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basename 和 dirname 绝对和相对路径
绝对路径
以正斜杠开始
完整的文件的位置路径
可用于任何想指定一个文件名的时候
相对路径名
不以斜线开始
指定相对于当前工作目录或某目录的位置
可以作为一个简短的形式指定一个文件名
基名:basename
目录名:dirname
[root@localhost ~]# basename basename: missing operand Try 'basename --help' for more information. [root@localhost ~]# basename --help Usage: basename NAME [SUFFIX] or: basename OPTION... NAME... Print NAME with any leading directory components removed. If specified, also remove a trailing SUFFIX. Mandatory arguments to long options are mandatory for short options too. -a, --multiple support multiple arguments and treat each as a NAME -s, --suffix=SUFFIX remove a trailing SUFFIX -z, --zero separate output with NUL rather than newline --help display this help and exit --version output version information and exit Examples: basename /usr/bin/sort -> "sort" basename include/stdio.h .h -> "stdio" basename -s .h include/stdio.h -> "stdio" basename -a any/str1 any/str2 -> "str1" followed by "str2" GNU coreutils online help: <http://www.gnu.org/software/coreutils/> For complete documentation, run: info coreutils 'basename invocation' [root@localhost ~]# basename /usr/bin/sort sort [root@localhost ~]# 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: <http://www.gnu.org/software/coreutils/> For complete documentation, run: info coreutils 'dirname invocation' [root@localhost ~]# dirname /usr/bin/ /usr [root@localhost ~]# dirname dir1/str dir1 [root@localhost ~]# [root@localhost ~]# dirname /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts [root@localhost ~]#