unshare

Execute a command in new user-defined namespaces. More information: https://www.kernel.org/doc/html/latest/userspace-api/unshare.html.

Execute a command without sharing access to connected networks:

unshare --net {{command}} {{command_arguments}}
Execute a command as a child process without sharing mounts, processes, or networks:

unshare --mount --pid --net --fork {{command}} {{command_arguments}}