( cd / && run-parts --report /etc/cron.daily ) 47 6 * * 7 root test -x /usr/sbin/anacron
Do not collect distribution statistics - Does not collect basic statistics or distribution statistics on the columns.
I forgat to add that I let run "vnstat -u -i wlan0" (and same for the other devices) as ROOT. And one more thing: You have to check whether you are using systemd, init or upstart and start the daemon according to this.
Sorry I had to make this its own answer instead of editing Boby's since my edit was rejected :| By default, when you install vnstat, it auto starts a vnstatd daemon, which collects metrics every 30 seconds and "updates them" (for all local devices) every 5 minutes.
So in essence, after installing vnstat packet, you should start to see metrics 5 minutes later. It creates /var/lib/vnstat in such a way that it isn't writable by user vnstat so vnstat program only works when run as root (the daemon runs as user vnstat).
You can check if this is your problem by running this: /var/lib/vnstat$ ls -la total 16 drwxr-xrwx 2 vnstat vnstat 4096 May 16 .