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Very keen detective work.  For my version of tail the POSIXLY_CORRECT
doesn't seem to matter:

bash-2.05b$ set | grep POSIX
bash-2.05b$  tail -1 .bashrc
tail: `-1' option is obsolete; use `-n 1'
Try `tail --help' for more information.

But the _POSIX2_VERSION variable does seem to solve the problem.

bash-2.05b$  _POSIX2_VERSION=199209 tail -1 .bashrc
export FOO=barbash-2.05b$ 

But the more I look at this system the more I see that it is not in
its pristine state.  I'm no longer convinced that RHEL has the bad
tail, but maybe the administrator compiled his own version.

Thanks everyone,

Michael


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