Linux系统下扩展磁盘空间

淡淡的烟草味﹌ 2023-10-03 15:33 30阅读 0赞

首先关闭Linux系统 ，打开“虚拟机设置”，点击“硬盘”，并对现有硬盘进行“扩展”；

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16][]

完成扩展之后，打开虚拟机，使用root用户，执行：fdisk -l命令，可以查看扩展后的结果。

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 1][]从主磁盘空间中创建新的分区，执行：fdisk /dev/sda 然后按照箭头顺序依次执行（最后W保存）

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 2][]

检查是否创建成，执行命令： fdisk -l

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 3][]

完成了上述步骤后，请系统进行重启，重启后才能继续往下走 init 6  
重启后依然root登陆

格式化新的分区，执行：mkfs.ext3 /dev/sda3

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 4][]

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 5][] 进入lvm管理，执行pvcreate /dev/sda3

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 6][]

lvm中执行命令：pvdisplay查看物理卷轴情况，注意VGName

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 7][]

将初始化过的分区加入虚拟卷组，执行命令： lvm>vgextend centos /dev/sda3

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 8][]

查看磁盘，sda3成功添加

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 9][]

![watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBARGFuZGkwNzA3_size_20_color_FFFFFF_t_70_g_se_x_16 10][] 扩展已有的卷的容量 lvm> lvextend-L +20G /dev/mapper/centos-root

fdisk -l，查看扩展卷是否成功添加。

执行df -h系统添加并没有成功，需执行xfs\_growfs /dev/mapper/centos-root 拉伸文件系统。

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