[throwaway8941]

For tmux users: put something like this in your .tmux.conf on production servers:

    set -g window-style 'fg=red,bg=black'

It will color the text red, hopefully reminding you to be extra careful. Adjust according to your preferences.

One other "defensive scripting" trick I frequently use is starting any `rm` command with `ls`, double checking its output (or triple checking if it's a recursive one), and then replacing `ls` with `rm`. It barely takes any extra time if you're proficient with emacs-style readline hotkeys:

    C-a M-d rm C-m

[gryfft]

In this vein, I set my PS1 to bold red capital letters on bastion hosts and alias sudo="echo 'You're on a jump box moron :p'"

I do the tmux color trick too-- color coded by environment for each bastion.

[PeterisP]

Something like this to obviously distinguish environments is good practice - at one company we implemented scripts for terminal color-coding like this after some downtime caused by a destructive backup restore accidentally being run in the production environment instead of an acceptance testing system, which was in all aspects identical to the production system.

And I've seen a solution for more secure environments where physical separation was used with the operator having separate monitors/keyboards, and the "important" system having a different color keyboard and monitor frame.

[KajMagnus]

That's nice — I usually start my commands with `# ` but then there's no tab completion. I'll try `ls`

[davedx]

We do this for our database connections in Azure Data Studio / the Windows version of it. Really great idea.

[leni536]

I usually use echo for the same purpose.