云计算学习路线教程大纲课件：tar项目实战案例：
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[root@localhost ~]# yum -y install mariadb-server
[root@localhost ~]# systemctl start mariadb
[root@localhost ~]# mkdir /backup
案例1：mysql物理备份及恢复
[root@localhost ~]# tar -cJf /backup/mysql.tar.xz /var/lib/mysql
[root@localhost ~]# rm -rf /var/lib/mysql/*
[root@localhost ~]# tar -xf /backup/mysql.tar.xz -C /
案例2：mysql物理备份及恢复
[root@localhost ~]# cd /var/lib/mysql
[root@localhost mysql]# tar -cJf /backup/mysql.tar.xz *
[root@localhost mysql]# tar -xf /backup/mysql.tar.xz -C /var/lib/mysql
案例3：host A /etc （海量小文件） ——–> host A /tmp
[root@localhost ~]# tar -czf etc.gz /etc -C /tmp
案例4：host A /etc （海量小文件） ——–> host B /tmp
常规方法：
[root@localhost ~]# scp -r /etc 172.16.20.21:/tmp
建议方法：
==host B 监听端口==
[root@w_hat ~]# firewall-cmd –permanent –add-port=8888/tcp
[root@w_hat ~]# firewall-cmd –reload
或
[root@hostb ~]# systemctl stop firewalld.service
[root@hostb ~]# nc -l 8888 |tar -xzf – -C /tmp
==host A ==
[root@localhost ~]# tar -czf – /etc | nc 172.16.20.21 8888
tar: Removing leading `/’ from member names
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