CLI

Most terminal setups begin as a few helpful aliases and end up scattered across a shell profile, a terminal-emulator menu, a font download, and a handful of plugins cloned years ago. That works until you set up a new machine, connect over SSH, or need to find out why a terminal takes three seconds to open. The answer is not a single perfect terminal or shell. A maintainable command-line workspace is a set of small, replaceable layers with clear ownership. You should be able to change your shell without losing your SSH configuration, replace a terminal emulator without rewriting aliases, and bootstrap a new machine without copying your entire home directory. ...

Bash scripting, a cornerstone of Unix and Linux system administration, offers powerful tools to automate repetitive tasks, streamline workflows, and handle complex operations. For those already comfortable with basic scripting, diving into advanced techniques can unlock new levels of efficiency and capability. This post will explore advanced shell scripting techniques in Bash, focusing on script optimization, robust error handling, and automating complex system administration tasks. Script Optimization Optimization is crucial for ensuring that your scripts run efficiently, especially when dealing with large datasets or intensive tasks. Here are some key techniques to optimize your Bash scripts. ...

TL;DR Generate a modeline with cvt, add it with xrandr --newmode / --addmode, then enable it on your output. Session-only changes vanish on reboot and never fix the login screen. On KDE/Kubuntu with SDDM, put the same commands in Xsetup so they run before the greeter. After I switched from GNOME/Unity to KDE, SDDM would not pick up my ultrawide panel. It stuck at Full HD instead of 2560×1080. I had hit the same class of problem earlier on Ubuntu with an older monitor whose native mode never showed up in the display settings. ...