Linux目录的切换

pwd:显示当前所在目录

~：root目录

/：根目录

ls：查看当前目录下所有的文件和目录

cd usr 切换到该目录下usr目录

cd ../ 切换到上一层目录

cd / 切换到系统根目录

cd ~ 切换到用户主目录

cd - 切换到上一个所在目录（返回）

栗子

    yangw@codecompile:~/RK3288_Lakala/kernel/arch/arm/boot/dts$ cd -
    /home/yangw
    yangw@codecompile:~$ pwd
    /home/yangw
    yangw@codecompile:~$ cd - 
    /home/yangw/RK3288_Lakala/kernel/arch/arm/boot/dts
    yangw@codecompile:~/RK3288_Lakala/kernel/arch/arm/boot/dts$ pwd
    /home/yangw/RK3288_Lakala/kernel/arch/arm/boot/dts
    yangw@codecompile:~/RK3288_Lakala/kernel/arch/arm/boot/dts$ cd ~
    yangw@codecompile:~$ pwd
    /home/yangw
    yangw@codecompile:~$ cd /
    yangw@codecompile:/$ pwd
    /
    yangw@codecompile:/$ cd -
    /home/yangw