Cheat Sheet logoCheat Sheet Today
Linux Command Cheat Sheet/Open TCP or UDP connections

Use netcat for port checks and simple listeners.

Back to sheetBrowse commands
Sign in to save
Section: Networking and Remote Access

Open TCP or UDP connections

bash
bash
nc -vz example.com 443
Explanation

Excellent for quick TCP connectivity tests.

View in sheet →

Learn the surrounding workflow

Compare similar commands or jump into common fixes when this command is part of a bigger troubleshooting path.

Compare commandsView fixes

Related commands

Same sheet · prioritizing Networking and Remote Access
Print working directory
Show the current absolute path.
OpenIn sheetbash
Create file or update timestamp
Create an empty file if it does not exist.
OpenIn sheetbash
Print file contents
Concatenate and print files to standard output.
OpenIn sheetbash
Search text with grep
Print lines matching a pattern.
OpenIn sheetbash
List permissions
Show permissions and ownership on files.
OpenIn sheetbash
List directory contents
List files and directories.
OpenIn sheetbash