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Introduction
Rocky Linux 10, based on CentOS Stream and Red Hat Enterprise Linux (RHEL) 10, is now available, offering enterprises a stable, open-source alternative with full RHEL compatibility. This release strengthens security, performance, and system administration capabilities, making it ideal for cybersecurity professionals, sysadmins, and DevOps teams.
Learning Objectives
- Understand Rocky Linux 10’s key security and compatibility features.
- Learn essential Linux commands for system hardening and vulnerability management.
- Explore best practices for securing Rocky Linux in enterprise environments.
You Should Know
1. Updating and Securing Rocky Linux 10
Command:
sudo dnf update --security
Step-by-Step Guide:
This command fetches and installs only security-related updates, reducing exposure to vulnerabilities.
1. Open a terminal.
- Run `sudo dnf update –security` to apply critical patches.
- Reboot if kernel updates are installed (
sudo reboot).
2. Enabling Firewalld for Network Security
Command:
sudo systemctl enable --now firewalld
Step-by-Step Guide:
Firewalld provides dynamic firewall management.
- Enable and start Firewalld with the command above.
2. Check status: `sudo firewall-cmd –state`.
3. Allow SSH: `sudo firewall-cmd –add-service=ssh –permanent`.
3. Hardening SSH Access
Command:
sudo nano /etc/ssh/sshd_config
Step-by-Step Guide:
Edit the SSH config file to disable root login and enforce key-based authentication:
1. Open `/etc/ssh/sshd_config`.
2. Set `PermitRootLogin no` and `PasswordAuthentication no`.
3. Restart SSH: `sudo systemctl restart sshd`.
4. Auditing System Logs with journalctl
Command:
journalctl -xe
Step-by-Step Guide:
Monitor system logs for security events:
1. Run `journalctl -xe` to view recent logs.
2. Filter by priority: `journalctl -p err`.
3. Track failed logins: `journalctl _SYSTEMD_UNIT=sshd.service`.
5. Detecting Vulnerabilities with OpenSCAP
Command:
sudo dnf install openscap-scanner scap-security-guide
Step-by-Step Guide:
1. Install OpenSCAP for compliance scanning.
2. Scan the system:
sudo oscap xccdf eval --profile stig --results scan.xml /usr/share/xml/scap/ssg/content/ssg-rl10-ds.xml
3. Review `scan.xml` for security gaps.
6. Securing Kernel Parameters with sysctl
Command:
sudo nano /etc/sysctl.conf
Step-by-Step Guide:
Add these lines to prevent common attacks:
net.ipv4.conf.all.rp_filter=1 kernel.exec-shield=1 net.ipv4.icmp_echo_ignore_broadcasts=1
Apply changes: `sudo sysctl -p`.
7. Automating Security Updates with cron
Command:
sudo crontab -e
Step-by-Step Guide:
Schedule weekly security updates:
1. Add this line to crontab:
0 3 0 sudo dnf update --security -y
2. Save and exit (`Ctrl+X`, `Y`).
What Undercode Say
- Key Takeaway 1: Rocky Linux 10 is a robust, security-focused RHEL alternative, ideal for enterprises needing long-term stability.
- Key Takeaway 2: Proactive system hardening (firewalls, SSH, OpenSCAP) is critical to mitigating cyber threats.
Analysis:
With Rocky Linux 10, organizations gain a secure, community-driven OS that aligns with RHEL’s enterprise standards. Its compatibility with security tools like OpenSCAP and Firewalld makes it a strong choice for compliance-heavy industries. As cyber threats evolve, adopting automated patching and strict access controls will be essential for maintaining a hardened Linux environment.
Prediction
Rocky Linux will continue gaining traction as CentOS alternatives grow in demand. Future updates may integrate AI-driven security analytics, further enhancing threat detection and compliance automation for enterprises.
IT/Security Reporter URL:
Reported By: Activity 7338984544827596800 – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅
