Recursively change file extensions in Bash

by

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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