Passed EX415 Linux Security

The exam was 4 hour long. I managed to finish all questions in 3 hours. Fortunately, I found a mistake in the last hour. I think the EX415 exam wasn’t too difficult and pretty confident that I did well. The most difficult part: not knowing what I did wrong. Or how the marker scripts would like to see our answers. I suspected there was a mistake in a question, but who to ask since there is a NDA?...

September 10, 2020 · 1 min · 185 words · kenno

Managing File System Encryption with LUKS

Last year, I already wrote a blog post about the same topic: Configure Encrypted Storage With LUKS, and I had used fdisk to create a disk partition. In this post, I’ll use parted to achieve the same thing. I’m going to perform this operation on a server called servera on a disk device /dev/vdb. First, let’s verify that vdb is available and has no partition: [root@servera ~]# parted -l ... Error: /dev/vdb: unrecognised disk label Model: Virtio Block Device (virtblk) Disk /dev/vdb: 1074MB Sector size (logical/physical): 512B/512B Partition Table: unknown Disk Flags: Use parted to create a partition on vdb using the whole disk....

June 28, 2020 · 3 min · 502 words · kenno

Configure Encrypted Storage With LUKS

I’m currently preparing for the Red Hat Certified Specialist in Security: Linux exam (EX415). One of the exam objectives is about storage encryption using LUKS. Here’s my note learning about LUKS. It’s not meant to be a guide which you should copy and paste and run it on your production system. Suppose I have a new disk (/dev/vdb) attached to my server and I’d like to use it as an encrypted storage using LUKS....

August 29, 2019 · 3 min · 436 words · kenno