Also tried with qdbus with the following line (as I'm using KDE) :
qdbus --system org.freedesktop.login1 /org/freedesktop/login1 org.freedesktop.login1.Manager.CanReboot
Error: org.freedesktop.DBus.Error.Spawn.ExecFailed
Cannot launch daemon, file not found or permissions invalid
Also tried with qdbus with the following line (as I'm using KDE) : .login1 /org/freedeskto p/login1 org.freedesktop .login1. Manager. CanReboot .DBus.Error. Spawn.ExecFaile d
qdbus --system org.freedesktop
Error: org.freedesktop
Cannot launch daemon, file not found or permissions invalid