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Every time I'm trying to install something, it shows me an error "unable to locate package xxx"

$ sudo apt-get install gddrescue
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package gddrescue

sudo apt-get install testdisk
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package testdisk

$ lsb_release -a
Distributor ID: Ubuntu
Description:    Ubuntu 16.04.4 LTS
Release:        16.04
Codename:       xenial

How can I troubleshoot this issue?

Is that normal...? (Thanks for correcting)

sudo apt update
Reading package lists... Done
Building dependency tree
Reading state information... Done
All packages are up to date.
Hin Mat
  • 9

1 Answers1

1

Hint: When you get Unable to Locate Package xxx, goto https://packages.ubuntu.com and search for the package name. You'll find in your case that gddrescue is available under universe. Thus, we need to add it. Try the following:

sudo add-apt-repository universe
sudo apt update
sudo apt install gddrescue
Shubham
  • 275