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shell 字符串变量的截取

2018-03-09 16:45 204 查看

wangshumin@machine2:~$
wangshumin@machine2:~$ vim sh2
wangshumin@machine2:~$ sh sh2
12
shumin w
wangshumin@machine2:~$ vim sh2
wangshumin@machine2:~$ sh sh2
12
shumin w
shumin w
wangshumin@machine2:~$ vim sh2
wangshumin@machine2:~$ sh sh2
12
shumin w
wangshumin w
shumin w
wangshumin@machine2:~$ cat sh2
#!/bin/bash
v3="wangshumin w"
echo ${#v3}

echo ${v3#wang}
echo ${v3#wang*.}
echo ${v3#wang}
wangshumin@machine2:~$ vim sh2
wangshumin@machine2:~$ sh sh2
12
shumin w

shumin w
wangshumin@machine2:~$ cat sh2
#!/bin/bash
v3="wangshumin w"
echo ${#v3}

echo ${v3#wang}
echo ${v3#wang*w}
echo ${v3#wang}
wangshumin@machine2:~$ vim sh2
wangshumin@machine2:~$ sh sh2
12
shumin w

wangshumin@machine2:~$ cat sh2
#!/bin/bash
v3="wangshumin w"
echo ${#v3}

echo ${v3#wang}
echo ${v3#wang*w}
echo ${v3##wang*}
wangshumin@machine2:~$

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