Linux7 min read
Securing Linux with fail2ban
Setting up fail2ban to protect SSH and web services. Writing custom filters and understanding ban actions.
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Linux7 min read
NFS: sharing files across Linux machines
Setting up NFS shares between Linux servers. Server configuration, client mounting, and performance tuning.
Linux12 min read
iptables essentials: a practical guide to Linux firewalling
A hands-on guide to iptables. Covers chains, tables, rule syntax, and real examples for securing a Linux server.
Linux6 min read
Package management with apt
Installing, removing, and managing software packages on Ubuntu and Debian. Repositories, pins, and common gotchas.
Linux8 min read
Linux networking basics: ip, ss, and troubleshooting
Checking interfaces, routing, and connections with modern Linux networking tools. Replacing ifconfig and netstat.
Linux7 min read
Log management with journalctl and rsyslog
Reading systemd logs with journalctl, configuring rsyslog for remote logging, and managing log rotation.
Linux6 min read
Understanding Linux swap space
What swap is, when Linux uses it, how much you need, and how to configure swap files and partitions.
Linux9 min read
Disk management with LVM
Logical Volume Management: resizing partitions without reboots, adding disks on the fly, and snapshots.
Linux10 min read
Bash scripting for beginners
Writing your first bash scripts. Variables, conditionals, loops, and the patterns you'll actually use on a server.
Linux7 min read
Linux process management: ps, top, and beyond
Finding runaway processes, understanding process states, and managing background jobs.