Recursively change file extensions in Bash

Question

I want to recursively iterate through a directory and change the extension of all files of a certain extension, say .t1 to .t2. What is the bash command for doing this?

Answer 1

Use:

find . -name "*.t1" -exec bash -c 'mv "$1" "${1%.t1}".t2' - '{}' +

If you have rename available then use one of these:

find . -name '*.t1' -exec rename .t1 .t2 {} +

find . -name "*.t1" -exec rename 's/\.t1$/.t2/' '{}' +

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For a single file use the + delimiter and for renaming all files at once use the ; delimiter. Example: For a single file

find . -name "*.t1" -exec bash -c 'mv "$1" "${1%.t1}".t2' - '{}' +

And for all files in the scope of the find command:

find . -name "*.t1" -exec bash -c 'mv "$1" "${1%.t1}".t2' - '{}' \;