Linux site Timing automatic backup wget, SSH, SCP method summary

The first type of wget direct download: Run the CRONTAB-E command on the remote server to add a timed task

7 * * * * cd/home/backup/&&wget http://Source server ip/xxx_$ (date +%y%m%d). tar.gz

(Automatically download to backup directory at 7:30 every day)

Using the SCP command backup requires that you first set up the SSH key login

Suppose that there are two Linux servers A and B, when a connection B does not need to enter a password, the implementation of a VPS on the use of the Ssh-keygen command to generate a pair of public key, the specific operation is as follows:

In a server operation:

Running: ssh-keygen-t RSA three times enter
Generates public key id_rsa.pub and private key Id_rsa, which are stored by default in the/root/.ssh/directory

Operating on the B server:

Upload a public key id_rsa.pub copy to the B server/root/.ssh/directory
PS: No. The SSH directory can be placed in another directory or create one: mkdir. SSH

Create one more: Touch/root/.ssh/authorized_keys
chmod 700/root/.ssh

Continue to operate on the B server:

Run:

Cat ~/.ssh/id_rsa.pub >> ~/.ssh/authorized_keys
chmod 600/root/.ssh/authorized_keys

Reboot SSH after setting

CentOS Restart Ssh:service sshd restart

Debian reboot Ssh:service ssh restart

CentOS execution on a server: SSH root@b server ip-p port

Debian execution: ssh-l root b server Ip-p 22

See if you can login with a different password direct key. Exit Command: Exit

Second SCP commandThe specified directory to upload to the backup server on a local timer

Run the CRONTAB-E command on the local VPS to add timed tasks

7 * * * scp-p 22/home/www/zxsdw_$ (date + ' \%y\%m\%d ') tar.gz root@ remote server

(-P 22 refers to the port on which the backup server SSH is open and can be set itself.) Data in the local WWW directory is backed up to the back directory of the remote server

7 * * * * scp-p 22-r/home/www/zxsdw root@ remote server ip:/home/back/

(Zxsdw This folder to the back directory of the remote server)

Third Kind of SCP commandTimed downloads to the specified directory of the server

Run the CRONTAB-E command on a remote VPS to add a timed task

0 7 * * * * scp-p root@ data is located on the VPS ip:/home/www/zxsdw_$ (date + ' \%y\%m\%d '). tar.gz/home/back/
(Download the data from the source server www to the back directory of the backup server)

Because the WGET,SSH,SCP command supports backing up to a remote server, a single command can be executed.