you can have spaces or strange chars in your filenames) something of the style

for f in *_opt; do
    a="$(echo $f | sed s/-mIF-/-mImpFRA-/)"
    mv "$f" "$a"
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