磁盘分区
作者：互联网
格式
[root@localhost ~]# cat /etc/filesystems xfs ext4 ext3 ext2 nodev proc nodev devpts iso9660 vfat hfs hfsplus *
查看系统分区格式
[root@localhost ~]# mount sysfs on /sys type sysfs (rw,nosuid,nodev,noexec,relatime) proc on /proc type proc (rw,nosuid,nodev,noexec,relatime) devtmpfs on /dev type devtmpfs (rw,nosuid,size=12249640k,nr_inodes=3062410,mode=755) securityfs on /sys/kernel/security type securityfs (rw,nosuid,nodev,noexec,relatime) tmpfs on /dev/shm type tmpfs (rw,nosuid,nodev) devpts on /dev/pts type devpts (rw,nosuid,noexec,relatime,gid=5,mode=620,ptmxmode=000) tmpfs on /run type tmpfs (rw,nosuid,nodev,mode=755) tmpfs on /sys/fs/cgroup type tmpfs (ro,nosuid,nodev,noexec,mode=755) cgroup on /sys/fs/cgroup/systemd type cgroup (rw,nosuid,nodev,noexec,relatime,xattr,release_agent=/usr/lib/systemd/systemd-cgroups-agent,name=systemd) pstore on /sys/fs/pstore type pstore (rw,nosuid,nodev,noexec,relatime) cgroup on /sys/fs/cgroup/devices type cgroup (rw,nosuid,nodev,noexec,relatime,devices) cgroup on /sys/fs/cgroup/cpu,cpuacct type cgroup (rw,nosuid,nodev,noexec,relatime,cpuacct,cpu) cgroup on /sys/fs/cgroup/blkio type cgroup (rw,nosuid,nodev,noexec,relatime,blkio) cgroup on /sys/fs/cgroup/freezer type cgroup (rw,nosuid,nodev,noexec,relatime,freezer) cgroup on /sys/fs/cgroup/perf_event type cgroup (rw,nosuid,nodev,noexec,relatime,perf_event) cgroup on /sys/fs/cgroup/net_cls,net_prio type cgroup (rw,nosuid,nodev,noexec,relatime,net_prio,net_cls) cgroup on /sys/fs/cgroup/memory type cgroup (rw,nosuid,nodev,noexec,relatime,memory) cgroup on /sys/fs/cgroup/pids type cgroup (rw,nosuid,nodev,noexec,relatime,pids) cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb) cgroup on /sys/fs/cgroup/cpuset type cgroup (rw,nosuid,nodev,noexec,relatime,cpuset) configfs on /sys/kernel/config type configfs (rw,relatime) /dev/mapper/centos-root on / type ext4 (rw,relatime,data=ordered) systemd-1 on /proc/sys/fs/binfmt_misc type autofs (rw,relatime,fd=36,pgrp=1,timeout=0,minproto=5,maxproto=5,direct,pipe_ino=16330) debugfs on /sys/kernel/debug type debugfs (rw,relatime) mqueue on /dev/mqueue type mqueue (rw,relatime) hugetlbfs on /dev/hugepages type hugetlbfs (rw,relatime) /dev/sda1 on /boot type ext4 (rw,relatime,data=ordered) tmpfs on /run/user/0 type tmpfs (rw,nosuid,nodev,relatime,size=2452320k,mode=700)
分区
[root@localhost ~]# fdisk /dev/sdb
Welcome to fdisk (util-linux 2.23.2).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1): 1
First sector (2048-209715199, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199): +100G
Value out of range.
Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199): 209715199
Partition 1 of type Linux and of size 100 GiB is set
Command (m for help): p
Disk /dev/sdb: 107.4 GB, 107374182400 bytes, 209715200 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
Disk label type: dos
Disk identifier: 0x2a626cb8
Device Boot Start End Blocks Id System
/dev/sdb1 2048 209713151 104855552 83 Linux
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.格式化mke2fs -t:指定要格式化的文件系统 -b：指定块大小 -m：指定格式化给root预留的空间大小默认5%，mke2fs -m 1 /dev/sdb1
[root@localhost ~]# mke2fs -t ext4 /dev/sdb1 mke2fs 1.42.9 (28-Dec-2013) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 6553600 inodes, 26213888 blocks 1310694 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2174746624 800 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done
mkfs.ext4 /dev/sdb1
mkfs.xfs /dev/sdb1
mkfs.xfs -f /dev/sdb1
查看一个未挂载的分区blkid
[root@localhost ~]# blkid /dev/sdb1 /dev/sdb1: UUID="c2dea846-999b-4b9f-b84c-c990b019e71b" TYPE="ext4"
挂载分区mount
[root@localhost ~]# mount /dev/sdb1 /mnt/ [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 37G 5.3G 30G 16% / devtmpfs 12G 0 12G 0% /dev tmpfs 12G 0 12G 0% /dev/shm tmpfs 12G 8.8M 12G 1% /run tmpfs 12G 0 12G 0% /sys/fs/cgroup /dev/sda1 976M 115M 794M 13% /boot tmpfs 2.4G 0 2.4G 0% /run/user/0 /dev/sdb1 99G 61M 94G 1% /mnt
卸载分区umount
[root@localhost ~]# umount /mnt [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 37G 5.3G 30G 16% / devtmpfs 12G 0 12G 0% /dev tmpfs 12G 0 12G 0% /dev/shm tmpfs 12G 8.8M 12G 1% /run tmpfs 12G 0 12G 0% /sys/fs/cgroup /dev/sda1 976M 115M 794M 13% /boot tmpfs 2.4G 0 2.4G 0% /run/user/0
umount -l /mnt 懒人模式，就算在挂载目录分区里也可以将他卸载掉
永久挂载更改配置文件：vim /etc/fstab
# # /etc/fstab # Created by anaconda on Sat Oct 12 08:26:59 2019 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # /dev/mapper/centos-root / ext4 defaults 1 1 UUID=2d255c32-de95-4c8b-a3f9-ff736f24df43 /boot ext4 defaults 1 2 /dev/mapper/centos-swap swap swap defaults 0 0 /dev/sdb1 /mnt ext4 defaults 0 0
标签：relatime,rw,dev,cgroup,磁盘分区,type,nodev 来源： https://blog.51cto.com/u_12922638/2776088