/usr/bin/mkofm is in texlive-binaries 2017.20170613.44572-8ubuntu0.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 | #!/bin/sh
# Initial definition. For the moment only makes .tfm files.
mktextfm "$@"
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