Backing Up Only Recent Files
Getting backups done is important. Sometimes what you have to backup and what you want to backup make quite the contrast. Consider I never want to back up my .mozilla/firefox//cache directory. Let’s cover how to avoid that. Because if you don’t, things get really bunk, little dude.
Before you freak out man, prepare for some regular expressions. More regular than, huh and eh. “Everthing” separated by the gnarly pipe | is a pattern that will be matched by egrep.
IGNORE="$LOGNAME/(\\.mozilla/firefox/aq0d3bz0xy/cache|\\.gvfs|\\.cache|\\.Trash)' cd $HOME/.. find $HOME -type f \ | egrep -v $IGNORE \ > /tmp/backup_list tar cf /mnt/backups/backup.tgz --use-compress-program lbzip2 -T /tmp/backup_list
That will backup your whole home directory except anything you slap into IGNORE. If that includes a whole git tree or two, well, you might be waiting for a long time.
Therefore, let’s concentrate on things that just changed since the last backup.
cd $HOME/.. if [ ! -f $HOME/.recent ]; then find $HOME -type f \ | egrep -v $IGNORE \ > /tmp/backup_list else find $HOME -type f \ -newer $HOME/.recent \ | egrep -v $IGNORE \ > /tmp/backup_list fi touch $HOME/.recent tar cf /mnt/backups/backup.tgz --use-compress-program lbzip2 -T /tmp/backup_list
Now we have a way to backup only recent things. Using all our cores, courtesy of lbzip2.