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7.63 What should go in my PATH and MANPATH environment variables?

at least: /usr/bin /usr/contrib/bin /usr/bin/X11 /usr/contrib/X11/bin 
/usr/contrib/bin/X11 /usr/local/bin

If you have the HP ANSI C compiler installed: 
    /opt/ansic/bin /usr/ccs/bin /opt/CC/bin /opt/langtools/bin

And, for system management stuff: 
    /usr/sbin

Alternately, you can start with: 
    setenv PATH `cat /etc/PATH`         # for tcsh

at the beginning of your shell's startup 'rc' file. The "/etc/PATH" file 
is supposed to be updated every time new software is installed in "/opt". 
This will get everything mentioned above, except for "/usr/sbin". 

MANPATH works the same way:
    setenv MANPATH `cat /etc/MANPATH`

(Thanx to Brad Bass <bass@convex.hp.com>)