1. Regular Backups:

   • Use tools like rsync, tar, or timeshift.

2. Encrypt Sensitive Data:

   • Use gpg to encrypt files:

     gpg -c file.txt

3. Verify Backups:

   • Regularly test your backup files to ensure they are functional.

Summary

In this lesson, you learned about Linux security fundamentals, including SSH hardening, firewall management, monitoring, and backups. Implementing these practices will enhance the security of your Linux systems. In the next lesson, we will focus on Linux performance tuning and optimization.