linux的备份和恢复

gslhelloworld

已于 2023-12-19 09:10:04 修改

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分类专栏：工具 linux 文章标签： linux

于 2020-08-24 20:28:14 首次发布

本文链接：https://blog.youkuaiyun.com/gsl371/article/details/108186470

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备份系统

如何备份linux系统呢？很简单，就像你备份或压缩其它东西一样，使用TAR。和Windows不同，Linux不会限制root访问任何东西，你可以把分区上的所有东西都扔到一个TAR文件里去！

搜集信息

版本信息

[root@localhost home]# cat /etc/redhat-release
CentOS Linux release 7.8.2003 (Core)
[root@localhost home]# uname -a
Linux localhost.localdomain 3.10.0-1127.10.1.el7.x86_64 #1 SMP Wed Jun 3 14:28:03 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux

查看位数

getconf LONG_BIT

查uuid

[root@localhost home]# blkid
/dev/sda1: UUID="878753cc-4796-445b-8803-5474dd11224e" TYPE="xfs"
/dev/sda2: UUID="GrKX0b-mcu5-YCbB-OceF-ljWQ-9BgO-efY51Y" TYPE="LVM2_member"
/dev/mapper/centos-root: UUID="e59ac327-9c57-49b2-a663-0c1194e366b0" TYPE="xfs"
/dev/mapper/centos-swap: UUID="ac14ffb9-4501-476d-9e43-ed4a00616655" TYPE="swap"
/dev/mapper/centos-home: UUID="c3091524-0e48-4bf4-a2c1-01d011d75733" TYPE="xfs"

磁盘信息


[root@localhost home]# fdisk -l

Disk /dev/sda: 1000.2 GB, 1000204886016 bytes, 1953525168 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disk label type: dos
Disk identifier: 0x00009674

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200  1953523711   975712256   8e  Linux LVM

Disk /dev/mapper/centos-root: 53.7 GB, 53687091200 bytes, 104857600 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/mapper/centos-swap: 8388 MB, 8388608000 bytes, 16384000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes


Disk /dev/mapper/centos-home: 937.0 GB, 937045262336 bytes, 1830166528 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes

[root@localhost home]# lsblk
NAME            MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda               8:0    0 931.5G  0 disk
├─sda1            8:1    0     1G  0 part /boot
└─sda2            8:2    0 930