Precondition ：VMware Player 中安装的Fedora 17 Linux 32bit，个人较久远的测试环境，安装时没有进行磁盘规划，默认20G空间（动态调整），安装在根/下。
Background ：在上述环境中安装IBM DB2 Express-C 10.5（v10.5fp1_linuxia32_expc.tar.gz），安装时/tmp空间不足，无法安装。
Plan：需要进行磁盘扩容。考虑到使用VMware Player虚拟机。
1.首先调整虚拟机大小：
2.虚拟机开机，使用fdisk 命令新建新区 fdisk /dev/sda 添加 /dev/sda3
3.接下来就贴代码了：
Fedora release 17 (Beefy Miracle) Kernel 3.4.0-1.fc17.i686 on an i686 (0) [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on rootfs 6.5G 6.0G 529M 92% / devtmpfs 494M 0 494M 0% /dev tmpfs 502M 0 502M 0% /dev/shm tmpfs 502M 940K 502M 1% /run /dev/mapper/vg-lv_root 6.5G 6.0G 529M 92% / tmpfs 502M 0 502M 0% /sys/fs/cgroup tmpfs 502M 0 502M 0% /media /dev/sda1 497M 81M 392M 17% /boot [root@localhost ~]# # fdisk /dev/sda [root@localhost ~]# fdisk -l Disk /dev/sda: 32.2 GB, 32212254720 bytes 255 heads, 63 sectors/track, 3916 cylinders, total 62914560 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: 0x00002255 Device Boot Start End Blocks Id System /dev/sda1 * 2048 1026047 512000 83 Linux /dev/sda2 1026048 16777215 7875584 8e Linux LVM /dev/sda3 16777216 62914559 23068672 83 Linux Disk /dev/mapper/vg-lv_swap: 1073 MB, 1073741824 bytes 255 heads, 63 sectors/track, 130 cylinders, total 2097152 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/mapper/vg-lv_root: 6979 MB, 6979321856 bytes 255 heads, 63 sectors/track, 848 cylinders, total 13631488 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 [root@localhost ~]# pvcreate /dev/sda3 Writing physical volume data to disk "/dev/sda3" Physical volume "/dev/sda3" successfully created [root@localhost ~]# vgextend /dev/mapper/vg /dev/sda3 Volume group "vg" successfully extended [root@localhost ~]# lvextend -L +20G /dev/mapper/vg-lv_root Extending logical volume lv_root to 26.50 GiB Logical volume lv_root successfully resized [root@localhost ~]# resize2fs /dev/mapper/vg-lv_root resize2fs 1.42 (29-Nov-2011) Filesystem at /dev/mapper/vg-lv_root is mounted on /; on-line resizing required old_desc_blocks = 1, new_desc_blocks = 2 The filesystem on /dev/mapper/vg-lv_root is now 6946816 blocks long. [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on rootfs 27G 6.2G 21G 24% / devtmpfs 494M 0 494M 0% /dev tmpfs 502M 0 502M 0% /dev/shm tmpfs 502M 956K 502M 1% /run /dev/mapper/vg-lv_root 27G 6.2G 21G 24% / tmpfs 502M 0 502M 0% /sys/fs/cgroup tmpfs 502M 0 502M 0% /media /dev/sda1 497M 81M 392M 17% /boot [root@localhost ~]#
至此，操作结束，空间调整为30GB，满足使用需求。当然，此方案针对虚拟机中已安装的没有采用LVM的linux分区大小调整，其它不必参考此方案。