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When removing unused kernals (to make space on /boot) I get this message: 

The following packages were automatically installed and are no longer required:
  gnome-mplayer hardinfo libgda-5.0-4 libgda-5.0-common libgmlib1 libgmtk1
  libgmtk1-data libmusicbrainz3-6 libwxsqlite3-3.0-0 linux-headers-3.19.0-30
  linux-headers-3.19.0-30-generic lubuntu-default-session
  lubuntu-software-center lxappearance-obconf lxsession-default-apps mtpaint
  python-gudev python-pysqlite2 sylpheed-plugins transmission xpad
Use 'apt-get autoremove' to remove them.
0 to upgrade, 0 to newly install, 0 to remove and 47 not to upgrade.

I don't understand the last line, and when I use the autoremove command as suggested I get:

E: Could not open lock file /var/lib/dpkg/lock - open (13: Permission denied)
E: Unable to lock the administration directory (/var/lib/dpkg/), are you root?

What do I do?

steeldriver
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David Ashton
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    Did you run the command as sudo apt-get autoremove? The could not open lock file is usually because of no sudo in front of the command so it is ran as a root user. – Terrance Dec 29 '15 at 22:53

1 Answers1

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apt-get on Ubuntu always requires sudo.

You should copy paste this command into the terminal:

sudo apt-get autoremove

Mario Kamenjak
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