Which of the following commands partitions the second hard disk on a Linux system?

The command to partition the second hard disk on a Linux system is fdisk. Here are the steps:

1. Open the terminal.

2. Type sudo fdisk /dev/sdb and press Enter. Here, /dev/sdb is typically the second hard disk in a Linux system. If your second hard disk has a different name, replace /dev/sdb with the appropriate name.

3. You will be prompted to enter your password. Type your password and press Enter.

4. You will now be in the fdisk utility. Type n to create a new partition and press Enter.

5. Follow the prompts to specify the size and location of the partition. If you want to use the entire disk, you can simply press Enter to accept the default values.

6. Once you have created the partition, type w to write the changes to the disk and exit fdisk.

7. The new partition will now be available on your system. You may need to format it before you can use it, depending on your needs.

Please note that this operation can cause data loss if not done correctly. Always make sure to backup any important data before partitioning a disk.