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[文本處理] 【我不知道的小知識點】1.命令執(zhí)行問題 [復(fù)制鏈接]

qimuzhi

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發(fā)表于 2015-09-30 09:42 |只看該作者 |倒序瀏覽

本帖最后由 qimuzhi 于 2015-09-30 09:47 編輯

ligf@hot ~/tmp/shell/run-commands $ cat f.sh
#!/bin/bash -
#===============================================================================
#
#       FILE: f.sh
#
#       USAGE: ./f.sh
#
# DESCRIPTION:
#
#    OPTIONS: ---
#  REQUIREMENTS: ---
#       BUGS: ---
#       NOTES: ---
#       AUTHOR: YOUR NAME (),
#  ORGANIZATION:
#    CREATED: 2015年09月30日 09:34
#    REVISION:  ---
#===============================================================================

CMD="ls && ls aaa && ls aasdf"
$CMD

ligf@hot ~/tmp/shell/run-commands $ ./f.sh
ls: cannot access &&: No such file or directory
ls: cannot access ls: No such file or directory
ls: cannot access aaa: No such file or directory
ls: cannot access &&: No such file or directory
ls: cannot access ls: No such file or directory
ls: cannot access aasdf: No such file or directory
ligf@hot ~/tmp/shell/run-commands $ ls && ls aaa && ls aasdf
f.sh
ls: cannot access aaa: No such file or directory
ligf@hot ~/tmp/shell/run-commands $
-------------------
上面的shell相信大家都看明白了吧？
這是為什么？script要如何才能實現(xiàn)和在terminal 直接敲命令的效果？反之要如何？