cd命令
实例
hling@hling:~$ cd /home/hling/桌面/huanghling@hling:~/桌面/huang$ cd ..hling@hling:~/桌面$ cd ..hling@hling:~$ cd 桌面hling@hling:~/桌面$ cd ~hling@hling:~$ cd -/home/hling/桌面hling@hling:~/桌面$ cd ..
