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. ...

Gentoo provides a package called app-admin/ansible for Ansible. To install it, just run: ❯ sudo emerge --ask app-admin/ansible Note that unlike Ansible package on CentOS/Fedora, there is no default ansible.cfg provided with the Gentoo Ansible package. ❯ ansible --version ansible 2.9.9 config file = None configured module search path = ['/home/kenno/.ansible/plugins/modules', '/usr/share/ansible/plugins/modules'] ansible python module location = /usr/lib/python3.7/site-packages/ansible executable location = /usr/lib/python-exec/python3.7/ansible python version = 3.7.7 (default, May 9 2020, 19:52:18) [GCC 9.2.0] Reference: ...

I have a 2TB drive, when connecting to my Fedora workstation, it’s mounted using the UUID of the partition as the following: # mount | grep sde1 /dev/sde1 on /run/media/kenno/f59ffb93-5a92-4af9-a9b5-19ca3bb8aa37 type ext4 (rw,nosuid,nodev,relatime,seclabel,uhelper=udisks2) I think it’ll look nicer if it’s mounted with a shorter name, e.g. ‘Podcast’. The filesystem for this drive is ext4. To create a label on the ext4 filesystem, we can use a program called e2label. The exact command is e2label device [ volume-label ] according to the man page. ...

I’ve switched to use DWM, Dynamic Windows Manager, from GNOME on my laptop since the beginning of this month. So far I really enjoyed it. Here are some commands I needed to know since I have an external screen connected ot this machine. To change the focus to previous/next screen: Mod1 + , Mod1 + . To move applications from a screen to another, just add Shift key: Mod1 + Shift + , Mod1 + Shift + . References: ...

I’ve been meaning to pick up a micro-controller and work on it again. About 5 years ago when I first encountered Arduino, I spent sleepless night learning about it, and creating things from DIY weather station, world clock, light sensor, etc. Fast forward to the current days, I almost forgot everything I learned. But we can always re-learn, or can’t we? Tonight, I found an Stm32 Nucleo F401RE micro-controller, and I want to start by updating the firmware on it (admittedly, this is the easiest thing to do). ST provides a tool called STW-LINK007, which can be freely downloaded from its website, to flash the firmware on a range of its micro-controllers. I have also written a blog post to update a similar micro-controller, STM32F4-Discovery, in the past. ...