Useful commands

Network speed quality

Since macOS Monterey is there a command to test your network quality:

networkQuality -v

Output will looks like follow:

==== SUMMARY ====
Upload capacity: 16.239 Mbps
Download capacity: 475.129 Mbps
Upload flows: 20
Download flows: 12
Responsiveness: Low (154 RPM)
Base RTT: 26
Start: 19.04.2022 13:56:47
End: 19.04.2022 13:57:04
OS Version: Version 12.3.1 (Build 21E258)

If you’re curious, networkQuality uses Apple’s CDN at as the target for its testing.

List all mounted drives on Mac

df -h

Open any source

open # [url|filename|directory...]

Prevent the system from sleeping

The caffeinate command is used to prevent a Mac from going to sleep.

  • -d - Prevent the display from sleeping.
  • -i - Prevent the system from idle sleeping.
  • -m - Prevent the disk from idle sleeping.
  • -s - Prevent the system from sleeping. This assertion is valid only when system is running on AC power.
  • -u - Declare that a user is active. If the display is off, this option turns the display on and prevents the display from going into idle sleep.
  • -t - Specifies the timeout value in seconds for which the command is valid.
  • -w - Waits for the process with the specified pid to exit.
caffeinate -i make
# caffeinate forks a process, execs "make" in it 
# and prevents idle sleep as long as that 
# process is running
caffeinate -t 18000 # 18000 seconds

Or you can just use free app KeepingYouAwake