You need to apply a file system to a partition you have created. What command should you use?

To apply a file system to a partition you have created, you can use the mkfs command in Linux. Here are the steps:

1. Open a terminal.

2. You need to know the name of the partition you want to format. You can use the fdisk -l command to list all the partitions. The partitions are usually named /dev/sda1, /dev/sda2, etc.

3. Once you know the partition name, you can format it. For example, if you want to format the partition /dev/sda1 to ext4, you would use the command sudo mkfs.ext4 /dev/sda1.

4. The system will format the partition and apply the file system. This process can take a few minutes depending on the size of the partition.

Remember to replace /dev/sda1 with the name of your partition and ext4 with the file system you want to use. Also, be careful, formatting a partition will erase all data on it.