常用查询命令
- 查看当前磁盘及分区情况
df -h
fdisk -l
- fdisk 命令说明
| 参数 | 作用 |
| m | 查看全部可用的参数 |
| n | 添加新的分区 |
| d | 删除某个分区信息 |
| l | 列出所有可用的分区类型 |
| t | 改变某个分区的类型 |
| p | 查看分区表信息 |
| w | 保存并退出 |
| q | 不保存直接退出 |
新增分区
- 开始挂载空闲硬盘
fdisk /dev/vdb
- 输入p查看当前硬盘
root@chongzhuang-ghj-redhat6-01-20210:~# fdisk /dev/vdb Welcome to fdisk (util-linux 2.27.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Device does not contain a recognized partition table. Created a new DOS disklabel with disk identifier 0xdc60fc48. Command (m for help): p Disk /dev/vdb: 1000 GiB, 1073741824000 bytes, 2097152000 sectors 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: 0xdc60fc48
- 输入n创建新分区
这里依次输入了四个参数
参数一:主分区(p)还是扩展分区(e) 我这里选择了主分区
参数二:主分区的编号默认是1 我这里也输入1
参数三:扇区起始位置 直接回车不输入选默认
参数四: 定义下整个分区的大小 我这里输入900000
Command (m for help): n Partition type p primary (0 primary, 0 extended, 4 free) e extended (container for logical partitions) Select (default p): p Partition number (1-4, default 1): 1 First sector (2048-2097151999, default 2048): Last sector, +sectors or +size{K,M,G,T,P} (2048-2097151999, default 2097151999): 900000 Created a new partition 1 of type 'Linux' and of size 438.5 MiB.
- 保存退出
输入w 命令
Command (m for help): w The partition table has been altered. Calling ioctl() to re-read partition table. Syncing disks.
- 查看分区
file /dev/vdb1
- 格式化分区
root@chongzhuang-ghj-redhat6-01-20210:~# mkfs.xfs /dev/vdb1 meta-data=/dev/vdb1 isize=512 agcount=4, agsize=28061 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=1, sparse=0 data = bsize=4096 blocks=112244, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal log bsize=4096 blocks=855, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0
- 挂载到文件夹
root@chongzhuang-ghj-redhat6-01-20210:~# cd / root@chongzhuang-ghj-redhat6-01-20210:/# mkdir /data root@chongzhuang-ghj-redhat6-01-20210:/# ^C root@chongzhuang-ghj-redhat6-01-20210:/# mount /dev/vdb1 /data root@chongzhuang-ghj-redhat6-01-20210:/# df -h Filesystem Size Used Avail Use% Mounted on udev 7.9G 0 7.9G 0% /dev tmpfs 1.6G 73M 1.5G 5% /run /dev/vda1 78G 73G 1.7G 98% / tmpfs 7.9G 1.1M 7.9G 1% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 7.9G 0 7.9G 0% /sys/fs/cgroup tmpfs 1.6G 0 1.6G 0% /run/user/0 none 78G 73G 1.7G 98% /var/lib/docker/aufs/mnt/c66a3d8b2e9fcb96c8a842f985baf8cd45a9971042c882daab583a0892e7afdf shm 64M 0 64M 0% /var/lib/docker/containers/ff4ecd20fdaf7667aa4f3583726f1e670b8c2c7068b7620e802bdba0f05fff1d/shm /dev/vdb1 436M 23M 414M 6% /data root@chongzhuang-ghj-redhat6-01-20210:/#
删除分区
卸载正在使用的硬盘分区
删除对应分区
root@chongzhuang-ghj-redhat6-01-20210:~# umount /data root@chongzhuang-ghj-redhat6-01-20210:~# fdisk /dev/vdb Welcome to fdisk (util-linux 2.27.1). Changes will remain in memory only, until you decide to write them. Be careful before using the write command. Command (m for help): p Disk /dev/vdb: 1000 GiB, 1073741824000 bytes, 2097152000 sectors 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: 0xdc60fc48 Device Boot Start End Sectors Size Id Type /dev/vdb1 2048 2097151800 2097149753 1000G 83 Linux Command (m for help): d Selected partition 1 Partition 1 has been deleted.
如果要重新挂载该分区 注意生成后格式化
mkfs -t ext4 /dev/vdb1