How to Secure Your Linux System Linux is generally considered one of the safest operating systems available, yet it is not immune. Cyber threats are constantly evolving, and securing your given Linux system requires a proactive approach to security. Whether using Linux on desktop or development machine, or as a server, an expert can provide thoughtful approaches to securing your Linux system.
1. Perform Regular Updates Regular updates ensure vulnerabilities are patched the moment they are discovered. Use the following commands to perform updates on your machine: o apt update && sudo apt upgrade -y # For Debian-based distrossudo dnf update -y
For Fedora-based distrossudo zypper update # For open SUSEIf possible, enable automatic updates: sudo systemctl enable –now unattended-upgrades
2. Manage User Accounts & Permissions Limit access to only the necessary users, while assuring that each user has appropriate permissions permitted to perform their duties as assigned. Disable root account (use sudo instead)Limit sudo access using /etc/sudoers Utilize the below command to delete any unnecessary user account:sudo userdel -r username Make sure all required users utilize strong passwords and have password policies in place: libpam-pwquality will assist with this. Install with the command:sudo apt install libpam-pwquality
3. Install a Firewall A firewall regulates incoming and outbound traffic. This reduces your exposure to threats available on the internet. Use UFW (uncomplicated firewall) and issue the command.sudo