markdown [All About Shell]关于shell的信息#shell #bash #sh

Posted 2021-05-06

## sh 
*sh* — The Bourne shell command interpreter.  `Linux sh Command`

### About sh
*sh* is the command name of the Bourne shell, the standard command language interpreter of Unix and many Unix-like operating systems, including Linux.

#### sh syntax
`sh [-acefhikmnprstuvx] [arg] ...`

Links
[Linux sh command help and examples](https://www.computerhope.com/unix/ush.htm)

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## Bash
bash is an sh-compatible command language interpreter that executes commands read from the standard input or from a file. bash also incorporates useful features from the Korn and C shells (ksh and csh).

[Computer Hope Bash](https://www.computerhope.com/unix/ubash.htm)
*Bash* Short for "Bourne-Again Shell," bash is a Unix shell. 

#### Description
bash is an sh-compatible command language interpreter that executes commands read from the standard input or from a file. bash also incorporates useful features from the Korn and C shells (ksh and csh).

bash is intended to be a conformant implementation of the Shell and Utilities portion of the IEEE POSIX specification (IEEE Standard 1003.1). bash can be configured to be POSIX-conformant by default.

#### bash syntax
```
bash [options] [file]
```