permission error: nyx requires executable permission bit for `/var/lib/tor`
Offending logs from strace:
stat("/var/lib/tor/control_auth_cookie", 0x7ffca7ba61f0) = -1 EACCES (Permission denied) stat("/var/lib/tor/control_auth_cookie", 0x7ffca7ba61f0) = -1 EACCES (Permission denied) write(1, "We were unable to read tor's aut"..., 176We were unable to read tor's authentication cookie... Path: /var/lib/tor/control_auth_cookie Issue: Authentication failed: '/var/lib/tor/control_auth_cookie' doesn't exist) = 176
Permissions on /var/lib/tor:
drwx------ 3 tor tor 4.0K Feb 14 17:04 tor
Permissions for cookie file:
-rw-r----- 1 tor tor 32 Feb 13 06:36 control_auth_cookie
A quick fix on the user part is to add the executable bit for group, but in general the cookie file should be accessible without the executable bit set so as long as the cookie file is configured to be readable by group (i.e. 'CookieAuthFileGroupReadable 1' written in /etc/tor/torrc).