category: Linux/Bash/Shell
7 posts
How to Reload .zshrc and Fix Changes Not Taking Effect
Edited your .zshrc but nothing changed? Run source ~/.zshrc to reload it instantly. This guide also covers why your PATH or aliases may still not take effect: export syntax mistakes, startup file order, and macOS path_helper overrides.
2026-07-22
How to Fix "bad substitution" in Bash
Fix the "bad substitution" error in Bash. It means the shell (sh/dash) cannot parse a Bash-only parameter expansion. Fix it with a bash shebang or a POSIX rewrite.
2026-07-15
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How to Fix "syntax error near unexpected token" in Bash
Fix the Bash "syntax error near unexpected token" error: CRLF line endings, unmatched quotes or brackets, missing spaces, and finding the bad line with bash -n.
2026-07-15
How to Fix "zsh: command not found: brew" on macOS
Fix the "zsh: command not found: brew" error on macOS. Learn why it happens (Homebrew not installed or the PATH not set) and how to solve it, including the Apple silicon /opt/homebrew path.
2026-07-13
Unexpected Causes of “Permission denied” in Linux and How to Fix Them
Unexpected causes of the "Permission denied" error in Linux and how to fix them: missing execute permission, SELinux, mount options, ownership, and more.
2025-11-17
Customization Tips to make Bash/Zsh prompts faster and more comfortable
Speed up your Bash/Zsh prompt: find what makes it slow, cut Git status overhead, switch to a faster plugin manager, and use fzf and zoxide effectively.
2025-11-17
Handy "Regex Snippets" I Use All the Time in Solo Development
When working on personal projects, I often find myself repeatedly looking up the same regular expressions—email validation, URLs, dates, digits, whitespace removal, and more. Here’s a collection of practical, copy-and-paste–ready regex snippets that frequently appear across projects.The examples use JavaScript/TypeScript, but almost all of them work in any mainstream language. 1. Email validation (practical version) […]
2025-11-17