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How To Find And Remove Unused Packages In Linux

Running out of low disk space? You may need to check for unused packages (orphaned packages) filled in your hard drive. Orphaned (unused) packages are nothing but the packages which will be installed as dependencies/libraries when you install a software in your Linux system. As you know already, whenever we install an application, some other packages (dependencies) will also be installed along with the application you are installing. These dependencies might exist in your hard drive even after you removed the application. After a particular period of time, your hard drive will be flooded with unused or orphaned packages, and you might end up with low disk space. Low disk space not only affects the system performance, it will also not let you to install new applications due to low disk space. So, it is very recommended to wipe out the orphaned packages at regular interval.

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How To Force Users To Use Strong Passwords In Debian, Ubuntu

A strong password must be comprised of at least 14 characters, including at least one special character, one numerical character, one uppercase and lower case letter. More importantly, passwords shouldn’t be easily predictable and shouldn’t be based on dictionary words. Some non-techie people however will not understand or don’t care about the security. They will keep using easily predictable passwords like pass123, welcome123, Welcome@1 etc., that can be easily broken in few attempts. Also, they won’t change the passwords for ages. As a System administrator, it is your job to enforce a strong password policy in order to protect your systems from dictionary-based and brute-force attacks. This brief tutorial will walk you through how to force users to use strong passwords in DEB based distributions like Debian, Ubuntu, Linux Mint etc., using Pluggable Authentication Modules (PAM).

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Install Updates And Security Patches Automatically In Ubuntu

One of the important task of every system administrator is to update packages and apply security patches regularly.  Sometimes, it is much better if you allow your Ubuntu system to do this job itself. Today, We will be discussing an important topic – how to install updates and security patches automatically in Ubuntu. The unattended-upgrades package allows us to automatically install updated packages and security patches whenever they become available. We can either configure the system to update all packages or just install the security updates. This can be very useful when managing headless Ubuntu servers. Of course, you can configure this in your desktop too.

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Update Ubuntu 16.04 LTS Linux Kernel Without Rebooting With The Canonical Livepatch Service

Canonical launched the Canonical Livepatch Service recently, an ”authenticated, encrypted, signed stream of livepatch kernel modules for Ubuntu servers, virtual machines and desktops”, applying critical security and vulnerability patches without requiring a reboot.

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