alias
===



## 

```shell
alias [-p] [name[=value] ...]
```

## 

- 
- 

## 

```shell
-p
name
value
```

### 

alias  true 

## 

```shell
# 
alias
alias -p

# 
alias ls
alias ls grep

# 
alias ls='ls --color=auto'
alias ls='ls --color=never' grep='grep --color=never'
```

## 

shell

`~/.bashrc`alias rm='rm -i'`source ~/.bashrc`

`~/.bashrc``/etc/bashrc`

> :
>
> CentOS7`/etc/bash.bashrc`CentOS7`~/.bashrc`
>
> ```shell
> if [ -f ~/.bash_aliases ]; then
>   . ~/.bash_aliases
> fi
> ```
>
> `.bash_aliases`


## 

- 
- ****

```shell
# 
unalias -a
# 
alias rm=rm -rf
#  bash: alias: -rf: not found
# aliasrm alias rm='rm'
```

```shell
# 
# 
unalias -a
# 
alias ls=ls --color=never
# 

# alias
# alias --color=never
# alias ls='ls'
# alias
```

## Q&A

Q

Aalias

Q`alias cd='ls' ls='cd'`

Acdls


### 

1. 
    -  `source` bash `alias`  `unalias` 
    -  `sh`  bash 
2. `unalias`
3.  `mv cp rm`  `-f`  `alias rm='rm -f'`
4. 
5.  bash  `help` 

### 

- [alias(1p) - Linux manual page](https://man7.org/linux/man-pages/man1/alias.1p.html)
- [Linux\[8\]alias](https://jingyan.baidu.com/article/ac6a9a5e6738422b653eac01.html)