DEMOS: https://learn.cantrill.io/courses/1820301/lectures/41301327 ; https://learn.cantrill.io/courses/1820301/lectures/41301328 ; and https://learn.cantrill.io/courses/1820301/lectures/41301329

• lsblk: list block devices
• sudo file -s /dev/xvdf: Attempt to read files in device /dev/xvdf, including special files
  • If the device doesn't have a FS: will return data
  • If the device has XFS: will return e.g. SGI XFS filesystem data (blksz 4096, inosz 512, v2 dirs)
  • 💡 The file command by itself determines the type of a file and its data. The command doesn't take the file extension into account, and instead runs a series of tests to discover the type of file data.
• sudo mkfs -t xfs /dev/xvdf: build an XFS file system on the device /dev/xvdf
• sudo mount /dev/xvdf /ebstest: mount FS found on device /dev/xvdf onto directory /ebstest
• df -k: display all disk space information in kB
• sudo blkid: locate/print block device attributes
• Your Linux system's filesystem table, located usually in /etc/fstab, is a configuration table designed to ease the burden of mounting and unmounting file systems to a machine (e.g. every time you launch/restart the system)

## Example: mount an FS on an EBS volume and add a file to it

lsblk
sudo file -s /dev/xvdf
sudo mkfs -t xfs /dev/xvdf
sudo file -s /dev/xvdf
sudo mkdir /ebstest
sudo mount /dev/xvdf /ebstest
cd /ebstest
sudo nano amazingtestfile.txt
# add a message
# save and exit
ls -la