alias

技巧

1. sudo 不能调用 alias 命令

alias sudo='sudo '

Bash only checks the first word of a command for an alias, any words after that are not checked. That means in a command like sudo ll, only the first word (sudo) is checked by bash for an alias, ll is ignored. We can tell bash to check the next word after the alias (i.e sudo) by adding a space to the end of the alias value.

https://www.gnu.org/savannah-checkouts/gnu/bash/manual/bash.html#Aliases https://askubuntu.com/questions/22037/aliases-not-available-when-using-sudo