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From: sinclair@dcs.glasgow.ac.uk (Duncan Sinclair)
Newsgroups: comp.unix.bsd
Subject: Re: binaries are unavailable when moved to /usr/bin until re-logon
Message-ID: <BuzpEM.9HJ@dcs.glasgow.ac.uk>
Date: 22 Sep 92 17:18:21 GMT
References: <1992Sep21.175158.25399@Saigon.COM> <D496JN@mailgzrz.tu-berlin.de> <ellis.717163328@nova>
Organization: Glasgow University Computing Science Dept.
Lines: 26
ellis@nova.gmi.edu (Stew Ellis) writes:
>jaenicke@emserver.ee.tu-berlin.de (Lutz Jaenicke) writes:
>>In article <1992Sep21.175158.25399@Saigon.COM> David.Fox@Saigon.COM writes:
>>> [[ Why can't I execute newly installed programs? ]]
>>Try rehash, .....
>Or use a Bourne shell related shell such as bash, ksh or zsh (not sh).
>These shells offer many of the same features as tcsh, but do not hash the
>path, therefore they re-search the path each time you enter a command line.
bash, ksh, zsh and modern sh all hash their path. The difference
is that they will go to the disk when the hashed path fails.
>There used to be a big win for having the hash, but now computers are at
>least an order of magnitude faster.
It still is, with memory cheap, and disks slow (not to mention NFS,
and servers that vanish), hashing is very much a positive thing
in this modern age.
--
Duncan Sinclair | Try one sinclair@dcs.glasgow.ac.uk
Computing Science Research Student | of these: sinclair@uk.ac.glasgow.dcs
University of Glasgow |..!mcsun!ukc!uk.ac.glasgow.dcs!sinclair
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