Gfilui

I removed snapd from my computer by following the instructions at https://ubuntuforums.org/showthread.php?t=2328152:

sudo apt purge snapd ubuntu-core-launcher squashfs-tools

However, my system is still full of files and directories that are related (I think) to the snapd package, as you can see from the result of locate snapd.

I have 2 questions:

1. Why didn't apt purge get rid of all these files?


2. 
   

   Is it safe to remove them, or are some of these being used by the system or by some other package? If so, how can I find out?

   
   
   

   /etc/apparmor.d/snap.core.3887.usr.lib.snapd.snap-confine
/etc/apparmor.d/usr.lib.snapd.snap-confine.real
/etc/apparmor.d/cache/snap.core.3887.usr.lib.snapd.snap-confine
/etc/apparmor.d/cache/usr.lib.snapd.snap-confine.real
/etc/apparmor.d/local/usr.lib.snapd.snap-confine.real
/etc/systemd/system/multi-user.target.wants/snapd.autoimport.service
/etc/systemd/system/multi-user.target.wants/snapd.core-fixup.service
/etc/systemd/system/multi-user.target.wants/snapd.service
/etc/systemd/system/sockets.target.wants/snapd.socket
/etc/systemd/system/timers.target.wants/snapd.refresh.timer
/etc/systemd/system/timers.target.wants/snapd.snap-repair.timer
/lib/systemd/system/snapd.autoimport.service
/lib/systemd/system/snapd.core-fixup.service
/lib/systemd/system/snapd.refresh.service
/lib/systemd/system/snapd.refresh.timer
/lib/systemd/system/snapd.service /lib/systemd/system/snapd.snap-repair.service /lib/systemd/system/snapd.snap-repair.timer
/lib/systemd/system/snapd.socket /lib/systemd/system/snapd.system-shutdown.service /lib/udev/rules.d/66-snapd-autoimport.rules
/usr/lib/snapd /usr/lib/snapd-glib
/usr/lib/snapd-glib/snapd-login-service
/usr/lib/x86_64-linux-gnu/libsnapd-glib.so.1
/usr/lib/x86_64-linux-gnu/libsnapd-glib.so.1.0.0
/usr/share/doc/libsnapd-glib1
/usr/share/doc/snapd
/usr/share/doc/snapd-login-service
/usr/share/doc/libsnapd-glib1/changelog.Debian.gz
/usr/share/doc/libsnapd-glib1/copyright
/usr/share/doc/snapd-login-service/changelog.Debian.gz
/usr/share/doc/snapd-login-service/copyright
/usr/share/polkit-1/actions/io.snapcraft.snapd.policy
/var/cache/snapd /var/cache/apt/archives/snapd_2.29.4.2_amd64.deb
/var/lib/snapd
/var/lib/dpkg/info/libsnapd-glib1:amd64.list
/var/lib/dpkg/info/libsnapd-glib1:amd64.md5sums
/var/lib/dpkg/info/libsnapd-glib1:amd64.shlibs
/var/lib/dpkg/info/libsnapd-glib1:amd64.symbols
/var/lib/dpkg/info/libsnapd-glib1:amd64.triggers
/var/lib/dpkg/info/snapd-login-service.conffiles
/var/lib/dpkg/info/snapd-login-service.list
/var/lib/dpkg/info/snapd-login-service.md5sums
/var/lib/dpkg/info/snapd.conffiles
/var/lib/dpkg/info/snapd.list
/var/lib/dpkg/info/snapd.md5sums
/var/lib/dpkg/info/snapd.postinst
/var/lib/dpkg/info/snapd.postrm
/var/lib/dpkg/info/snapd.preinst
/var/lib/dpkg/info/snapd.prerm
/var/lib/systemd/deb-systemd-helper-enabled/snapd.autoimport.service.dsh-also
/var/lib/systemd/deb-systemd-helper-enabled/snapd.core-fixup.service.dsh-also
/var/lib/systemd/deb-systemd-helper-enabled/snapd.refresh.timer.dsh-also
/var/lib/systemd/deb-systemd-helper-enabled/snapd.service.dsh-also
/var/lib/systemd/deb-systemd-helper-enabled/snapd.snap-repair.timer.dsh-also
/var/lib/systemd/deb-systemd-helper-enabled/snapd.socket.dsh-also
/var/lib/systemd/deb-systemd-helper-enabled/snapd.system-shutdown.service.dsh-also
/var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/snapd.autoimport.service
/var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/snapd.core-fixup.service
/var/lib/systemd/deb-systemd-helper-enabled/multi-user.target.wants/snapd.service
/var/lib/systemd/deb-systemd-helper-enabled/sockets.target.wants/snapd.socket
/var/lib/systemd/deb-systemd-helper-enabled/timers.target.wants/snapd.refresh.timer
/var/lib/systemd/deb-systemd-helper-enabled/timers.target.wants/snapd.snap-repair.timer
/var/lib/systemd/timers/stamp-snapd.refresh.timer

   
   

The packaging system (dpkg) does not remove dfiles created outside of the packaging system, generally. Most of the files you're referencing here were generated when installing snaps on your system. However, it appears you do still have the snapd package installed, along with libsnapd-glib1 and snapd-login-service.

Try sudo apt-get autoremove --purge libsnapd-glib1 snapd to remove them.