$ apt-get –purge munin
E: Invalid operation munin
$ dpkg –purge munin
(Reading database … 36418 files and directories currently installed.)
Removing munin …
Purging configuration files for munin …
The generated web site or accumulated data won’t be removed.
Processing triggers for man-db …
$ dpkg –purge munin-node
(Reading database … 36374 files and directories currently installed.)
Removing munin-node …
Stopping Munin-Node: done.
Purging configuration files for munin-node …
dpkg - warning: while removing munin-node, directory `/var/lib/munin’ not empty so not removed.
Processing triggers for man-db …
然后再根据信息提示删除相应的文件夹：$ rm -r /var/lib/munin