Linux & Sysadmin
Red Hat, systemd, networking, storage, performance, firewalls and shell scripting.
Linux & Sysadmin articles
Linux & Sysadmin· 4 min read
auditd Basics
auditd records who did what at the syscall level — file access, config changes, privilege use. Here's how to write useful rules without drowning the disk.
September 16, 2026Linux & Sysadmin· 3 min read
SSH Server Hardening
The sshd_config settings that matter, in priority order — key-only auth first — plus how to apply them without locking yourself out of the box.
September 16, 2026Linux & Sysadmin· 3 min read
Finding What Is Using a Port on Linux
The three commands that answer 'address already in use', including the container and namespace cases that trip people up.
September 16, 2026