How do run a command without internet access?

General system
1

While I have access to the Internet, how can I execute a command that does not have access to the Internet?

2

One simple way is to use firejail and block network access with it.

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3

firejail is for programs and set config firejail
It is not possible to create configuration for normal commands

4

What do you mean “normal commands”? Unless they are shell builtins, all commands are programs.

For example, if you want a bash shell without network access: firejail --net=none bash

You should be able to replace bash with almost any command.

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5

Oh, I thought I should make a firejail config for each command
Thankful

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