Linux basic command day12- Getting started

– Hard disk partitioning and formatting:

1. Disk structure:

Spindle: The spindle is used to hold the disk. The disk will spin rapidly on the spindle, then contact discharge for data exchange. Track: We have platters and spindles and we need to store data, so we set up platters to store data. Sector: Because track access data is messy, we divide the sector.'Note:'
           1.Sectors are not real, knowledge is a unit.2.The sector is the smallest unit. The unit is512Bytes.Copy the code

2. Linux disk creation process:

Hard disk identification -->> Partition -->> format -->> mount useCopy the code

We can see that we now have two hard drives, and we’re going to add disks.

Next all the way down to the figure below

complete

determine

Restart the host

     lsblk
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We have the hard drive and we partition it.

      'Note:'We have two modes for partitioning, MBR and GPTCopy the code

The MBR.1.MBR also known as MSDOS partition mode, master boot record partition mode.2.MBR partitioning mode opens up one512The sector of bytes used to hold the boot program and partition table.3.The partition table size is64The partition table records the storage information of each partition. A partition16Bytes.4.The MBR is most4Two primary partitions. (If divided4Two primary partitions and the rest of our space is unusable.Copy the code

Partitions: primary, extended, logical

     'Note:'
          1.The extended partition cannot store data directly, but must be divided into logical partitions.2.In theory, extended partitions can be divided into an infinite number of logical partitions.Copy the code

Fdisk -lu /dev/sdcCopy the code

     fdisk
     
            1.N Creating a Partition2.P Viewing Partitions3.Wq Save the configuration and exit4.D Deleting a Partition5.M Displays the help manualCopy the code

Presentation:

     lsblk
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After we partition, we can’t store the data, we have to format it.

     mkfs.ext4 /dev/sdc1
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     'Note:'
           1.Format: ext3, ext4. XFS, VFAT and so on2.Ext4 works with C63.XFS works with C7Copy the code

After formatting, we mount it.

     mount /dev/sdc1 ./dvd
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So we can use the storage space we’ve built.

3. Unmount the hard disk:

Umount./ DVD (unmount)Copy the code

     fdisk /dev/sdc 
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