lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/john/gvfs
      Output information may be incomplete.
john@john-Ubuntu:~$ sudo dpkg --configure -a
john@john-Ubuntu:~$ sudo apt-get purge ttf-mscorefonts-installersudo apt-get install ttf-mscorefonts-installer
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package ttf-mscorefonts-installersudo
E: Unable to locate package apt-get
E: Unable to locate package install
john@john-Ubuntu:~$