linux shell dirname basename

[root@hadoopname ~]# clear
[root@hadoopname ~]# ll
total 136
-rw-------. 1 root root  2696 Jun 24 04:41 anaconda-ks.cfg
drwxr-xr-x. 2 root root  4096 Jun 24 06:13 Desktop
drwxr-xr-x. 2 root root  4096 Jun 24 06:13 Documents
drwxr-xr-x. 2 root root  4096 Jun 24 06:13 Downloads
-rwxr-xr-x. 1 root root    32 Dec  6 13:20 first
-rw-r--r--. 1 root root 39935 Dec  5 17:38 i.log
-rw-r--r--. 1 root root 39935 Jun 24 04:40 install.log
-rw-r--r--. 1 root root 10175 Jun 24 04:38 install.log.syslog
drwxr-xr-x. 2 root root  4096 Jun 24 06:13 Music
drwxr-xr-x. 2 root root  4096 Jun 24 06:13 Pictures
drwxr-xr-x. 2 root root  4096 Jun 24 06:13 Public
drwxr-xr-x. 2 root root  4096 Jun 24 06:13 Templates
drwxr-xr-x. 2 root root  4096 Jun 24 06:13 Videos
[root@hadoopname ~]# pwd
/root

   #  dirname: 取一个文件的存储路径，分两种情况

#仅仅是个文件名的

[root@hadoopname ~]# dirname first 
.

#带绝对路径

[root@hadoopname ~]# dirname /root/first
/root
[root@hadoopname ~]# 

[root@hadoopname ~]# basename i.log 
i.log
[root@hadoopname ~]# basename i.log log
i.
[root@hadoopname ~]#