红色为您要键入的指令,绿色为需要注意的内容,蓝色为说明
特别提醒:删除分区后一定要先建立分区再保存,删除后点了保存会导致数据丢失。该操作有风险,为避免误操作导致数据丢失,操作前请对您的重要数据进行备份! 以下操作仅适用于centos6.x ,若是是使用的centos7.x 版本请使用fdisk工具完成,操作流程一致。
Centos:
[root@ebs ~]#yum -y install gdisk //安装分区工具 [root@ebs ~]#gdisk /dev/vda //操作根分区磁盘 Command (? for help): p //查看分区 Disk /dev/vda: 104857600 sectors, 50.0 GiB Logical sector size: 512 bytes Disk identifier (GUID): B7172F0B-2C30-4535-981D-F0ED8B4A6065 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 104857566 Partitions will be aligned on 2048-sector boundaries Total free space is 41945021 sectors (20.0 GiB)
Number Start (sector) End (sector) Size Code Name 1 2048 62914559 30.0 GiB 8300 Linux filesystem //注意这个值 Command (? for help): d //删除分区 Using 1
Command (? for help): 1 b back up GPT data to a file c change a partition's name d delete a partition i show detailed information on a partition l list known partition types n add a new partition o create a new empty GUID partition table (GPT) p print the partition table q quit without saving changes r recovery and transformation options (experts only) s sort partitions t change a partition's type code v verify disk w write table to disk and exit x extra functionality (experts only) ? print this menu
Command (? for help): n Partition number (1-128, default 1): 1 First sector (34-104857566, default = 2048) or {+-}size{KMGTP}: 2048 //刚才记录的 Last sector (2048-104857566, default = 104857566) or {+-}size{KMGTP}: //直接回车 Current type is 'Linux filesystem' Hex code or GUID (L to show codes, Enter = 8300): //直接回车 Changed type of partition to 'Linux filesystem'
Command (? for help): w
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!!
Do you want to proceed? (Y/N): y OK; writing new GUID partition table (GPT) to /dev/vda. Warning: The kernel is still using the old partition table. The new table will be used at the next reboot. The operation has completed successfully.
[root@ebs ~]#reboot //重启让分区生效 [root@ebs ~]#resize2fs -f /dev/vda1 //开始扩容根分区 resize2fs -f /dev/vda1 resize2fs 1.41.12 (17-May-2010) Filesystem at /dev/vda1 is mounted on /; on-line resizing required old desc_blocks = 2, new_desc_blocks = 4 Performing an on-line resize of /dev/vda1 to 13106939 (4k) blocks. The filesystem on /dev/vda1 is now 13106939 blocks long.
[root@ebs ~]#df -vh //完成,查看新的根分区大小
原文地址https://www.west.cn/faq/list.asp?unid=905
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