Disable Guest Session in Ubuntu 15.10

Ubuntu 15.10 is using lightdm desktop manager. man lightdm says that it is using /etc/lightdm/lightdm.conf for configuration. Ubuntu 15.10 does not include such a file. To disable the guest session create the file (/etc/lightdm/lightdm.conf) with following content:


Menu with icons in Fedora 22/23

To enable menu icons in gnome-shell this command does the trick:

Tested under Fedora 22 and 23.

docker as normal user under Fedora 23

See https://docs.docker.com/v1.6/installation/fedora/

“The docker command line tool contacts the docker daemon process via a socket file /var/run/docker.sock owned by root:root. Though it’s recommended to use sudo for docker commands, if users wish to avoid it, an administrator can create a docker group, have it own /var/run/docker.sock, and add users to this group.”

Don’t forget to relogin to make this change take effect.

Install nvidia GTX980 driver in Fedora 23/22/21

I found a good and working tutorial unter http://www.if-not-true-then-false.com/2015/fedora-nvidia-guide/.

Here my notes for Fedora 23 and my GTX980:


Install Docker in Ubuntu 12.04 Precise

First make sure you have the latest version and an actual kernel running. Execute theses commands as root:

Then install docker with the following lines as root:

After this docker should be up and running. Rry using “docker ps” as root or with sudo.

docker on Linux Mint 17.2 Rafaela

There seem to be some missing dependencies in docker.io package. Here are the steps to get docker running in Linux Mint 17.2:

If you want to use docker as simple user you have to add this user to the docker group. Don’t forget to relogin if you add your actual user to a new group.

Disable guest account in ubuntu 14.10

To disable the guest account simply change the file /usr/share/lightdm/lightdm.conf.d/50-guest-wrapper.conf and add the last line:

Don’t forget that you have to restart lightdm before changes take effect.

gpg behind proxy results in gpgkeys: HTTP fetch error 7: couldn’t connect to host

To get something like

work behind a proxy I had to add http_proxy and https_proxy into my /etc/environment file. Don’t forget to source the file or to relogin after changes in it. With theses entries I had to use

telling sudo to preserve existing env variables. Now it’s working for me.

Till now I didn’t get apt-key add or gpg alone to import a key from web behind a proxy. I downloaded the keys manually and imported them. So let me know if you know how to do it.