Centos /Cloudlinux 7 error restarting a systemd service
Unable to register authentication agent
** (pkttyagent:478736): WARNING **: 18:16:34.777: Unable to register authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject Error registering authentication agent: GDBus.Error:org.freedesktop.PolicyKit1.Error.Failed: Cannot determine user of subject (polkit-error-quark, 0)
# groupadd -g 23 nohidproc # usermod -a -G nohidproc polkitd # mount -o remount,rw,hidepid=2,gid=nohidproc /proc # systemctl restart polkit