I do have that file. I am not sure why you do not have it. Can you download the latest version of Junest?
[root@myarch junest]# ls -l /etc/junest/info -rw-r--r-- 1 root root 19 Aug 10 00:20 /etc/junest/info
junest -uinside junest session. Try to exit from junest first and then run
junest -u. Also, consider that
junest -uuses Linux User Namespace but some Linux distros do no have it enabled by default. AFAIK Ubuntu and Arch Linux have that enabled but old distros I do not think they have it.
junest -uworking out of the box. I need to know which distros have the Linux User namespace enabled by default.