What are the skills of using history commands in linux

This article mainly introduces the skills of using history commands in linux. It is very detailed and has a certain reference value. Friends who are interested must finish reading it.

Techniques for using historical commands

Sharing tips for using several historical commands can improve your productivity.

!!: repeat the previous command;! n: repeat the N command in the history history, N can be viewed through history;! pw: repeat the most recent history command, starting with pw, which is very useful, and the editor uses it very frequently;! $: represents the last argument of the last command

Guess that most students have not used it! $, here is a simple example to let you feel its efficient use.

$vim / root/sniffer/src/main.c

Mv! $! $.bak

# equivalent to

$mv / root/sniffer/src/main.c / root/sniffer/src/main.c.bak

The current working directory is root. I want to change main.c to main.c.bak. Normally you may need to type the long parameter containing main.c twice, of course, you may choose to copy and paste directly.

And I can easily and elegantly change my name by using the! $variable, isn't it very hacker?

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