Linux Commands
Command references for core Linux tools, syntax, examples, and practical one-liners.
tee Command in Linux with Examples
Use the tee command to save command output to a file while still printing it in the terminal. Covers appending, writing to multiple files, capturing errors, and sudo tee for root-owned files.
/etc/passwd in Linux: File Format and Fields Explained
The cat /etc/passwd command displays local Linux accounts. This guide explains its seven fields and when to use getent passwd instead.
du Command in Linux: Check Disk Usage with du -sh
du -sh prints the total size of a directory in one line. See how to list subdirectory sizes, include hidden files, stay on one filesystem with -x, and sort by size.
nvidia-smi Command in Linux: Monitor GPU Usage
Monitor NVIDIA GPU usage on Linux with nvidia-smi. Read memory, temperature, and power metrics, track processes, and log GPU statistics to CSV.
How to Check the Kernel Version in Linux
Run uname -r to print the running Linux kernel version. This guide also covers hostnamectl, /proc/version, listing installed kernels, and spotting a pending reboot.
locate Command in Linux: Find Files Quickly
The locate command finds files by name in a fraction of a second by searching a prebuilt index. Covers plocate, updatedb, exact name matches, and regex.
gzip Command in Linux
Compress and decompress files with the gzip command in Linux. Covers keeping originals, compression levels, directories, listing, and testing .gz files.
usermod Command in Linux: Modify User Accounts and Groups
Modify Linux user accounts with usermod: add users to groups with -aG, change the shell or home directory, rename users, set passwords, and lock accounts.
Netcat (nc) Command in Linux with Examples
Netcat (nc) command examples for Linux: check a port with nc -zv, scan port ranges, open listeners, transfer files, and set timeouts with -w.
How to Truncate Files in Linux: Empty Files Without Deleting
Empty a file without deleting it using shell redirection or the truncate command. Covers permissions, sudo workarounds, and truncating log files.
touch Command in Linux: Create Files and Update Timestamps
The touch command creates empty files and updates file timestamps in Linux. This guide covers access time, modification time, custom timestamps, and reference file usage.
How to Force git pull to Overwrite Local Files
Replace a local Git branch with its remote version safely using fetch and reset, with backup steps for commits, modified files, and untracked files.
How to Use Linux Screen
Keep commands running after you disconnect from SSH with GNU Screen. Start, detach, reattach, list, and kill sessions, plus windows, scrollback, and .screenrc.
git switch: Switch and Create Branches
Switch Git branches, create new branches, track remote branches, and handle uncommitted changes with practical git switch examples.
tmux Command in Linux: Sessions, Windows, and Panes
The tmux command lets you run persistent terminal sessions with multiple windows and panes. This guide covers creating and managing sessions, splitting panes, copy mode, and configuration.
Hard Link vs Symbolic Link in Linux: Symlinks and Inodes Explained
Symlink vs hard link in Linux: a hard link is a second name for the same inode, and a symlink stores a path to another file. See when each one breaks and which to use.
Best Terminal File Managers for Linux
Compare Midnight Commander, Yazi, ranger, lf, and nnn, with installation commands, screenshots, and practical advice for choosing a Linux terminal file manager.
