Q:

How to install sni-qt in Ubuntu 19.10?

The package sni-qt (https://packages.ubuntu.com/disco/sni-qt) got removed from Ubuntu 19.10 repositories (I need it as a dependency to install some other software).
Why did it get removed? Is there any dependency issues?
How to install it in Ubuntu 19.10?

A:

If you look at the link you posted (https://packages.ubuntu.com/disco/sni-qt), it relied on Qt4 which is EOL & no longer supported.
The software either needed to be ported to Qt5 or removed as it cannot run in later releases.

libqt4-dbus (>= 4:4.6.1)
       Qt 4 D-Bus module
libqtcore4 (>= 4:4.7.3-1ubuntu3~)
       Qt 4 core module
libqtgui4 (>= 4:4.8.7)
       Qt 4 GUI module

fyi: Qt 5.0 came out back in 2012

