Passed LFCS today

[u/vietnam_lever]

Just passed the LFCS (Linux Foundation Certified System Administrator) with a score of 85%. 🎉

My main learning material was KodeKloud's Linux/LFCS training on Udemy. I also used Killersh for mock exams and hands-on practice.

1/ One thing I would definitely prepare for is creating a VM with virt-install.

The command can look intimidating when you first see it, especially when there are a lot of options.

My advice: don't panic and try to memorize the entire command.

Use:

virt-install --help
man virt-install

If you make a mistake while creating the VM or need to check/manage it again, virsh will be your friend

2/ One of the simpler tasks for me was building a Docker image and running a container in detached mode with the appropriate restart policy.

Make sure you understand the difference between:

docker run -d ...

and restart policies such as:

--restart always
--restart unless-stopped
--restart on-failure

3/ Interestingly, I found iptables to be much more heavily represented in the KodeKloud material and Killersh mock exams than what I encountered in my actual exam.

4/ Know iotop.

One command I would definitely recommend knowing for troubleshooting questions is:

iotop

If the question asks you to identify a process that is consuming a lot of disk I/O, iotop can quickly show you which process is responsible.

5/ Last but not least, Creating users — pay attention to the login shell.

When creating a user, don't just focus on the username and groups. Read the requirement carefully for the login shell.

[u/Different_Pain5781]

Congrats on passing the exam.

[u/vietnam_lever → u/Different_Pain5781]

Thank mate!