命令名:pwd

功能:查看当前所处的位置

eg:

renjg@renjg-HP-Compaq-Pro-6380-MT:~$ pwd
/home/renjg
renjg@renjg-HP-Compaq-Pro-6380-MT:~$ 
renjg@renjg-HP-Compaq-Pro-6380-MT:/var/tmp$ pwd
/var/tmp
renjg@renjg-HP-Compaq-Pro-6380-MT:/var/tmp$