3shell扩展1

incr

bash

bash

mkdir /usr/local/src/bash/{old,new,dist,bugs} chown

word

directory stack

tilde-prefix

If the tilde-prefix, sans

the tilde, consists of a number without a leading + or - , + is assumed

login name

Each variable assignment is checked for unquoted tilde-prefixes immediately following a : or the first = . In these

cases, tilde expansion is also performed. Consequently, one may use filenames with tildes in assignments to