How do you make Entire file system backup in Ubuntu

1. first stop oracle if it is installed

2. find and cpio are the commands used to create backup tar file

Find list of files to be backed up and create archive

find command :
============
xdev : options tells only search in current file system . i.e ' / '
To omit paths in /tmp, /proc and /var/tmp we use prune option. we no need to take a backup of these temporary
files. use -prune option for that
-o options is like OR conidtion to add two are more prunes
-print options prints path

cpio command
===========
it creates and un-creates archived cpio files. And also is capable of copying files to things other than a hard disk.

-o options tells that "(copy out) : cpio -o reads the standard input to obtain a list of path names and copies those files onto the standard output."
-v : for verbose

switch to root user. $sudo su - (to get permissions to all files)

take relative path backup using following command.

find ./ -xdev
-path /tmp -prune -o
-path /proc -prune -o
-path /var/tmp -prune -o
-print | cpio -ov > /tmp/fullback.cpio

so the single line commad is

>find ./ -xdev -path /tmp -prune -o -path /proc -prune -o -path /var/tmp -prune -o -print | cpio -ov > /tmp/fullback.cpio

step 3: Now we can restart oracle

>/etc/init.d/dboracle start ( dboraz is a service to be exist)

Step 4: create message digest for archive file for security reasons. this is useful while
restoring backup. it used to check correctness of backup file before starting restore.

>md5 fullback.cpio > fullback.md5


Step 5: Now split big file into small pieces so that we can write them into a DVD (4.7 GB)


>split -d -b4096m fullback.cpio fullback [yields fullback00, fullback01, ... fullbackxx]

Step 6:

burn pieces fullbackxx to DVDs along with message digest file. fullback.md5