Ansible – playbook to update/upgrade servers
Heres an Ansible playbook to update and upgrade Linux servers. Picture: Update six hosts at once.
Ubiquiti Unifi – eating all disk space
What should you do when Ubiquiti Unifi is eating all of the disk space? Webinterface -> Settings -> Maintenance -> Historical Data Retention -> 90 days -> apply -> compact database Further reading: https://community.ui.com/questions/UNIFI-Eating-all-disk-space-or-Mongodb/0d35538e-16e9-45d4-a1e4-c1d8a4c0fc65 https://community.ui.com/questions/Unifi-Controller-5-4-11-on-Ubuntu-Eats-All-Disk-Space/f15b3db7-4e72-455e-8070-1585a91591e8
pfsense – configure port forwarding
Configure port forwarding in pfsense Firewall -> NAT -> Port forward -> Add Protocol: TCP Destination port range: HTTPS Redirect target ip: 192.168.2.130 Redirect target port: HTTPS Description: Allow HTTPS -> Save Check if it’s working Mathiass-MacBook-Pro:~ mathias$ curl -k
Apache2 – hide server version number
How to hide the apache2 server version number root@homeserver:~# nano /etc/apache2/apache2.conf #add at the bottom of the file ServerTokens ProductOnly ServerSignature Off systemctl restart apache2 Before Mathiass-MacBook-Pro:~ mathias$ curl -k –head https://DOMAIN.TLDHTTP/1.1 401 UnauthorizedDate: Sun, 11 Jun 2017 13:18:20
Grafana – data points missing
I found out that my grafana had no data points in the 7 days view. My new icinga2 check worked correctly and produced the right data. The problem nano /etc/icinga2/zones.d/master/services/disks.conf import „10minute-service“ In my apply service declaration i defined the
Debian – Uhrzeit automatisch aktualisieren
Uhrzeit automatisch aktualisieren durch ntpdate und cron Zeitzone einstellen Durch folgenden Befehl könnt ihr eure Zeitzone einstellen (in meinem Fall Deutschland) dpkg-reconfigure tzdata -> Europa -> Berlin ntpdate installieren apt-get install ntpdate cronjob einrichten Folgender cronjob aktualisiert jede Stunde die
Linux – forward email to external domain (postfix)
How to forward an email to an external domain in postfix (linux): Configure postfix like a normal mailserver. In the config you can use virtual_alias_maps to create a mapping table for the delivery of the emails. In this file you
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Icinga2 – disable host services/checks
I wanted to disable a specific host (the services/checks). My raspberry pi is currently without an sd-card and it should not be monitored anymore. I found out that there is a check command „dummy“ which is saying that the service
Impressum vor Bots schützen
Ich wollte mein Impressum vor Bots schützen. Andauernd landen persönliche Daten im Netz. Sei es das WHOIS einer Domain, welches Kontaktdaten enthält (mittlerweile auch geschützter durch die DENIC), oder auch automatisierte Scraper Programme, welche die Daten im Impressum auslesen und auf
