Keep your system and software up to date with the latest security patches. Use package managers like ‘apt’ (Debian/Ubuntu) or ‘yum’ (RHEL/CentOS) to update your system.
Enforce the use of strong passwords for all user accounts, especially for the root user. Consider using tools like ’passwd‘ to set complex passwords.
Instead of relying solely on passwords, use SSH keys for authentication. This adds an extra layer of security to your server.
Conduct periodic security audits to identify and fix vulnerabilities. Tools like Lynis or OpenVAS can automate this process.
Regularly review system logs (‘-/var/log’) for any suspicious activities. Tools like ‘logwatch’ can help summarize log data.
Schedule regular backups of critical data. This ensures that you can quickly recover from a security incident or hardware failure.