mkfs:tldr:3d74d
The command "mkfs" is used to create a file system on a storage device or partition. It stands for "make file system." In this case, the "-t" option specifies the type of file system to be created.
The variable "${ext4}" is likely an environment variable that holds the value "ext4," which indicates that an Ext4 file system should be created. Ext4 is a popular file system used by many Linux distributions.
The variable "${path-to-partition}" represents the path to the partition on which the file system will be created. For example, it could be something like "/dev/sdb1" or "/dev/nvme0n1p2," depending on the device and partition you want to format.
Overall, this command is used to create an Ext4 file system on a specific partition by specifying the type of file system and the path to the partition.