How to: Unlimited Bash/shell history?

Add this to your (Linux) or (MacOS): There you go, unlimited history. Currently I have 27000 entries :) From : If is not set, no truncation is performed. That means is never truncated Also the same seems to apply to , although I couldn't find that documented. Another neat feature I'm going to try is this: If the variable is set, time stamps are written to the history file, marked with the history comment character, so they may be preserved across shell sessions, like the following: Let me know …