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Stop Using Bash
(discuss.online)
- Use Oil Shell if you want a faster and more modern version of Bash that's compatible with it and offers more modern oil language.
- Use Zsh if you want better extendability and more plugins.
- Use Fish if you want perfect out of the box configuration and a more modern (and less verbose for most cases) scripting language.
- Use Dash/Ash if you want better speed and full POSIX compliance (no extension, no unimplemented features).
- Use Yash if you want better autocomplete but still faster than Bash.
- Use Xonsh if you want an awesome Python-based scripting experience and very nice autocomplete.
- Use Elvish if you want a more modern scripting language.
- Or use anything. Any shell will be better than Bash. Bash is slow, not POSIX compliant, and doesn't offer Zsh/Fish level autocomplete.
What is most likely to be standard on a base system image?
Depends on the OS.
Well some OS are more popular than others, eg top 6 here https://distrowatch.com/ what would be found over most base images?