Moving a boot disk RH8/Centos8

I ran into an issue where I had a usb ssd drive that I built Centos 8 upon. After I relocated it to the onboard controller I preceded to boot the system and wallah! Warning: /dev/centos/root does not exist Warning: /dev/centos/swap does not exist Warning: /dev/mapper/centos-root does not exist ... dracut# To no surprise I … Continue reading Moving a boot disk RH8/Centos8

Using nohup, “&” and disown in Linux

Linux has a few options on getting a command to run in background and if desired keep it running even if there is a terminal session interruption. So what's the difference and why you may use one vs. the other? To understand when and why lets take a look at what each once does in … Continue reading Using nohup, “&” and disown in Linux

ZFS command line reference (Cheat sheet)

Pool Related Commands # zpool create datapool c0t0d0Create a basic pool named datapool# zpool create -f datapool c0t0d0Force the creation of a pool# zpool create -m /data datapool c0t0d0Create a pool with a different mount point than the default.# zpool create datapool raidz c3t0d0 c3t1d0 c3t2d0Create RAID-Z vdev pool# zpool add datapool raidz c4t0d0 c4t1d0 … Continue reading ZFS command line reference (Cheat sheet)

Redhat 8 Boot Single User Mode via Serial Console

To boot into single user mode via the serial console you need to edit grub before it boots. When it starts booting you will see the grub menu, before it starts hit the "e" key to edit. You will see something similar as below. Change the information to whats shown below in BOLD ====================load_video set … Continue reading Redhat 8 Boot Single User Mode via Serial Console