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#posix

3 posts

Shell & TerminalHow-To July 11, 2026 3 min read

How to Write Robust, Portable POSIX Shell Scripts

A complete walkthrough writing shell scripts that run correctly under any POSIX-compliant shell — not just whichever one happens to be installed on your own development machine.

#howto#posix#scripting

Shell & TerminalNews July 11, 2026 2 min read

Ubuntu Adopts Dash as Default /bin/sh, Exposing Bashisms Everywhere

Ubuntu 6.10 switched its default /bin/sh from Bash to the much stricter Dash in October 2006, purely for faster boot-time script execution — and immediately surfaced years of accumulated non-portable shell scripts across the ecosystem.

#news#dash#ubuntu

Shell & TerminalDeep Dive July 11, 2026 3 min read

Bash vs. Zsh vs. sh: What Actually Differs Between POSIX Shells

They all accept most of the same basic commands, which is exactly what makes their real differences easy to miss until a script written for one breaks silently on another.

#deep-dive#bash#zsh