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