Linux

• journalctl -f to follow the system log.

File System

• /etc/fstab holds a list of devices mounted.
• parted for managing partitions.
• mount displays mounted filesystems.
• lsblk lists all block devices, whether mounted or not.
• mkfs to create file system (formatting)
• dd if=input_file of=output_file, used for cloning drives, the arguments can be block device or an img file, or an iso file.
• Use -o loop -t iso9660 to mount an ISO file.
• sha256sum -c --ignore-missing sha256sum.txt

Networking