I had a cronjob which was archiving my bash history file, but after one of my Fedora upgrades, it stopped working and I lost my .bash_history. Now, that’s unfortunate!
To prevent this in the future, I have decided to take different approach. I have a script now which I run from my bash profile. It creates backups every month (leaving last 200 commands there so I will not lost the latest commands). Since I have this in my profile, it will work forever.
The script is lightweight and basically it only adds one extra check - if backup is older than latest bash history file, copy it over. So this should not slow down my bash startup at all (basically one cp command a day when I start my laptop or when I append a history in a terminal).
Here it is:
#!/bin/sh # This script creates monthly backups of the bash history file. Make sure you have # HISTSIZE set to large number (more than number of commands you can type in every # month). It keeps last 200 commands when it "rotates" history file every month. # Typical usage in a bash profile: # # HISTSIZE=90000 # source ~/bin/history-backup # # And to search whole history use: # grep xyz -h --color ~/.bash_history.* # KEEP=200 BASH_HIST=~/.bash_history BACKUP=$BASH_HIST.$(date +%y%m) if [ -s "$BASH_HIST" -a "$BASH_HIST" -nt "$BACKUP" ]; then # history file is newer then backup if [[ -f $BACKUP ]]; then # there is already a backup cp -f $BASH_HIST $BACKUP else # create new backup, leave last few commands and reinitialize mv -f $BASH_HIST $BACKUP tail -n$KEEP $BACKUP > $BASH_HIST history -r fi fi