命令名:pwd功能:查看当前所处的位置eg:renjg@renjg-HP-Compaq-Pro--MT:~$ pwd /home/renjg renjg@renjg-HP-Compaq-Pro--MT:~$ renjg@renjg-HP-Compaq-Pro--MT:/var/tmp$ pwd /var/tmp renjg@renjg-HP-Compaq-Pro--MT:/var/tmp$