Environment & Shell Customization (Aliases/Functions/.Bashrc)

Stop your shell history from leaking sensitive secrets

🧩 The Challenge

Everyone has accidentally typed a database password or an API key directly into the terminal while rushing. It sits there in your .bash_history forever, waiting for the next auditor or script to stumble across it.

💡 The Fix

You can make your shell ignore specific commands that start with a space, so they never get written to the history file at all. It keeps your logs clean without changing how you actually work.

export HISTCONTROL=ignorespace

⚙️ Why It Works

Setting this environment variable means that if you type a space before your command, bash assumes you want to keep that line out of the history list entirely. It’s a lifesaver when you realize mid-command that you’re about to paste a credential.

🚀 Pro-Tip: Put a space before your `mysql` login and you’ll never have to worry about cleaning your history file again.

Linux Tips & Tricks | © ngelinux.com | 10/29/2026