Linux Commands
Command references for core Linux tools, syntax, examples, and practical one-liners.
How to Use wget in Linux with Examples
Step-by-step wget tutorial covering downloads, resuming, recursive mirroring, authentication, and the most useful options.
timedatectl Command in Linux: Manage Time, Date, and Time Zone
Use timedatectl to check system time, change the time zone, control NTP synchronization, set the clock manually, and inspect RTC settings on Linux.
history Command in Linux: View and Manage Bash History
Use the history command in Linux to view, search, and clean up Bash command history. Covers expansions, HISTSIZE, HISTIGNORE, and security tips.
How to Check CPU Usage in Linux
This guide explains how to check CPU usage in Linux with top, htop, mpstat, vmstat, sar, ps, uptime, and per-core load tools.
traceroute Command in Linux
Trace the path packets take to a host with the traceroute command. Examples for ICMP (-I), TCP (-T), max hops (-m), and no-DNS (-n) modes.
systemctl Command in Linux: Start, Stop, and Manage Services
Manage services on systemd-based Linux distributions with systemctl. This guide explains how to start, stop, restart, enable, and disable services, reload unit files, and inspect service status.
Bash Best Practices: Writing Safer, Cleaner Scripts
Practical Bash best practices for writing safer and more predictable scripts, covering strict mode, quoting, error handling, and everyday patterns.
How to Use the pkill Command in Linux
The pkill command sends signals to Linux processes by name, user, terminal, or full command pattern. Covers safe matching, common options, and examples.
Linux Kill Process: Stop Processes by PID or Name
Stop stuck programs in Linux with kill, killall, pkill, and xkill. Find the PID, send SIGTERM first, and use SIGKILL only when the process refuses to exit.
How to Remove or Delete a Directory in Linux
Remove a directory in Linux with rmdir for empty folders, rm -rf for non-empty ones, or find for bulk deletion. Examples and common errors.
dd Command in Linux: Copy Disks, Partitions, and Files
This guide explains how to use the dd command in Linux to write ISO images, clone disks, back up partitions, wipe drives, and test disk speed.
echo Command in Linux: Print Text and Variables
How to use the echo command in Linux to print text, display variables, interpret escape sequences, and redirect output to a file. Includes colored output and common pitfalls.
How to Install and Use uv: Fast Python Package Manager
uv is a fast Python package and project manager written in Rust. This guide covers installation on Linux, creating projects, adding dependencies, managing virtual environments, and installing Python versions with uv.
sleep Command in Linux: Pause a Bash Script
How to use the sleep command in bash to pause script execution. Examples cover seconds, minutes, sleep infinity, retry loops, countdowns, and background sleeps.
How to Use SFTP Command to Transfer Files
Use the sftp command to connect over SSH, upload and download files, transfer directories, run batch jobs, and troubleshoot common errors.
fdisk Command in Linux: Create Disk Partitions
Use the fdisk command in Linux to list disks, create GPT or MBR partitions, change partition types, format new partitions, and mount them safely.
ps Command in Linux: ps aux and Common Options
Use ps aux and related ps command options in Linux to list running processes, read output columns, sort by CPU or memory, filter by PID or user, and show full command lines.
How to Remove a User in Linux
Remove user accounts in Linux with userdel. This guide explains how to delete a user, remove the home directory, handle logged-in users, clean up cron jobs, and find files left behind.
How to Add a User to a Group in Linux
Add users to Linux groups with usermod, verify group membership, change primary groups, and fix common issues when group changes do not apply.
su Command in Linux: Switch User
The su command in Linux switches users in the current session and runs commands with another user's privileges. Examples, options, and a sudo vs su comparison.
