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Linux how to use BASH, many novices are not very clear about this, in order to help you solve this problem, the following editor will explain for you in detail, people with this need can come to learn, I hope you can gain something.

The function of Bash shell

Command editing capability (history):

Just press the up and down keys on the command line to find the first / last input instruction. where are so many instructions recorded? .bash _ history in your home folder.

Command and file completion: (benefits of [tab] button)

Command alias setting function: (alias)

Alias lm='ls-al'

Programmatic script: (shell scripts)

Query whether the instruction is a built-in command for Bash shell: type

Example 1: check whether the ls instruction is built into bash?

Variable function of [dmtsai@study ~] $type lsShell

Variable access and setting: echo, variable setting rules, unset

Echo $PATH

Set the variable:

[dmtsai@study ~] $echo ${myname}

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