Determine which package provides a command

Redhat/Centos (yum)

yum provides */filename

Ubuntu/Debian (apt)

apt-file update
apt-file search filename

Set Linux reboot parameter

I had an issue with my NVME SSD disappearing after soft reboot, reappearing back after power cycle. I fixed it by adding reboot=pci kernel parameter. I added it to GRUB_CMDLINE_LINUX_DEFAULT parameter within /etc/default/grub file Then need to run update-grub, reboot, and the subsequent reboots had no issue with ssd.

Mounting filesystems using systemd mount units

Mount ext4 by label

In this example we mount an ext4 filesystem with label EXT1 to /mnt/EXT1.