Tame Your History: Big, Deduped, Durable, Timestamped

MediumCommand Line Guru15-25 min

The brief

A bare shell is hostile to productivity: it keeps a tiny history, records every duplicate command, OVERWRITES the history file on every exit (so two terminals clobber each other), and stamps nothing with a time. Fix all of it in a drop-in.

Write /root/.bashrc.d/productivity.sh so that, when sourced, the shell has: a large history (HISTSIZE and HISTFILESIZE both at least the value in /root/case/brief.txt), duplicate suppression (HISTCONTROL), append-don't-clobber (shopt -s histappend), and timestamps (HISTTIMEFORMAT). Grading sources your file in a clean shell and inspects the result, so any correct syntax counts — but don't wrap it in an interactive-only guard. See /root/case/brief.txt.

What you'll do

Raise HISTSIZE and HISTFILESIZE to the required floor
Drop duplicate commands with HISTCONTROL
Turn on histappend so shells append instead of overwriting the history file
Add timestamps with HISTTIMEFORMAT

Hands-on lab: you work on a real Linux box in your browser, graded on the machine's actual state.