Modify a group of files in place
owsed, described above, is derived from a script on page 154 of the excellent book
The Unix Programming Environment by Brian Kernighan and Rob Pike.
It is a script runs a sed editor command over its input file(s).
ow is a generalization of owsed. It runs an arbitrary command over a set of input file(s) and replaces each with the output of the command run on that file.
If ow is typed without any arguments it displays a brief usage message:
Usage: "ow command file(s)" modifies file(s) in-place
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