因為根目錄會包含很多系統應用運作的配置等，肯定不能直接解除安裝，是以要采用一種既不破壞資料，又能擴容的方法：
1.關機
2.設定->擴充磁盤容量
3.開機
[[email protected] ~]#df -hT-T 檔案系統Filesystem Type Size Used Avail Use% Mounted on/dev/sda2ext418G15G 2.6G85%/tmpfs tmpfs 491M 148K 491M 1% /dev/shm
/dev/sda1 ext4 291M 34M 242M 13% /boot
[[email protected] ~]#fdisk -l
Device Boot Start End Blocks Id System
/dev/sda1 * 1 39 307200 83 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda239 2358 1863168083Linux非LVM
[[email protected] ~]#fdisk /dev/sda
d删除分區
2删除/dev/sda2
n新增
p主分區
2新增/dev/sda2
回車預設
回車預設
w儲存
[[email protected] ~]#reboot
因為是ext4格式，用resize2fs
[root@localhost ~]#resize2fs /dev/sda2resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/sda2 is mounted on /; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 3
Performing an on-line resize of /dev/sda2 to 10407364 (4k) blocks.
The filesystem on /dev/sda2 is now 10407364 blocks long.
[[email protected] ~]#df -hTFilesystem Type Size Used Avail Use% Mounted on
/dev/sda2 ext4 40G 15G 24G38%/
tmpfs tmpfs 491M 80K 491M 1% /dev/shm
/dev/sda1 ext4 291M 34M 242M 13% /boot
.host:/ vmhgfs 921G 171G 751G 19% /mnt/hgfs
[r[email protected] ~]#lsblkNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 40G 0 disk
├─sda1 8:1 0 300M 0 part /boot
└─sda2 8:2 039.7G0 part /
由于sda2挂載在根目錄下，sda2是最後一個分區，是以新增的空間跟sda2是連續的，在最後選擇start和end的時候，就能連接配接上，這也是成功的一個條件