Linux Command Reference Manual

Search for files and directories in a directory hierarchy based on name, type, size, or modification date.

Search for matching string patterns or regular expressions inside text files.

List directory contents including file sizes, permissions, ownership, and modification timestamps.

Change the current working directory in the shell workspace.

Print the absolute path of the current working directory.

Concatenate and print file contents directly to the terminal standard output.

Change file access permission mode bits for owner, group, and other users.

Change file owner and group attributes.

Create new directories and folder hierarchies.

Remove files or directories from the filesystem.

Copy files and directories to a destination path.

Move or rename files and directories.

Create empty files or update file access and modification timestamps.

Output the first part (top lines) of text files.

Output the last part (bottom lines) of files or stream real-time logs.

Print newline, word, and byte counts for files.

Print text strings or write data to files using shell redirection.

Stream editor for filtering and transforming text using pattern substitutions.

Pattern scanning and column text processing language.

Report a snapshot of currently running system processes.

Display real-time Linux processes and system resource utilization.

Interactive process viewer with colorful CPU meters and mouse support.

Send termination or control signals to processes by PID.

Report file system disk space usage across mounted storage partitions.

Estimate file and directory space usage.

Display total amount of free and used physical memory and swap.

Transfer data from or to a server using HTTP, HTTPS, FTP, and more.

Non-interactive network downloader for HTTP, HTTPS, and FTP.

Archive multiple files into a single tape archive (.tar or .tar.gz).

Compress or expand files using Lempel-Ziv coding (LZ77).

Execute a command with superuser (root) security privileges.

Print the effective username associated with the current shell session.

Display or set system date and time.

Print operating system name and kernel architecture.

Display the list of previously executed terminal commands.

Clear the terminal screen display and scrollback buffer.

Locate the executable binary path of a command in system PATH.

Simple, user-friendly in-terminal text editor.

Highly configurable, powerful modal text editor.

Debian and Ubuntu command-line package management tool.

Generate an ASCII art picture of a cow with a message speech bubble.

Generate large text banners using ASCII art characters.

Display directory structure in a recursive visual tree diagram.

Send ICMP ECHO_REQUEST to network hosts to test connectivity and latency.

Print network connections, routing tables, interface statistics, and listening ports.

Securely log into remote Linux servers and execute commands over encrypted connections.

Securely copy files and directories between hosts over SSH connection.

Fast and versatile remote and local file-copying and synchronization tool.

Control and inspect the systemd system and service manager.

Schedule recurring background cron jobs and automated tasks.

Set and export environment variables to child shell processes.