How to protect /etc/resolv.conf after reboot? (use the chattr command)

 How to protect /etc/resolv.conf after reboot? 

problems with table create user in icingaweb

problems with table create user in icingaweb: 

db troubleshooting of icinga webpage

 db troubleshooting of icinga webpage: 

How to add "live Suse" to virtualbox

 like this: 

Missing value auth-url required for auth plugin password (openstack)

 

openstack issues

how to check open ports via nc?

 how to check open ports via nc?

$ nc -zv 10.0.32.15 22

-z - only checking, no sending data

-v - verbose

How to check "lastb" in logs? (redhat)

When someone has bad password or not ssh keys.