TOPIC / CATEGORY
Linux & Systems · Page 2
17 articles
SSH Config Aliases for a Small Fleet
Replace long SSH commands with readable host aliases while keeping usernames, ports, keys, and jump hosts explicit.
Disabling IPv6 on a Linux Server, and When Not To
Decide whether disabling IPv6 actually solves your problem, then do it with a sysctl drop-in or the ipv6.disable=1 kernel parameter on Debian, Ubuntu, Rocky Linux, or AlmaLinux, verify the result, and roll it back.
The First Hour on a Fresh Debian or Ubuntu VPS
Set up a sudo user, SSH keys, an sshd drop-in that blocks password and root logins, a ufw firewall, and automatic security updates on a new Debian or Ubuntu server, checking each step as you go.
A Gentle First Pass With journalctl
Start with a narrow journalctl query and widen it deliberately instead of scrolling through the entire system journal.
journalctl Time Ranges That Save Time
Reduce a large systemd journal to the service, boot, time window, and priority that matter to an incident.
Read Disk Usage Before Deleting Anything
A read-only first pass for understanding a full Linux filesystem before cleanup begins.
tmux for a Quietly Persistent Shell
Keep a long command running when your SSH connection drops, with three tmux commands and a couple of useful extras.