/boot
swap
查看已经挂载的分区
# df -h
查看所有磁盘信息
# fdisk -l
单独查看指定磁盘信息
# fdisk -l /dev/sdb
分区操作
# fdisk /dev/sdb
[root@server ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.37.4).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
#正常提示
Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0x0df723ea.
Command (m for help): m #查看帮助
Command (m for help): p #查看分区信息
Disk /dev/sdb: 5 GiB, 5368709120 bytes, 10485760 sectors
Disk model: VMware Virtual S
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: dos
Disk identifier: 0x0df723ea
Command (m for help): n # new一个新的分区
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p # 主分区
Partition number (1-4, default 1):
First sector (2048-10485759, default 2048): # 开始的位置
Last sector, +/-sectors or +/-size{K,M,G,T,P} (2048-10485759, default 10485759): +500M # 结束的位置
Created a new partition 1 of type 'Linux' and of size 500 MiB.
Command (m for help): w #保存
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.
2.分区
m 帮助
p 打印分区信息
n 新建分区
MBR 最多支持4个大(p或e)分区
p primary 主分区 必须存在
e extented 扩展分区
l logical 逻辑分区 做多个
1个主
1个扩展（剩余所有空间）
多个逻辑分区
GPT 最多支持128个主分区
p primary
d 删除分区
切换分区表0
g 切换成gpt分区
o 切换成mbr分区