Here’s how to quickly search for a package from terminal in Linux Mint / Ubuntu:
1. If not already installed, install aptitude by issuing the following command at the terminal –
sudo apt-get install aptitude
2. Now, issue the following command at the terminal –
sudo aptitude search <full or partial name of the package you want to search>
For example, to search for a package named ‘wicd’, we issued the following command at the terminal –
sudo aptitude search wicd
3. As you can see in the screenshot, we found our package and also a short description of what that package does. Now, to install a package use the following command at the terminal –
sudo apt-get install <package name>
In our case, it would be –
sudo apt-get install wicd