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git log Command: View Commit History
Browse commit history with git log: show the last commit, filter by author, date, or keyword, search by code change, track a file across renames, and read branch graphs.
whoami Command in Linux: Display the Current User Name
The whoami command shows the current effective username on Linux. This guide explains syntax, practical examples, shell script usage, and how it compares to id -un and $USER.
killall Command in Linux: Kill Processes by Name
Use the Linux killall command to stop processes by name, select signals, filter by user or age, confirm matches, and compare killall with kill and pkill.
apt Command in Linux
The apt command manages packages on Ubuntu, Debian, and related distributions. This guide covers the essential commands for installing, upgrading, removing, and searching packages.
How to Create Symlinks in Linux with ln
The ln command creates symbolic links on Linux, giving you a stable name that points to a moving target. This guide covers creating, updating, and cleaning up symlinks, plus the -sfn pattern used for atomic deploys.
aws s3 Commands: cp, sync, ls, and rm Examples
Practical aws s3 command examples for listing buckets, copying files, syncing directories, filtering transfers, and deleting objects safely from Linux.
cat Command in Linux: View, Combine, and Create Files
Display, combine, and create files with the cat command in Linux, plus line numbers, hidden characters, and when to use less instead.
Python venv: How to Create and Use Virtual Environments
Python's venv module creates isolated environments so each project can pin its own package versions. This guide covers python -m venv, activating and deactivating, managing dependencies with requirements.txt, and when to reach for virtualenv, uv, or pipx instead.
How to Install and Configure the AWS CLI on Linux
Install AWS CLI version 2 on Linux, authenticate with aws login or IAM Identity Center, manage profiles, and verify access to your AWS account.
How to Set or Change Timezone on Ubuntu Server and Desktop
Check the current time zone on Ubuntu and change it permanently with timedatectl, or switch it from the Date & Time panel on Ubuntu Desktop.
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Cheatsheets
AWS CLI Cheatsheet
Quick reference for AWS CLI commands, profiles, and output filtering
mount Cheatsheet
Quick reference for the mount command: mount and unmount filesystems, mount options, UUID and label mounts, network shares, and /etc/fstab entries
head Cheatsheet
Quick reference for showing the first lines or bytes of files and limiting command output with head in Linux
sha256sum Cheatsheet
Quick reference for generating and verifying SHA-256 and MD5 checksums with sha256sum, md5sum, and related Linux hash commands