How to properly mount a disk in an operating system…

Identify the disk name and partition(s). Use the command lsblk or fdisk -l.
```
lsblk
# The output will show block devices and their structure
```
Create a mount point (a directory where the disk will be mounted).
```
sudo mkdir /mnt/mydisk  # Create directory /mnt/mydisk
```
Format the disk/partition if it is not formatted or requires a different filesystem. For example, formatting to ext4:
```
sudo mkfs.ext4 /dev/sdb1  # Format the first partition of disk /dev/sdb to ext4
```
Important: Make sure to select the correct disk/partition before formatting, otherwise data loss may occur.

Mount the disk/partition to the mount point.

sudo mount /dev/sdb1 /mnt/mydisk  # Mount /dev/sdb1 to /mnt/mydisk

Check if the disk is successfully mounted.

df -h  # View information about mounted filesystems

Configure automatic mounting at system startup by adding an entry to /etc/fstab. Obtain the UUID of the disk/partition for reliable mounting.
```
sudo blkid /dev/sdb1  # Get UUID and TYPE of the filesystem
# Example output: /dev/sdb1: UUID="your-uuid-here" TYPE="ext4" PARTUUID="..."
```
Editing /etc/fstab:
```
sudo nano /etc/fstab
# Add a line in the format:
# UUID="your-uuid-here" /mnt/mydisk ext4 defaults 0 2
```
Fields in /etc/fstab:
- UUID/Device: Disk/partition identifier or device path.
- Mount point: Mount point.
- File system type: Filesystem type (ext4, xfs, ntfs, etc.).
- Options: Mount options (defaults, noauto, ro, rw, noexec, nosuid, etc.).
- Dump: Dump utility flag (0 - do not archive).
- Pass: Filesystem check order at boot (0 - do not check, 1 - root, 2 - others).
Check the syntax of /etc/fstab and the ability to mount all entries.
```
sudo mount -a  # Attempt to mount all from /etc/fstab
```
If there are no errors, changes will apply at the next boot.

How to properly mount a disk in an operating system?