How to install LXQt Desktop environment
To install LXQt open your terminal and paste these commands one by one.
sudo add-apt-repository ppa:lubuntu-dev/lubuntu-daily
sudo add-apt-repository ppa:gilir/q-project
sudo apt-get update
sudo apt-get install lxqt-metapackage lxqt-panel openbox
that will install LXQt
W: Failed to fetch http://ppa.launchpad.net/gilir/q-project/ubuntu/dists/jessie/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/gilir/q-project/ubuntu/dists/jessie/main/binary-i386/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/lubuntu-dev/lubuntu-daily/ubuntu/dists/jessie/main/binary-amd64/Packages 404 Not Found
W: Failed to fetch http://ppa.launchpad.net/lubuntu-dev/lubuntu-daily/ubuntu/dists/jessie/main/binary-i386/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
s@android:~$ sudo apt-get install lxqt-metapackage lxqt-panel openbox
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package lxqt-metapackage
E: Unable to locate package lxqt-panel
Personal Package Archives (ppa) are especially compiled for Ubuntu and can cause severe trouble on a Debian system.
In your case probably the repo-path is wrong as well. Launchpad uses the name of the Ubuntu version the package is compiled for, so it should read raring, saucy, trusty etc. but never jessie. That's why you get "404 Not Fournd".
Never mind this bug, I just installed Sparkylinux JWM 32-bit. Thanks.