In this Post we will see how to take backup and restore From backup in linux ! COntinue Reading !!
2. To list all files in an archive file,
3. If you want to verify that the backup made can be reinstated as once the data has been removed, you cannot restore the backup.
To check if your backup process is working adequately, use –compare (-d) option
4. If your backup requires more than one tape, you are required to use the –multi-volume (-M ) option
5. Incremental dumps are dependent on time stamps, the results could be flimsy when you change a file’s time stamps during dumping, or if you set the clock in reverse.
6. You must ensure that the order in which you are taking out incremental backup as GNU tar attempts to reinstate the correct state of the file system when the archive was formed. Therefore, it will remove the file that did not exist when the archive was formed.
7. Backup over a Network
- In Receiving Computer, Setup netcat and enter:
The choice of port is completely up to the user, provided it is 1024 or larger
- In Sending Computer, enter
# tar -cvpz/ | nc -q 0 1024
Inreinstate the name of the computer on the network.
(b) Using SSH
# tar -cvpz/ | ssh "( cat > ssh_backup.tar.gz )"
ssh_backup.tar.gz refers to the name of the file that will be created on the indicated machine.
– Should be reinstated with the name of the computer on the network.
8. Restore over a Network
Receiving Computer
# nc -l 1024 | tar -xvpjf - -C /mnt/disk
You are required to mount the disk before implementing this command.
Sending Computer
# cat backup.tar.gz | nc -q 0 1024
# tar -tvf archive.tar
3. If you want to verify that the backup made can be reinstated as once the data has been removed, you cannot restore the backup.
To check if your backup process is working adequately, use –compare (-d) option
# tar --compare --verbose -f backup.tar.gz
4. If your backup requires more than one tape, you are required to use the –multi-volume (-M ) option
# tar -cMF /dev/fd0H1440 /home/rabi/
5. Incremental dumps are dependent on time stamps, the results could be flimsy when you change a file’s time stamps during dumping, or if you set the clock in reverse.
6. You must ensure that the order in which you are taking out incremental backup as GNU tar attempts to reinstate the correct state of the file system when the archive was formed. Therefore, it will remove the file that did not exist when the archive was formed.
7. Backup over a Network
(a) Using Netcat
- In Receiving Computer, Setup netcat and enter:
# nc –l 1024 > backup.tar.gz
The choice of port is completely up to the user, provided it is 1024 or larger
- In Sending Computer, enter
# tar -cvpz
In
(b) Using SSH
# tar -cvpz
ssh_backup.tar.gz refers to the name of the file that will be created on the indicated machine.
8. Restore over a Network
Receiving Computer
# nc -l 1024 | tar -xvpjf - -C /mnt/disk
You are required to mount the disk before implementing this command.
Sending Computer
# cat backup.tar.gz | nc -q 0 1024