i am also facing same problem plz check this iam getting on terminal
root@kali:~# sudo apt-get install gdebi-core
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package gdebi-core is not available, but is referred to by another package.
This may
** Also affects: sessioninstaller
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1059600
Title:
Local deb package cannot be installed by double clicking
