Linux Centos 7 – Startup Services – Functions

systemctl disable httpd
Running systemctl disable removes the symlink to the service in /etc/systemd/system/*

systemctl status httpd

systemctl list-unit-files

systemctl start application.service

systemctl list-units –type=service
systemctl list-units –all –state=inactive

systemctl mask nginx.service
systemctl unmask nginx.service

systemctl edit nginx.service

To remove any additions you have made, either delete the unit’s .d configuration directory or the modified service file from /etc/systemd/system. For instance, to remove a snippet, we could type:

sudo rm -r /etc/systemd/system/nginx.service.d
To remove a full modified unit file, we would type:

sudo rm /etc/systemd/system/nginx.service
After deleting the file or directory, you should reload the systemd process so that it no longer attempts to reference these files and reverts back to using the system copies. You can do this by typing:

sudo systemctl daemon-reload

very usefull


Migration to Contabo from SeFlow – Nameserver and DNS

Hi to everybody,

I migrated from SeFlow, good service but awful support.

Only in the person of Matteo Berlonghi.

No professional skill, but I understood how works DNS world.

This is wants to be my personal diary.

Difference between Authority and Registrar.

usefull link to find which nameserver are registered to the Authority: or

in the DNS zone (NS record) you have to insert the nameserver that the Registrar sent to Authority.

to see the propagation: