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+unhash [ -adfms ] name ...
+ Remove the element named name from an internal hash table. The
+ default is remove elements from the command hash table. The -a
+ option causes unhash to remove regular or global aliases; note
+ when removing a global aliases that the argument must be quoted
+ to prevent it from being expanded before being passed to the
+ command. The -s option causes unhash to remove suffix aliases.
+ The -f option causes unhash to remove shell functions. The -d
+ options causes unhash to remove named directories. If the -m
+ flag is given the arguments are taken as patterns (should be
+ quoted) and all elements of the corresponding hash table with
+ matching names will be removed.
+
+unalias [ -ams ] name ...
+ Removes aliases. This command works the same as unhash -a, ex-
+ cept that the -a option removes all regular or global aliases,
+ or with -s all suffix aliases: in this case no name arguments
+ may appear. The options -m (remove by pattern) and -s without
+ -a (remove listed suffix aliases) behave as for unhash -a. Note
+ that the meaning of -a is different between unalias and unhash.
+
+unfunction
+ Same as unhash -f.