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本帖最后由 hjfeng1988 于 2014-10-17 16:51 编辑
回复 9# Buring__
应该是- [root@localhost ~]# echo $var
- 91ios_A18_201408111405
- [root@localhost ~]# echo ${var:0:-4}
- -bash: -4: substring expression < 0
- [root@localhost ~]# bash --version
- GNU bash, version 4.1.2(1)-release (x86_64-redhat-linux-gnu)
复制代码- [root@localhost ~]# echo $var
- 91ios_A18_201408111405
- [root@localhost ~]# echo ${var:0:-4}
- 91ios_A18_20140811
- [root@localhost ~]# bash --version
- GNU bash, version 4.2.45(1)-release (x86_64-redhat-linux-gnu)
复制代码 你这玩的是centos 7 |
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