firejail help for novice

[Klaris69]

Hi hi,
i am a newbie in linux and use in firejail :-P
I use: OS Linux Mint 19.1 Mate + firejail_0.9.56.2-LTS_1_amd64.deb
i want to use firejail only to block applications to access the internet.

I used the command: sudo firecfg
I misunderstood the command function,, (I thought it was a function to start the service automatically after the boot)
how can I disable or reset this setting?
when i run firefox and enter "firejail --top" (i see firefox is in firejail mode)

You can tell me how to proceed.
for example, I have a "ABC" folder on my desktop and I have a Double Commander application in it.
what do i do to keep this app running without internet access?

[Klaris69]

Ok, If I'm not mistaken for my first question, the answer is: firecfg --clean

[rusty-snake]

Hi @Klaris69

I misunderstood the command function,, (I thought it was a function to start the service automatically after the boot)

firejail isn't a service, undo with sudo firecfg --clean

You can tell me how to proceed. for example, I have a "ABC" folder on my desktop and I have a Double Commander application in it.
what do i do to keep this app running without internet access?

Use --net=none on the command line or net none in profiles.
Example for mpv (media player):
Command line: firejail --net=none mpv foo.mp4 (works always)
Profiles: add net none to ~/.config/firejail/mpv.local and run firejail mpv foo.mp4 (works only if the application has a firejail profile)

[rusty-snake]

You was faster :joy:

[rusty-snake]

FAQ about this: https://github.com/netblue30/firejail/wiki/Frequently-Asked-Questions#how-do-i-run-vlc-in-a-sandbox-without-network-access

[Klaris69]

Oki, thnaks :-)