timeshift 支持ubuntu ，debian系统
安装timeshift
sudo apt-add-repository -y ppa:teejee2008/ppasudo
apt-get updatesudo
apt-get install timeshift
安装报错ValueError: SSL support not available
处理方法：安装ssl
sudo apt-get install openssl
sudo apt-get install libssl-dev
命令行详解：
Syntax:timeshift --check
timeshift --create [OPTIONS]
timeshift --restore [OPTIONS]
timeshift --delete-[all] [OPTIONS]
timeshift --list-{snapshots|devices} [OPTIONS]
Options:
List:
--list[-snapshots] List snapshots
--list-devices List devices
Backup:
--check Create snapshot if scheduled
--create Create snapshot (even if not scheduled)
--comments <string> Set snapshot description
--tags {O,B,H,D,W,M} Add tags to snapshot (default: O)
Restore:
--restore Restore snapshot
--clone Clone current system
--snapshot <name> Specify snapshot to restore
--target[-device] <device> Specify target device
--grub[-device] <device> Specify device for installing GRUB2 bootloader
--skip-grub Skip GRUB2 reinstall
Delete:
--delete Delete snapshot
--delete-all Delete all snapshots
创建实列：
root@ubuntu:~# timeshift --create
Select backup device:
Num Device Size Type Label
------------------------------------------------------------------------------
0 > /dev/sda1 20.0 GB ext4
1 > /dev/sdb1 21.0 GB ext4 #提前准备好一个ext4的盘，作为备份盘
Enter device name or number (a=Abort): 1
------------------------------------------------------------------------------
Estimating system size...
Creating new snapshot...(RSYNC)
Saving to device: /dev/sdb1, mounted at path: /mnt/nfs
Synching files with rsync...
Created control file: /mnt/nfs/timeshift/snapshots/2021-04-21_02-21-42/info.json
RSYNC Snapshot saved successfully (231s)
Tagged snapshot '2021-04-21_02-21-42': ondemand
------------------------------------------------------------------------------
root@ubuntu:~#ls timeshift/snapshots/2021-04-21_02-21-42/localhost/
bin dev home lib media opt root sbin sys tmp var
boot etc initrd.img lib64 mnt proc run srv timeshift usr vmlinuz
恢复实例：
#timeshift --list
#timeshift --restore --snapshot ‘2021-04-21 02-21-42’
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