mount -a <===> namontuje vsechny hdd do systemu z fstab (sikovne pokud nenejede system a musim vse ruco delat z root uctu) // mounts all filesystems in /etc/fstab. If the drive is not yet in fstab, then it will do nothing with regard to that drive.

## Q:Do I need to restart my server after editing fstab and mtab
## A:No, there is no need to reboot after editing /etc/fstab. You can testdrive with mount -a
## Note that it is a bad practice to use mount -a for fstab checking. The recommended solution is findmnt --verify

## Mount the new disk using the mount command. First, you’ll need to create a mount point. We’ll use /disk2. This is where we’ll mount /dev/sdb1. Enter the following commands:
# cd /
# mkdir disk2
# mount /dev/sdb1 /disk2
# df -hT