# Ensure history is written after every command, allowing it to persist across sessions
shopt -s histappend # Append to history instead of overwriting
PROMPT_COMMAND="history -a; history -c; history -r; $PROMPT_COMMAND"
# Set the history size (adjust as needed)
HISTSIZE=50000 # Number of commands kept in memory
HISTFILESIZE=1000000 # Number of commands kept in the history file
# Add timestamps to history (format: YYYY-MM-DD HH:MM:SS)
HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S "
# Ignore duplicate and space-prefixed commands
HISTCONTROL=ignoredups:ignorespace
# Save multi-line commands as a single entry
shopt -s cmdhist
# Allow history expansion with Ctrl + R
bind '"\e[A":history-search-backward'
bind '"\e[B":history-search-forward'
Also, if you are on shells you worry about, use gnu screen (or tmux if you prefer) imho. It will give you a second layer of history to be able to dig through.
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