So in another case of tab completion gone wrong I ended up staring at the following on my laptop.
johnf@zoot:~/dev/vquence/metrics/trunk$ sudo rm -rf /usr/lib ^C
The command only ran for a few seconds so the damage wasn’t to bad, but what did I lose?
The locate command came to my rescue. locate runs out of cron, usually once a day, and creates a database with a list of every file on your machine. You can then use it to search for files. So to work out what was missing I did the following.
# Get the list of files before we removed them
locate --regexp '.' > /tmp/before_rm
# update the locate database
sudo updatedb
# Get the list of current files on the system
locate --regexp '.' > /tmp/after_rm
# Create a list of what's missing
diff -u /tmp/before_rm /tmp/after_rm > /tmp/diff_rm
grep '^-' /tmp/diff_rm | sed -e 's/^-//' > /tmp/missing_rm
# Ask the dpkg system what packages those files belong to
for i in `cat /tmp/missing_rm`
do
dpkg -S $i;
done | awk '{print $1}' | sed -e 's/:$//;s/,//g' > /tmp/packages
# Reinstall those packages
sudo aptitude reinstall `cat /tmp/packages`
After this process it is probably worth running the step from updatedb again to work out what is still missing.
For the record I lost 102 files and had to reinstall 97 packages.
Now back to real work!