Launch a process without networking: unshare -n --map-user=$(id -u) --map-group=$(id -g) curl www.google.com
⚠️ Firejail is complex, buggy and behaves in unexpected ways. AVOID ! Launch a program with /some/path as you home folder: firejail --private=/some/path/ your_program your program arguments wine firejail --profile=wine --private=/tmp/wine/ wine <...>