更多精彩请关注公众号：蓝色先驱
租了个烂服务器，Root密码无论怎么重置都是错的。写邮件给服务商不回，打电话打不通。
只有rescue模式能进去。。。
可是rescue模式我给装了Debian10好歹也能用啊。
之前试过chroot到主硬盘改密码，不行。
不得已，拆了主系统的空间给rescue模式用。
这个vps是我生日时买的。说送自己个生日礼物。今年生日，没有蛋糕没有聚会。也不敢办聚会。没了聚会也没人记得我生日。生日也没和刚在一起不久的新欢说，总觉得刚在一起不久就让人家花钱不好。这个vps便宜是真的便宜。50来块钱1年。可是面板密码是错的。重置还是错的。重装系统还是错的。联系客服总是遮遮掩掩，没有重点，客服电话打不通，只能发邮件，一天一回复，保证回的是没用的内容。仿佛我交了个笔友。近来太穷，没什么生意，又不好意思去吃软饭。小鸡也是肉啊。一鼓作气把只有rescue模式的小鸡搞好了，大不了以后就只用rescue呗。
探索
先看看硬盘df -h,有两块硬盘。没法直接全扩到根分区去。
Disk /dev/vda: 10 GiB, 10737418240 bytes, 20971520 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
Disklabel type: dos
Disk identifier: 0x4cd40c9a
Device Boot Start End Sectors Size Id Type
/dev/vda1 * 2048 19920511 19918464 9.5G 83 Linux
/dev/vda2 19920512 20969087 1048576 512M 82 Linux swap / Solaris
Disk /dev/vdb: 1.1 GiB, 1181115904 bytes, 2306867 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
Disklabel type: dos
Disk identifier: 0xb52fd1c0
用parted分区
rescue模式用的是/dev/vdb。
下来拆分了/dev/vda，好让我能在rescue模式下舒服一点点
parted /dev/sda
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 10.7GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
1 1049kB 10.2GB 10.2GB primary ext3 boot
2 10.2GB 10.7GB 537MB primary linux-swap(v1)
下面移除分区1，开始分区mkpart primary可以创建新的主分区。start最好与上一分区的end差一点，不然可能出错。
(parted) rm 1
(parted) print
Model: Virtio Block Device (virtblk)
Disk /dev/vda: 10.7GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags:
Number Start End Size Type File system Flags
2 10.2GB 10.7GB 537MB primary linux-swap(v1)
(parted) mkpart primary
File system type? [ext2]? ext4
Start? 2
End? 4096
(parted) mkpart primary
File system type? [ext2]? ext4
Start? 4097
End? 8193
(parted) mkpart primary
File system type? [ext2]? ext4
Start? 8194
End? 9728
(parted) quit
Information: You may need to update /etc/fstab.
现在看看分区情况
rescue # fdisk -l
Disk /dev/vda: 10 GiB, 10737418240 bytes, 20971520 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
Disklabel type: dos
Disk identifier: 0x4cd40c9a
Device Boot Start End Sectors Size Id Type
/dev/vda1 4096 7999487 7995392 3.8G 83 Linux
/dev/vda2 19920512 20969087 1048576 512M 82 Linux swap / Solaris
/dev/vda3 8001536 16001023 7999488 3.8G 83 Linux
/dev/vda4 16003072 18999295 2996224 1.4G 83 Linux
Partition table entries are not in disk order.
Disk /dev/vdb: 1.1 GiB, 1181115904 bytes, 2306867 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
Disklabel type: dos
Disk identifier: 0xb52fd1c0
Device Boot Start End Sectors Size Id Type
/dev/vdb1 * 2048 2304511 2302464 1.1G 83 Linux
用mkfs格式化分区 -t 文件系统格式 分区
rescue # mkfs -t ext4 /dev/vda1
mke2fs 1.44.5 (15-Dec-2018)
Creating filesystem with 999424 4k blocks and 249984 inodes
Filesystem UUID: 1a34e155-0e57-45cc-9074-24a553772500
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736
Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done
rescue # mkfs -t ext4 /dev/vda3
mke2fs 1.44.5 (15-Dec-2018)
Creating filesystem with 999936 4k blocks and 249984 inodes
Filesystem UUID: 987ca10e-0bb0-45fb-8a27-57e0a44bb88f
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736
Allocating group tables: done
Writing inode tables: done
Creating journal (16384 blocks): done
Writing superblocks and filesystem accounting information: done
rescue # mkfs -t ext4 /dev/vda4
mke2fs 1.44.5 (15-Dec-2018)
Creating filesystem with 374528 4k blocks and 93696 inodes
Filesystem UUID: 6819294e-8b71-4af6-8620-a3b63c078953
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
数据迁移及删除原空间文件
在mnt创建三个文件夹
rescue # cd /mnt
rescue # mkdir usr home var
rescue # ls
home usr var
#挂载分区并拷贝数据
rescue # mount /dev/vda1 /mnt/usr&&cp -a /usr/* /mnt/usr/
rescue # mount /dev/vda3 /mnt/home&&cp -a /home/* /mnt/home/
rescue # mount /dev/vda4 /mnt/var&&cp -a /var/* /mnt/var/
#删除这些数据，毕竟寸土寸金
rescue # rm -rf /usr/*
rescue # rm -rf /home/*
rescue # rm -rf /var/*
#卸载全部分区
rescue # umount /dev/vda1
rescue # umount /dev/vda3
rescue # umount /dev/vda4
检查检查是不是全卸载了
rescue # df -h
Filesystem Size Used Avail Use% Mounted on
udev 109M 0 109M 0% /dev
tmpfs 25M 3.0M 22M 13% /run
/dev/vdb1 1.1G 320M 715M 31% /
tmpfs 121M 0 121M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 121M 0 121M 0% /sys/fs/cgroup
tmpfs 25M 0 25M 0% /run/user/0
/dev/vda3 3.7G 16M 3.5G 1% /mnt/var
自动挂载分区nano /etc/fstab
- 分区位置
- 挂载点
- 文件系统格式
- 默认
- 0 0表示不需要开机进行检查
#/dev/vda1 / ext3 discard,errors=remount-ro 0 1
/dev/vda1 /usr ext4 defaults 0 0
/dev/vda3 /home ext4 defaults 0 0
/dev/vda4 /var ext4 defaults 0 0
最后挂载mount -a
检查一下。
rescue # df -h
Filesystem Size Used Avail Use% Mounted on
udev 109M 0 109M 0% /dev
tmpfs 25M 2.9M 22M 13% /run
/dev/vdb1 1.1G 988M 47M 96% /
tmpfs 121M 0 121M 0% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 121M 0 121M 0% /sys/fs/cgroup
tmpfs 25M 0 25M 0% /run/user/0
/dev/vda1 3.7G 16M 3.5G 1% /usr
/dev/vda3 3.7G 16M 3.5G 1% /home
/dev/vda4 1.4G 4.3M 1.3G 1% /var
大功告成了，更多精彩请关注公众号：蓝色先驱
接各种网站小程序开发，如有意介绍生意，有红包，具体电话谈。
微信: hero141to