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Browse all Linuxize tutorials, guides, and references.
Bash Arithmetic: Integer and Floating-Point Math
How to do arithmetic in Bash with the (( )) operator, $(( )) expansion, the let builtin, and bc or awk for floating-point math the shell cannot do natively.
Sudo Command in Linux: Run Commands as Root
A complete guide to the Linux sudo command. Learn how to run commands as root, manage sudoers, open a root shell, list privileges, set timeouts, and more.
How to Format USB Drives and SD Cards on Linux
Step-by-step instructions for formatting USB drives and SD cards on Linux using parted and mkfs. Covers FAT32, exFAT, EXT4, and NTFS filesystems with partition table setup and verification.
MySQL SHOW TABLES: List Tables in a Database
Use SHOW TABLES to list tables in a MySQL or MariaDB database. This guide covers filtering with LIKE and WHERE, SHOW TABLE STATUS, and querying information_schema.
How to Use sed to Find and Replace Strings in Files
Replace strings in files with sed: run sed -i 's/old/new/g' file. Covers global, case-insensitive, word-boundary, regex, line-range, and recursive replace.
dnf Command in Linux: Install, Update, and Manage Packages
Common dnf commands for installing, updating, removing, searching, and managing packages on Fedora, RHEL, Rocky Linux, AlmaLinux, and other RPM-based systems.
rsync Exclude Patterns: Skip Files and Directories
Exclude files and directories from an rsync transfer with --exclude and --exclude-from, glob patterns, and dry-run previews, with copy-paste examples.
Docker Networking: Connect Containers
Docker networking controls how containers communicate. This guide covers bridge, host, and none networks, port publishing, container DNS, isolation, and Compose networking.
How to Use the kill Command in Linux
Learn how to use the kill command in Linux to terminate processes, send signals, and reload services with practical examples.
How to Check Your Debian Linux Version
Find which Debian version is installed on your system using the command line. Covers lsb_release, /etc/os-release, hostnamectl, and other methods.
How to List and Delete UFW Firewall Rules
Learn how to list active UFW rules, then delete them by number or specification. Includes status verbose, numbered output, rule reset, and SSH lockout recovery.
How to Install Nginx on Debian 13
Step-by-step instructions for installing and configuring Nginx on Debian 13 Trixie using apt, including UFW rules, the systemd service, and your first server block.
How to Set Up Passwordless SSH Login
Set up passwordless SSH login with Ed25519 or RSA key pairs. Copy public keys with ssh-copy-id, use the ssh-agent, and disable password authentication for hardened access.
How to Remove a Symbolic Link (Symlink) in Linux
Remove symbolic links in Linux with rm, unlink, or find. Clean up broken symlinks and avoid the trailing-slash trap that can remove target directory contents.
df Command in Linux: Check Disk Space Usage
Check disk space usage in Linux with the df command. Human-readable output, filesystem types, inode usage, custom output fields, and df vs du.
Tar Command in Linux: Create and Extract Archives with Examples
Create, extract, list, and compress tar archives in Linux. Examples for gzip, bzip2, xz, and zstd, plus excluding files, wildcard extraction, and stripping path components.
How to Install Podman on Ubuntu: Rootless Container Alternative to Docker
Step-by-step instructions for installing Podman on Ubuntu, running rootless containers, building images with Buildah, and switching from Docker.
Best Linux Distributions for Every Use Case
A practical comparison of the best Linux distributions for beginners, developers, servers, gaming, and security testing.
How to Redirect stderr to stdout in Bash
Redirecting stderr and stdout in Bash using 2>&1, &>, and other operators. Covers file descriptors, appending, piping errors, and discarding output with /dev/null.
awk Command in Linux: Syntax, Patterns, and Examples
awk command examples for Linux, including syntax, patterns, field separators, column extraction, filtering, variables, arrays, and shell usage.
