Hi everyone, i recently installed fedora 25 on my laptop. During the post-installation phase, i installed nmap and its GUI, Zenmap. I tried to execute zenmap with the command "sudo zenmap" but it prints the following lines:
No protocol specified
No protocol specified
Error: could not open display
At this point i tested the command with different tools like gedit, libreoffice, ecc... But the result is similar. What can i do? Thanks in advance.
This workaround works for me
$ xhost si:localuser:root
$ sudo zenmap
Is this workaround secure or does it leavwe a gap in security -- establish a new attack vector? It's recommended not to use the root login, but that is a very practical if insecure workaround too, but obviously not 'safe' way to go -- and that's a bit hyperbolic but hopefully illustrative
tauceti ( 2017-03-15 23:32:31 +0000 )editThey note that you can remove the permissions after you're done by running xhost -si:localuser:root
Asked: 2017-03-01 11:15:56 +0000
Seen: 488 times
Last updated: Mar 01 '17
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I think that the problem colud be this In short, since Fedora uses Wayland, it is not possible to use sudo to open graphical applications.
alcir ( 2017-03-01 15:53:54 +0000 )edit