Posts
Linux Basics: Reading and Searching Text Files
You can inspect a text file on Debian or Ubuntu without opening an editor. Start with a small practice file, then use the same commands on larger files. Create sample text Run …
October 4, 2026
Linux Basics: Moving Around the Terminal
Open a terminal on Debian or Ubuntu. Each command runs in a working directory, which is simply the folder you are currently in. Start by finding it. Check your location pwd ls ls …
October 4, 2026
Linux Basics: Managing Packages with apt
Debian and Ubuntu use apt to find and manage software packages. Start by checking a package’s details before installing it. Use a disposable Debian or Ubuntu VM for practice. …
October 4, 2026
Linux Basics: Creating, Copying, and Removing Files
These commands work on Debian and Ubuntu. Practice in a new temporary directory so the examples do not affect your existing files. Create a workspace mktemp -d The command prints a …
October 4, 2026
Linux Basics: Checking Services and Logs
On Debian and Ubuntu systems running systemd, systemctl shows service status and journalctl reads system logs. These checks are a useful starting point when a background service is …
October 4, 2026
Stop Re-uploading Unchanged Hugo Files to S3 with a SHA-256 Manifest
A clean Hugo build can produce unchanged files with new modification times. S3 sync may upload them again because it compares size and timestamps rather than file contents. A …
September 30, 2026
Running Proxmox VXLAN SDN over WireGuard with OPNsense NAT
This is a setup for three Proxmox VE hosts where isolated guest networks span the cluster, inter-node tenant traffic is encrypted, and one OPNsense VM acts as the edge gateway for …
May 3, 2026
Installing Docker Engine (docker-ce) on Ubuntu
Note This post may be partially machine- or AI-translated. If there is any discrepancy, the Korean version takes precedence. Install docker-ce on Ubuntu 22.04.4 LTS. Uninstall old …
July 13, 2024
Editing the hosts file on macOS
Note This post may be partially machine- or AI-translated. If there is any discrepancy, the Korean version takes precedence. Note
July 23, 2021
Disabling HSTS for a specific domain in Chrome
Note This post may be partially machine- or AI-translated. If there is any discrepancy, the Korean version takes precedence. Note
July 21, 2021