Difference between SH and bash
The Unix operating system's shells are bash and sh. Bash is similar to SH, but with additional capabilities and better syntax. Bash is an abbreviation for "Bourne Again Shell" and is an upgrade over SH (the original Bourne shell).
Shell scripting refers to programming in any shell, whereas Bash scripting refers to scripting in Bash alone. SH is a Unix/Unix-like command-line interpreter.
SH provides some built-in commands. bash is a superset of sh. Shell is a command-line interface that allows you to execute commands and shell programs. Shells are available in a number of flavors, much as operating systems are available in a variety of flavors. As a result, Shell serves as an interface between the user and the operating system, allowing the user to communicate with the device.
SH:
bash:
Note:
- The shell serves as a bridge between the user and the operating system.
- sh implements the shell interface.
- bash is a superset of sh.
SH:
sh is also called Bourne Shell. The POSIX standard describes sh as a command programming language. It is intended for UNIX or UNIX-like operating systems. It has many implementations. . sh is a forerunner to bash, and /bin/sh is a direct link to primary implementations. In most POSIX systems, it is a symbolic link.
sh is not a programming language itself. It is just a specification. This is a full description of the language's syntax and semantics. It doesn’t include an implementation.sh was created to replace prior UNIX shells. The majority of the syntax is identical to that of the ALGOL68 programming language.
Bash:
Bash, like sh, is a command programming language. Bash is now the default login shell on most Linux-based operating systems. It is an enhanced version of the sh system for GNU that serves as a replacement for the Bourne shell. Bash is sometimes referred to as a programming language. We can start Python in interactive mode and it will operate like a shell, but we can also run Python programs on any IDE.
Sh's superset is bash. This suggests that bash supports sh features and is more functional than sh. Despite the fact that most commands provide the same function as sh. The shell bash is not POSIX compatible. It is a POSIX shell language dialect. Bash may be executed in a text window and allows the user to interpret instructions to do a variety of activities. It combines the best and most useful features of the Korn and C shells, including directory manipulation, task management, aliases, and many more.
Bash, like GNU software, has several shells, including a version of csh. Bash is the default shell. Bash is designed to be a conformant implementation of the IEEE POSIX Shell and Tools specification (IEEE Standard 1003.1). Bash, like other GNU programs, is very portable. This works on any Linux/Unix system that has bash installed in the expected place. In terms of programming and interactive use, bash outperforms sh.
| Bash | SH |
| Bourne Again SHell | SHell |
| Developed by Brain Fox | Developed by Stephen R. Bourne |
| Successor of sh | Predecessor of bash |
| bash is the default SHELL | sh is the not default SHELL |
| It has more Functionality with up-gradation. | It has less functionality. |
| #!/bin/bash | #!/bin/sh |
| supports job controls. | does not support job control. |
| bash is not a valid POSIX shell. | sh is a valid POSIX shell. |
| Easy to use | not as easy as bash |
| less portable than sh. | more portable than bash. |
| Extended version of language | Original language |
| Bash scripting is scripting specifically for Bash | Shell scripting is scripting in any shell |
| supports command history. | does not support command history |