I'm trying to change the suffix of all files in a directory hierarchy. Trying to diagnose my problem I have run the following command:- find info -name '*.txt' -exec echo `basename {} .txt` \; A section of the output from the above command is as follows:- info/motorbikes/zzr1200service.txt info/motorbikes/luggage.txt info/motorbikes/index.txt info/motorbikes/restindex.txt info/motorbikes/zzr1200info.txt info/motorbikes/lifts.txt info/index.txt info/test/test1.txt info/test/test2.txt info/test/test3.txt So the `basename {} .txt` is doing nothing at all, why? Looking further it seems as if the `` inside the find are causing the problem as:- find info -name '*.txt' -exec basename {} .txt \; produces the expected output:- zzr1200service luggage index restindex zzr1200info lifts index test1 test2 test3 The actual command I want to execute is:- find info -name '*.txt' -exec mv `basename {} .txt`.rst \; to change the .txt suffix to .rst. Any ideas how to do it? -- Chris Green