Linux shell command

Alias:

Alias ll= "Ls-l"

Steps to find the command:

1. If you are using a relative command (such as./command directly executing the command file in the current directory), locate the file directly in the current directory and execute it.
2. Absolute command (such as/usr/mysql/command), then execute the file directly.
3. If you do not use an absolute path, there is no./, first look at the alias that has no settings, otherwise go to the PATH environment variable configuration to look for, and then execute the first found file.

Linux shell command