Disable networking/internet from command line on a Mac

If you want to quickly disable internet/networking to test offline features. Doing it frequently with System preferences GUI is quite a slow workflow.

Here is the command to disable your ethernet quickly.

**sudo ifconfig en0 down**

to activate it again

**sudo ifconfig en0 up**

If you are connected via wireless you can disable it with

**networksetup -setairportpower en1 off**

to activate it again, use

**networksetup -setairportpower en1 on**

en0 and en1 are device name, which you can get from running the following command

**networksetup -listallhardwareports**

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