linux控制台小技巧

权限提升

当你遇到这样的问题时

$ apt-get update

E: Could not open lock file /var/lib/apt/lists/lock - open (13: Permission denied) 
E: Unable to lock directory /var/lib/apt/lists/ 
E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied) 
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

那就可以直接使用sudo !!马上对前面的命令进行提权，而无需重新打一遍