Systemd tip.

Share this link

With systemd, services can be socket-activated, D-Bus-activated or manually started.
This means you have to be very cautious when stopping a service and take extra precaution if you don’t want it to restart!
Previously with RHEL 6, to stop the NetworkManager service for example, you had to type:

# service NetworkManager stop; chkconfig NetworkManager off

In the new RHEL 7 world, you will have to type:

# systemctl disable NetworkManager; systemctl stop NetworkManager

It’s disable then stop and not the other way around!
If you don’t follow this rule, you will be sometimes surprised to see your service still running: it will have been restarted by another process!
This is a true story that happened with the NetworkManager service.
Be assured this will happen again if you are not careful!

Posted in RHEL7

Upcoming Events (Local Time)

There are no events.

RHCSA7: Task of the day

Allowed time: 5 minutes.
Create two users "tom" and "engine". "tom" has the UID/GID 3000 and "engine" the UID/GID 4000. "engine" doesn't have an interactive shell.

RHCE7: Task of the day

Allowed time: 10 minutes.
Change the SSH process configuration to only listen on the 443 port.

Follow me on Twitter

Poll for favorite RHEL 7 book

What is your favorite RHEL 7 book to prepare RHCSA & RHCE exams?

View Results

Loading ... Loading ...

Poll for most difficult RHCSA 7 topic

What do you think is the most difficult RHCSA 7 topic?

View Results

Loading ... Loading ...

Poll for most difficult RHCE 7 topic

What do you think is the most difficult RHCE 7 topic?

View Results

Loading ... Loading ...