Linux Learning Path: command aliases, history, and command lookup execution order

First, the command alias

Alias rm= ' Rm–i ': The prompt will appear at any time when the command is deleted; alias Vi=vim

Alias does not add parameters, so the command alias is displayed in the system.

Unalias Canceling aliases

Ii. Order of History

History 6 shows the last 6 records

-C clears the current Shell's history record

-W writes history to file (default: ~/.bash_history)

The maximum number of records is controlled by the variable histsize.

Description: The history command is automatically written to the user after logging out of the login: ~/.bash_history file, which reads the record after the user logs on to bash.

“！ "The Use of:

！ 6 implementation of sixth record

！！ Execute previous record

！ Man executes the most recent record that starts with man

Third, the order of Linux lookup execution commands is

Type–a Order of command execution results

Also in the following order:

Alias> commands in the built-in commands > $PATH variables

Linux Learning Path: command aliases, history, and command lookup execution order