How does `/bin/sh` differ from Bash?

/bin/sh and Bash (Bourne Again SHell) are both command-line interpreters, but they have some key differences:

1. Compatibility:

   • /bin/sh is often a symlink to a simpler shell (like Dash on Debian-based systems) that aims for POSIX compliance.
   • Bash is an enhanced version of the original Bourne shell (/bin/sh) and includes additional features.

2. Features:

   • Bash supports advanced features like command history, tab completion, and improved scripting capabilities (arrays, associative arrays, etc.).
   • /bin/sh typically has a more limited feature set, focusing on basic shell functionality.

3. Scripting Syntax:

   • Bash scripts can use features like [[ for conditional expressions, which are not available in all /bin/sh implementations.
   • Some Bash-specific syntax may not work in /bin/sh.

4. Interactive Use:

   • Bash is often preferred for interactive use due to its user-friendly features.
   • /bin/sh is generally used for scripting and system-level tasks where compatibility and simplicity are prioritized.

In summary, while both serve as shells, Bash offers more features and is more user-friendly, whereas /bin/sh focuses on compatibility and simplicity.