Courseware: TAR project actual combat case

Courseware: TAR project Actual case:

= = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =

[root@localhost ~]# yum -y install mariadb-server

[root@localhost ~]# systemctl start mariadb

[root@localhost ~]# mkdir /backup

Example 1: Physical backup and restoration of mysql

[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 /

Example 2: Physical backup and restoration of mysql

[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

Case 3: host A /etc ——–> host A/TMP

[root@localhost ~]# tar -czf etc.gz /etc -C /tmp

Case 4: host A /etc ——–> host B/TMP

General method:

[root@localhost ~]# SCP -r /etc 172.16.20.21:/ TMP

Suggested methods:

==host B’s listening port ==

[root@w_hat ~]# firewall-cmd –permanent –add-port=8888/tcp

[root@w_hat ~]# firewall-cmd –reload

or

[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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