Linux挂载分区的脑残篇，新手必看，老鸟绕道

需求：需要把系统盘搞到/home 下面。

思考：/home 下面是用户默认的家目录，如果用户家目录有数据是会被覆盖的。找朋友确认是刚安装的系统才开始搞的。更改分区大小首先想到的是lvm，但是看了客户的磁盘信息发现不需要考虑这些，怎么简单怎么来。

查看硬盘信息

[root@localhost /]# fdisk -l            查看硬盘信息    Disk /dev/sda: 240.1 GB, 240057409536 bytes, 468862128 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: 0x00085ef7       Device Boot      Start         End      Blocks   Id  System  /dev/sda1   *        2048     1026047      512000   83  Linux  /dev/sda2         1026048    17803263     8388608   82  Linux swap / Solaris  /dev/sda3        17803264   468860927   225528832   83  Linux    Disk /dev/sdb: 240.1 GB, 240057409536 bytes, 468862128 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 /dev/sdc: 500.1 GB, 500107862016 bytes, 976773168 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: 0x0007a974       Device Boot      Start         End      Blocks   Id  System  /dev/sdc1            2048   976773119   488385536   8e  Linux LVM    Disk /dev/sdd: 240.1 GB, 240057409536 bytes, 468862128 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: 0x000a4688       Device Boot      Start         End      Blocks   Id  System  /dev/sdd1   *        2048     1026047      512000   83  Linux  /dev/sdd2         1026048   468860927   233917440   8e  Linux LVM  

数据的操作是需要非常严谨的，看到了这么多的硬盘，有看到了lvm分区。对于新装的系统我第一感觉是：难道要我修复lvm分区吗？经过和朋友确认发现我想多了，只是挂载，磁盘已经拔掉了。

找到对应硬盘分区格式化
磁盘分区

[root@localhost /]# fdisk /dev/sdb              \针对第二块盘分区  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.    Device does not contain a recognized partition table  Building a new DOS disklabel with disk identifier 0x6511fa23.    Command (m for help): p                   \查看已有分区    Disk /dev/sdb: 240.1 GB, 240057409536 bytes, 468862128 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: 0x6511fa23       Device Boot      Start         End      Blocks   Id  System    Command (m for help): n                    \创建分区  Partition type:     p   primary (0 primary, 0 extended, 4 free)     e   extended  Select (default p): p                        \主分区  Partition number (1-4, default 1):  First sector (2048-468862127, default 2048):  Using default value 2048  Last sector, +sectors or +size{K,M,G} (2048-468862127, default 468862127):  Using default value 468862127  Partition 1 of type Linux and of size 223.6 GiB is set    Command (m for help): p                     \查看确认分区    Disk /dev/sdb: 240.1 GB, 240057409536 bytes, 468862128 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: 0x6511fa23       Device Boot      Start         End      Blocks   Id  System  /dev/sdb1            2048   468862127   234430040   83  Linux    Command (m for help): w                    \保存改分区  The partition table has been altered!    Calling ioctl() to re-read partition table.  Syncing disks.  

分区格式化

[root@localhost /]# mkfs             \tab 万能操作  mkfs         mkfs.btrfs   mkfs.cramfs  mkfs.ext2    mkfs.ext3    mkfs.ext4    mkfs.minix   mkfs.xfs  [root@localhost /]# mkfs.xfs /dev/sdb1         格式化sdb1  meta-data=/dev/sdb1              isize=256    agcount=4, agsize=14651878 blks           =                       sectsz=512   attr=2, projid32bit=1           =                       crc=0        finobt=0  data     =                       bsize=4096   blocks=58607510, imaxpct=25           =                       sunit=0      s/home"  挂载分区，找到uuid，写入fstab  
[root@localhost /]# blkid /dev/sdb1             查看sdb1 的uuid   写入fstab uuid 最稳定  /dev/sdb1 也可以  /dev/sdb1: UU TYPE="xfs"  [root@localhost /]# echo "/dev/sdb1: UU TYPE="xfs" " >> /etc/fstab  [root@localhost /]# vim /etc/fstab  -bash: vim: command not found    [root@localhost /]# vi /etc/fstab           写入fstab  [root@localhost /]# tail -n 2 /etc/fstab  ffbd4feb-c55e-40ca-86d3-c43919bd9060  /home xfs defaults 0 0  #/dev/sdb1 /home xfs defaults 0 0         \uuid 和 /dev/sdb1 区别？？  [root@localhost /]# mount -a                 重新读取配置文件  
检查挂载成果，挂载成功！！
[root@localhost /]# df -Th  Filesystem     Type      Size  Used Avail Use% Mounted on  /dev/sda3      xfs       215G  852M  215G   1% /  devtmpfs       devtmpfs  7.8G     0  7.8G   0% /dev  tmpfs          tmpfs     7.8G     0  7.8G   0% /dev/shm  tmpfs          tmpfs     7.8G  8.4M  7.8G   1% /run  tmpfs          tmpfs     7.8G     0  7.8G   0% /sys/fs/cgroup  /dev/sda1      xfs       497M  119M  378M  24% /boot  tmpfs          tmpfs     1.6G     0  1.6G   0% /run/user/0  /dev/sdb1      xfs       224G   33M  224G   1% /home    [root@localhost /]# lsblk  NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT  sda      8:0    0 223.6G  0 disk  ├─sda1   8:1    0   500M  0 part /boot  ├─sda2   8:2    0     8G  0 part [SWAP]  └─sda3   8:3    0 215.1G  0 part /  sdb      8:16   0 223.6G  0 disk  └─sdb1   8:17   0 223.6G  0 part /home  
ok，收工！！
PS：菜鸟级教程，新手复习，老鸟勿喷！如果这些你都看不懂的话，真的要恶补了！！！

本文原创地址：https://www.linuxprobe.com/linux-mount-disk.html作者：陶武杰，审核员：冯振华
本文原创地址：https://www.linuxprobe.com/linux-mount-disk.html编辑：public，审核员：暂无