Linux Server Data Backup

Purpose: Periodically compress the data on server A and Server B to the C server

1. Choose Password-Free login

1.1 Execute under the root directory on A/b server, respectively:

SSH-KEYGEN-T RSA

--and then keep the ENTER key. Finally, the. ssh file is generated in the ~ directory, with three files in it.

Authorized_keys  Id_rsa  id_rsa.pub

Authorized_keys: The public key that stores the remote password-free login, which records the public key of multiple machines mainly through this file.

ID_RSA: Generated private key file

Id_rsa.pub: Generated Public key file

Know_hosts: List of known host public keys

which

Id_rsa.pub for the generated public key, copy it to the C server, authorized_keys,know_hosts on the new server without
1.2 respectively, the id_rsa.pub on a, B, through the SCP to C
A:

Scp-p-p< port > ~/.ssh/id_rsa.pub [Email protected]<remoteip>:/root/.ssh/a_rsa.pub

B:

Scp-p-p< port > ~/.ssh/id_rsa.pub [Email protected]<remoteip>:/root/.ssh/b_rsa.pub

The--SCP command,-p for the specified port, is not specified as the default 22 port.

Then append the sent file to Authorized_keys on the C server:

// Append Acat/root/.ssh/a_rsa.pub >>/root/.ssh/// append b

Verify success:

ssh-p< Ports > <remote>

To be able to go in means success.

2 Implementation of Backup scripts

2.1

Compress the file before backing it up, generate MD5, MD5 verify the C server, delete the corresponding md5,gz on server A after the file is consistent, and file 20 days ago

#!/bin/bash######### Cache ########### #local Filepathlocalpath=$1#topathtopath=$2#datedate=$ (Date +%y%m%d) FileName=*. Log#statusmdstatus=1#md5 localfile#md5sum ${localpath}${filename}> "${date}". MD5#CDCD"${localpath}"#tar localfiletar zcf ${filename}"-"${date}.tar.gz ${filename} #md5 local tarmd5sum ${filename}"-" ${date}.tar.gz > "${date}". MD5#SCPSCP-p1022 ${filename} "-" ${date}.tar.gz [email protected]<remoteip>: ${TOPATH}SCP-p1022 ${date}.md5 [Email protected]<remoteip>: ${topath} #sshmdstatus= ' SSH [email protected]<remoteip>-P 1022-TQ <<REMOTESSHCD"${topath}"md5sum-C--status ${date}.md5 echo $?exitremotessh ' #deleteif["${mdstatus}"-eq 0]; then echo"Success"Find ${localpath}-mtime +20-name "*.log"-exec RM-RF {} \; RM-RF ${localpath}*. GZ RM-RF ${localparh}*. Md5fi

3. Timed Task Execution Script

Crontab-e

Time-sharing week [order]

* * * * * * [Commond]

0 8 * * * [Script path]

Complete

Linux Server Data Backup