sujith@sujith:~$ sudo apt-get install gdebi [sudo] password for sujith: Reading package lists... Done Building dependency tree Reading state information... Done E: Unable to locate package gdebi
2

1 Answer

Ubuntu 17.04 has reached end of life, as you can see here: . This means it receives no further maintenance updates, including critical security upgrades. You should upgrade to a newer Ubuntu version (preferably wait for Ubuntu 18.04 LTS to be released - it's on April 26th).