hash, rehash, unhash, hashstat — Evaluate the Internal Hash Table of the Contents of Directories
Synopsis
/usr/bin/hash [name]
/usr/bin/hash [- r] sh
hash [- r] [name...] csh
rehash unhash hashstat
ksh
hash [name...] Description
Hashing is a method of indexing information by using an algorithm that generates an index of values indicating the ordered position of each item. For example, when the C shell starts, it finds all of the commands in directories specified by the path environment variable and builds an internal hash table of full path names. Then, when you execute a command, the C shell uses the hash table instead of searching directly for the path. This hashing technique is designed to improve performance. However, if you ...
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