user@linux:~$ head -2 /etc/os-release NAME="Ubuntu" VERSION="18.10 (Cosmic Cuttlefish)" user@linux:~$
The default theme in Lubuntu has light themes (Bright and White), though I prefer a dark theme (With greyish and blackish background, and white text) as that kind of theme is good for my eyes (strains less!!).
Therefore, I followed this link https://www.deviantart.com/satya164/art/elementary-Dark-GTK3-Theme-244257862 and tried to install it.
user@linux:~$ sudo add-apt-repository ppa:satyajit-happy/themes This PPA contains various themes for Gnome and Xfce. More info: https://launchpad.net/~satyajit-happy/+archive/ubuntu/themes Press [ENTER] to continue or Ctrl-c to cancel adding it. Ign:1 http://ppa.launchpad.net/satyajit-happy/themes/ubuntu cosmic InRelease Hit:2 http://archive.ubuntu.com/ubuntu cosmic InRelease Get:3 http://archive.ubuntu.com/ubuntu cosmic-updates InRelease [88.7 kB] Get:4 http://security.ubuntu.com/ubuntu cosmic-security InRelease [88.7 kB] Err:5 http://ppa.launchpad.net/satyajit-happy/themes/ubuntu cosmic Release 404 Not Found [IP: 18.104.22.168 80] Get:6 http://archive.ubuntu.com/ubuntu cosmic-backports InRelease [74.6 kB] Reading package lists... Done E: The repository 'http://ppa.launchpad.net/satyajit-happy/themes/ubuntu cosmic Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details. user@linux:~$ user@linux:~$ sudo apt-get install elementary-dark-theme Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package elementary-dark-theme user@linux:~$
However, I'm getting the error says that it "Unable to locate package elementary-dark-theme"
I've also tried Changing the background color of the File-Manager but didn't work too.
I would like to get black background and white/bright text on every application including File Manager. Please let me know how to accomplish this.