使用 df 和 fdisk 命令时，我看到的大小不同。请帮忙！
DF-H
Filesystem Size Used Avail Use% Mounted on
udev 16G 4.0K 16G 1% /dev
tmpfs 3.2G 820K 3.2G 1% /run
/dev/mapper/spar1--vg-root 9.7G 6.2G 3.1G 68% /
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 16G 0 16G 0% /run/shm
none 100M 0 100M 0% /run/user
/dev/sda1 236M 41M 183M 19% /boot
sudo fdisk -l
Disk /dev/sda: 292.3 GB, 292326211584 bytes
255 heads, 63 sectors/track, 35539 cylinders, total 570949632 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 identifier: 0x0009bd3a
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 499711 248832 83 Linux
/dev/sda2 501758 570947583 285222913 5 Extended
/dev/sda5 501760 570947583 285222912 8e Linux LVM
Disk /dev/mapper/spar1--vg-root: 54.5 GB, 54525952000 bytes
255 heads, 63 sectors/track, 6629 cylinders, total 106496000 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 identifier: 0x00000000
Disk /dev/mapper/spar1--vg-root doesn't contain a valid partition table
Disk /dev/mapper/spar1--vg-swap_1: 125.8 GB, 125829120000 bytes
255 heads, 63 sectors/track, 15297 cylinders, total 245760000 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 identifier: 0x00000000
Disk /dev/mapper/spar1--vg-swap_1 doesn't contain a valid partition table
答案1
调整分区大小您可以使用以下方法扩展逻辑卷：
sudo lvextend -L +5g foo/bar
这将为 foo 卷组中的 bar 逻辑卷添加 5 GB。您可以根据需要指定绝对大小，而不是相对大小，只需省略前导 + 即可。空间是从 bar 卷组中任何位置的可用空间分配的。如果您有多个物理卷，您可以将其中一个或多个的名称添加到命令末尾，以限制应使用哪些物理卷来满足请求。
扩展逻辑卷后，您需要扩展文件系统以使用新空间。对于 ext 3/4，您只需运行：
sudo resize2fs /dev/foo/bar