Linux命令(108)之dirname

linux命令之dirname

1.dirname介绍

linux命令dirname是用来获取文件的指定路径

2.dirname用法

dirname [参数] NAME

dirname参数

参数	说明
-z	使用NUL而不是换行符分隔输出
--help	查看帮助信息
--version	查看版本信息

3.实例

3.1.获取文件的指定路径

命令：

dirname ztj.txt

OR

dirname /root/ztj.txt

OR

dirname /a/b/c/d

[root@rhel77 ~]# dirname  ./ztj.txt
.       ---当前目录
[root@rhel77 ~]# dirname /root/ztj.txt
/root
[root@rhel77 ~]# dirname /a/b/c/d
/a/b/c
[root@rhel77 ~]# 

3.2.使用NUL而不是换行符分隔输出

命令：

dirname -z /a/b/c/d

[root@rhel77 ~]# dirname -z /a/b/c/d
/a/b/c[root@rhel77 ~]# 

3.3.查看版本信息

命令：

dirname --version

[root@rhel77 ~]# dirname --version
dirname (GNU coreutils) 8.22
Copyright (C) 2013 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later .
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David MacKenzie and Jim Meyering.
[root@rhel77 ~]# 

3.4.查看帮助信息

命令：

dirname --help

[root@rhel77 ~]# dirname --help
Usage: dirname [OPTION] NAME...
Output each NAME with its last non-slash component and trailing slashes
removed; if NAME contains no /'s, output '.' (meaning the current directory).

  -z, --zero     separate output with NUL rather than newline
      --help     display this help and exit
      --version  output version information and exit

Examples:
  dirname /usr/bin/          -> "/usr"
  dirname dir1/str dir2/str  -> "dir1" followed by "dir2"
  dirname stdio.h            -> "."

GNU coreutils online help: 
For complete documentation, run: info coreutils 'dirname invocation'
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[root@rhel77 ~]#