Find control m characters and remove it

Question

Is there is any single line command to recursively find the .ctl file in all the directories and remove the control m characters from it?

Answer 1

Use find with sed.

With GNU sed:

find . -name "*ctl" -type f -exec sed -i 's,^M,,' "{}" \;

With BSD sed:

find . -name "*ctl" -type f -exec sed -i '' -e 's,^M,,' "{}" \;

^M in sed argument is a literal Control-M, not ASCII ^ followed M. Press Control-v and then M to enter it.