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Browse all Linuxize tutorials, guides, and references.
CPU Info on Linux: Check CPU Details from the Command Line
Two commands give you everything about your CPU on Linux: /proc/cpuinfo for raw per-core details, and lscpu for a readable summary. See how to use both.
tr Command in Linux: Translate, Delete, and Squeeze Characters
The tr command translates, deletes, and squeezes characters from standard input. This guide covers tr syntax, character sets and ranges, case conversion, removing line endings, and practical pipeline examples.
Understanding the /etc/fstab File in Linux
The /etc/fstab file defines how filesystems and storage devices are mounted at boot. This guide explains the fstab format, field meanings, mount options, and how to add new entries safely.
How to Create Bash Aliases
Bash aliases let you shorten long commands into short, memorable shortcuts. This guide covers alias syntax, persistent aliases in .bashrc, and bash functions for shortcuts that take arguments.
iptables Command in Linux: Manage Firewall Rules
Manage Linux firewall rules with iptables. This guide covers tables and chains, listing rules, allowing and blocking ports and IP addresses, setting default policies, and saving rules across reboots.
Bash while Loop: Syntax and Examples
Bash while loop syntax and examples: infinite loops, reading files line by line, arithmetic conditions, and the break and continue statements.
Bash: Check if String Contains Substring
Four ways to check if a string contains a substring in Bash: wildcard matching, the case statement, the regex operator, and grep. Includes examples and a Quick Reference.
Network Bandwidth Monitoring Tools: iftop, nload, bmon, and vnstat
Compare nload, iftop, bmon, and vnstat for checking Linux network bandwidth in real time and tracking historical traffic usage.
rm Command in Linux: Remove Files and Directories
Use the rm command in Linux to delete files and directories, with examples for recursive removal, force mode, prompts, glob patterns, and safer rm -rf usage.
nano Save and Exit: Save Files and Quit the Editor
Save and exit nano with Ctrl+O and Ctrl+X. This guide also shows how to quit without saving, save under a new filename, and handle permission errors.
Bash set Command: set -e, set -x, and set -u Explained
How the bash set builtin changes shell behavior, with practical examples of set -e to exit on errors, set -u to catch unset variables, set -x to trace execution, and pipefail.
How to List Installed Packages on Debian
List installed packages on Debian with apt, dpkg-query, and apt-mark. Includes filtering, installed versions, manual packages, package counts, export lists, and restore commands.
localhost: 127.0.0.1 and Loopback Explained
Localhost is the hostname for your own computer. This guide explains how localhost, 127.0.0.1, ::1, loopback, /etc/hosts, and 0.0.0.0 work on Linux and other systems.
How to Change a Git Commit Message
Change or edit the last Git commit message with git commit --amend, or reword older commits with an interactive rebase. Covers pushed and unpushed commits.
How to Rename a Git Branch: Local and Remote
This guide shows how to rename a Git branch locally and on the remote using git branch -m, then push the new name and delete the old remote branch.
ripgrep Command in Linux: Fast Recursive Search
The ripgrep command searches directories recursively while respecting ignore files. This guide explains rg syntax, file type filters, context lines, replacement previews, and config defaults.
nslookup Command in Linux: Query DNS Records
The nslookup command queries DNS servers for domain records. This guide covers A, MX, NS, TXT, and AAAA lookups, reverse DNS, interactive mode, and choosing a specific name server.
How to Run Linux Commands in the Background
Run Linux commands in the background using &, disown, and nohup. This guide explains how to start background processes, move foreground jobs to the background, and keep processes running after the shell exits.
dig Command in Linux: DNS Lookup
The dig command is a DNS lookup tool for querying name servers. This guide covers querying record types, reverse lookups, tracing resolution paths, and verifying DNSSEC.
How to Add a Directory to PATH in Linux
How to add a directory to the PATH variable in Linux for the current session or permanently, covering user-level and system-wide methods.
