sudo and visudo: Configuring sudoers Safely (Complete Guide)
Configure Linux sudo access safely with visudo: grant full or limited privileges, use NOPASSWD for automation, organize with…
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Fail2ban Ban Report Shell Script for Linux (Daily Summary)
Generate a daily Fail2ban ban report on Linux. List banned IPs per jail, top attackers, and email summary…
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Harden OpenSSH on Linux Servers (Secure sshd_config)
Harden OpenSSH on Linux: disable root login, use key-only auth, change port, and limit users with sshd_config.
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Linux System Update Checker Shell Script with Email Notification
Check for available Linux system updates with a Bash script. Email notification for pending security patches.
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Install and Configure Fail2ban on Linux (SSH Protection)
Protect your Linux server from brute-force attacks with Fail2ban. Block malicious IPs automatically.
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SSH Key Authentication on Linux Servers (Step-by-Step)
Set up SSH key authentication on Linux for secure, passwordless server login.
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Proxmox Firewall Configuration for VMs and Host
Configure Proxmox firewall rules for datacenter, node, and VM level. Secure your Proxmox host and virtual machines.
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