Linux

List files and directories

Change the current working directory

Show current directory path

Copy files and directories

Move or rename files and directories

Remove files or directories

Create empty file or update timestamps

Create new directories

Display file contents

View file contents interactively

Output first part of files

Output last part of files

Search for patterns in files

Change file permissions

Change file owner and group

Print system information

Report file system disk space usage

Estimate file space usage

Display memory usage

Display Linux processes

Report current processes

Terminate processes by ID

Kill processes by name

Run process in background

Bring job to foreground

Test network connectivity

Configure network interfaces

Print network connections

Remote login program

Securely copy files between hosts

Tape archive utility

Compress files

Package and compress files

Create new user account

Change user password

Modify user account

Debian package management

RPM package management

Search for files in directory hierarchy

Schedule periodic background jobs

Create command shortcuts

Show command history

Synchronize files and directories

Transfer data to/from servers

Download files from web

Enhanced version of top

Vi improved text editor

Simple text editor

SSL/TLS toolkit

Control systemd services

Pattern scanning and processing language

Stream editor for filtering and transforming text

Sort lines of text files

Report or omit repeated lines

Remove sections from each line of files

Print newline, word, and byte counts

Translate or delete characters

Build and execute command lines from standard input

Find files by name using database

Locate a command

Locate binary, source, and manual page files

Make links between files

Mount a filesystem

Unmount a filesystem

Manipulate disk partition table

List information about block devices

List open files and processes

Run commands immune to hangups

Terminal multiplexer program

Modern terminal multiplexer

Display active jobs

Switch to another user account

Execute commands as another user

Print user and group IDs

Print group names a user is in

Show who is logged on

Show who is logged in and what they are doing

Show system uptime and load

Display or set system date

Display calendar