VMware 虚拟机给Ubuntu根分区扩容

用VMware安装了Ubuntu service 18.04 ，刚开始给了30G磁盘空间，使用发现空间不够了，想对磁盘进行扩容。但是直接在VMware点击扩展后发现Ubuntu容量并没有变化，原因是需要在Ubuntu里面进行处理：对分区进行合并。

1、改变虚拟磁盘大小

  • 关闭Ubuntu
  • 右键—>设置—>硬盘—->实用工具—>扩展
  • 填入扩展后的分区大小
  • 确定

2、查看磁盘使用情况

  • 开启Ubuntu

  • 输入：df -h

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    klein@klein:~$ df -h
    Filesystem      Size  Used Avail Use% Mounted on
    udev            955M     0  955M   0% /dev
    tmpfs           198M  1.3M  196M   1% /run
    /dev/sda2        30G   14G   15G  48% /
    tmpfs           986M     0  986M   0% /dev/shm
    tmpfs           5.0M     0  5.0M   0% /run/lock
    tmpfs           986M     0  986M   0% /sys/fs/cgroup
    /dev/loop0       98M   98M     0 100% /snap/core/10185
    /dev/loop1      205M  205M     0 100% /snap/microk8s/1710
    /dev/loop2       98M   98M     0 100% /snap/core/10126
    /dev/loop3      205M  205M     0 100% /snap/microk8s/1769
    tmpfs           198M     0  198M   0% /run/user/1000

3、在Ubuntu shell进行分区扩容操作

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klein@klein:~$ sudo fdisk /dev/sda

Welcome to fdisk (util-linux 2.31.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.

  • 打印查看分区划分情况

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    Command (m for help): p
    Disk /dev/sda: 40 GiB, 42949672960 bytes, 83886080 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: gpt
    Disk identifier: BB1002CF-D749-4A1F-8DF7-EF0945D4DF0E

    Device     Start      End  Sectors Size Type
    /dev/sda1   2048     4095     2048   1M BIOS boot
    /dev/sda2   4096 83886046 83881951  40G Linux filesystem

  • 删除需要扩容的分区，这里是2，完成后不要执行 w 写入

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    Command (m for help): d
    Partition number (1,2, default 2): 2


    Command (m for help): p
    Disk /dev/sda: 100 GiB, 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
    Disklabel type: gpt
    Disk identifier: 0976B291-839E-463D-BD05-936253587234

    Device     Start   End Sectors Size Type
    /dev/sda1   2048  4095    2048   1M BIOS boot

  • 创建新分区

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    # 创建新分区 ，First和Last sector直接回车默认值，因为我是把剩下所有空闲的空间全部分配到扩容的新分区内
    # 若是部分分配，请在Last sector输入对应的值
    Command (m for help): n
    Partition number (2-128, default 2):
    First sector (4096-209715166, default 4096):
    Last sector, +sectors or +size{K,M,G,T,P} (4096-209715166, default 209715166):

    Created a new partition 2 of type 'Linux filesystem' and of size 100 GiB.
    Partition '#2' contains a ext4 signature.

    # No
    Do you want to remove the signature? [Y]es/[N]o: n

  • 查看新分区

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    Command (m for help): p

    Disk /dev/sda: 100 GiB, 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
    Disklabel type: gpt
    Disk identifier: 0976B291-839E-463D-BD05-936253587234

    Device     Start       End   Sectors  Size Type
    /dev/sda1   2048      4095      2048    1M BIOS boot
    /dev/sda2   4096 209715166 209711071  100G Linux filesystem

  • 确认无误后 w 写入操作

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    Command (m for help): w

    The partition table has been altered.
    Syncing disks.

  • 需要重启

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    klein@klein:~$ sudo reboot

4、执行扩容操作

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# 执行扩容操作
klein@klein:~$ sudo resize2fs /dev/sda2