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yash vs GNU Bash: catalog facts
yash	GNU Bash
Best for: Users who want a POSIX-compliant shell for portable scripting and daily use	Best for: Shell scripting and everyday interactive use on Unix-like systems
Free Free and open source.	Free Free software from the GNU Project.
macOS, Linux, Command line	macOS, Linux, Command line
Close adherence to the POSIX shell standard Interactive line editing All 3 strengths for yash Close adherence to the POSIX shell standard Interactive line editing Useful for testing portable shell scripts	Runs most existing sh scripts without modification Command-line editing, history and job control All 4 strengths for GNU Bash Runs most existing sh scripts without modification Command-line editing, history and job control Shell functions, aliases and indexed arrays Thorough documentation through info and man pages
Smaller ecosystem of plugins and configurations than bash or zsh Not a terminal emulator; it runs inside one	Fewer interactive conveniences out of the box than shells like zsh or fish Releases are distributed as source tarballs; most people get it from their system package manager
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0-or-later
No account needed	No account needed
Offline features available	Offline features available
Official website Full listing and sources Sources for yash github.com/magicant/yash Catalog checked October 2, 2026	Official website Full listing and sources Sources for GNU Bash gnu.org/software/bash Catalog checked October 1, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.