ls becomes slow in very large directories because it sorts names and formats columns before printing. Disabling both yields immediate streaming output.

Run a command at regular intervals and watch its output update, useful for monitoring changing files or other live system state with watch.

Use git difftool to open diffs in a graphical viewer like Meld when the terminal diff is not enough.

Browser-based OCR for scanned documents and images, with Web Worker processing and support for many input sources. Accuracy drops on distorted pages, mixed content, and layouts with tight borders.

VCR request replay depends on matching new HTTP requests to recorded ones; :match_requests_on lets you customize matching by URI, path, or a custom lambda.

git diff can show more surrounding lines for each change, making it easier to understand context in modified files.

VCR tests can flicker when recorded requests change because of randomness, timestamps, or generated sequences, making cassette mismatches hard to diagnose.

The MATE panel clock can use a custom strftime format instead of the default display, making compact date-and-time layouts possible.

SVGs can be styled with CSS only when embedded inline; using them as images or sprites blocks styling, and IE support is limited.

reverse_order breaks on complex SQL sorting and can generate invalid queries in Rails 4; Rails 5 raises ActiveRecord::IrreversibleOrderError instead.

Address-bar suggestions can outrank bookmarks and recent sites in Chrome; SHIFT + DEL removes unwanted entries, and a custom history search restores easier access to recent pages.

Quick reference for commonly used AngularJS features, useful when you need syntax and concepts at a glance.

Generate a one-time AWStats report from a single web log file by using a minimal config and disabling DNS lookups for faster output.

Malformed commit timestamps can make git clone fail with badTimezone when strict object validation is enabled. Disabling fetch.fsckobjects works around the error.

Free stock photos for personal and commercial use without attribution, with permission to modify images.

Activated gems can be checked through Gem.loaded_specs, and required libraries can be detected with defined? on a constant they define.

F12 on Ubuntu MATE can be reclaimed by stopping Tilda or disabling its autostart, preventing the drop-down terminal from intercepting the shortcut.

A library for testing a Ruby gem against multiple Ruby, dependency and database combinations, with shared local and CI setup for full permutation coverage.

mysql2 can fail to load libmysqlclient.so.20 after a broken install; reinstalling the gem usually restores the missing client library link.

Convert an RGBA color into the RGB equivalent for a chosen background when transparency must be removed. A Sass rgba-to-rgb() helper can compute the blend automatically.

VCR records each request only once, so replaying repeated identical calls can fail unless allow_playback_repeats is enabled.

localhost can resolve to ::1 on newer Linux systems, which may affect firewall rules that assume 127.0.0.1.

Gamma correction affects how colors are encoded and displayed, and sRGB defines a standard color space used by many systems.