# Shell's command operators / separators.

A non-exhaustively list  of command operators / separators tested on bash and zsh both on MacOs Catalina and Ubuntu 20.04.
Taken from (Maxim Egorushkin's answer)[https://stackoverflow.com/a/5130889/3594287] on https://stackoverflow.com/a/5130889/3594287 

## Commands

### |
```shell
|
```

pipes (pipelines) the standard output (stdout) of one command into the standard input of another one. Note that stderr still goes into its default destination, whatever that happen to be.

### |&

```shell
|&
```

pipes both stdout and stderr of one command into the standard input of another one. Very useful, available in bash version 4 and above.

### &&
```shell
&&
```

 executes the right-hand command of && only if the previous one succeeded.

### ||
```shell
||
```

executes the right-hand command of || only it the previous one failed.

### ;
```shell
;
```

executes the right-hand command of ; always regardless whether the previous command succeeded or failed. Unless set -e was previously invoked, which causes bash to fail on an error.