SIMPLE INCREMENTAL BACKUP USING rsync COMMAND

Backups  can be classified to two types.They are

1)Full backup
The entire data will be backup will be taken every time

2)Incremental backup

Incremental backup take the full backup at the first time ,from the second time it will compare the files in first backup and the files in the directory which backup to be taken and only copy the modified files .



rsync

The rsync utility allows you to copyfrom local sysstem to a remote system or copy between two local directories .If the files exist in the destination directory ,rsync only copy the differences in the file,this property of rsync make it ideal for incremental backup

here is the syntax for rsync

rsync [options] [source folder] [Destination]

Example

rsync -azv /etc/sysconfig /backup/

In the above example the entire sysconfig directory will be copied to /backup folder when firsttime we run this command ,from second time onwards rsync checks the files in folder /backup with /etc/sysconfig and only copy the differnce in sysconfig file to /backup folder

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CONFIGURING PXE BOOT SERVER FOR INSTALLING LINUX WITHOUT CD OR OTHER MEDIA

FOR INSTALLING LINUX WITHOUT ANY CD OR OTHER MEDIA WE HAVE TO SETUP A PXE SERVER.PXE STANDS FOR PREBOOT EXECUTION ENVIRONMENT WHICH ALLOWS YOU TO BOOT DIRECTLY FROM YOUR PXE SERVER AND ACCESS THE DATA FROM PXE SERVER FOR FURTHER INSTALLATION.YOU CAN ALSO USE KICKSTART TO FILE TO INSTALL FOR FULLY AUTOMATED INSTALLATION.


REQUIREMENTS

1) CENTOS SERVER (CAN BE RHEL OR OTHER DISTRO)
2)CLIENT WITH A NIC SUPPORTS PXE

STEPS OF PXE SERVER INSTALLATION

1) INSTALLING PACKAGES REQUIRED FOR PXE SERVER
2)CONFIGURING DHCP SERVER FOR PXE SERVER
3) TFTP CONFIGURATION FOR PXE
4)VSFTP CONFIGURATION FOR PXE SERVER
5)PXE SERVER CONFIGURATION

PLEASE FOLLOW THE STEPS IN THE VIDEO FOR FURTHER REFERENCE

SERVER CONFIGURATION

CLIENT SIDE CONFIGURATION

THANKS IF ANY DOUBTS KEEP YOUR COMMENTS

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