My syslog is being flooded be the following, which is obviously WLAN connection related.
This question is How to disable logging of wpa_supplicant into syslog?
Nov 16 03:58:14 vb-nb-mint wpa_supplicant[1523]: wlan0: WPA: Group rekeying completed with 30:b5:c2:b9:c8:f2 [GTK=CCMP]
EDIT1: I think my question is different, because I don't even know what wpa_supplicant is doing in the background and not in some script. I am on Mint 18 and just want a clean syslog without this.