/etc/profile: avoid multiple /usr/bin in PATH

[Helmut Karlowski]

Am 08.12.2015, 22:31 Uhr, schrieb Helmut Karlowski:

>>> Yes, but why is this a problem?  Note that bash will set it anyway if
>>> not present.
>
> All shells set it only when run as login-shell.

Wrong: Only bash gives it a value - ksh and dash export SHELL with no  
value if none present. And IMHO SHELL should not be /bin/bash by default.

-Helmut

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