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# Searchable Keywords: tar backup dump ssh rsh tape mt rmt

  Various ways to backup files and directories
  using secure protocols and not so secure but
  using either tar or dump commands



<<<<<<<<<<<<<<<< tar -  Using ssh/rsh to remote tape drive - backup >>>>>>>>>>>>>>

http://w3.trib.com/~ccurley/OpenSSH.html

Backing up over SSH

To back up to another computer over SSH:

To compress on the machine originating the backup:

root@charlesc # tar -cf - directory.to.be.tarred | bzip2 | ssh server "cat > test.tar.bz2"

To compress on the target:

root@charlesc # tar -cf - directory.to.be.tarred | ssh server "bzip2 > test.tar.bz2"

where server is the name of the target computer.


## This worked to stat the remote tape drive. #####
	ssh keys were exchange before hand.
	
#> ssh -v abby \ mt -f /dev/st0 status     	( The mt command stands for "Magnetic Tape Control 
						available on Solaris on Linux you may need to install
						it. Last I looked it was called mt-st also for remote
						tape drives rmt. )


    #!/bin/bash                                                                                   
    # Backup from Leon to Tony                                                                    

    cd /

    list="home/www home/www2 etc var"

    for file in $list
    do
    #Keep the previous backup                                                                     
     tgz=`echo $file | sed -e 's/\//_/g'`;
     old="${tgz}.old";
     #Store the old backup                                                                         
     ssh tony "mv -f /home/backup/leon/$tgz /home/backup/leon/$old";
     #Tony is a i486... be patient !                                                               
     sleep 5m
     #THE ligne that makes everything                                                              
     tar -cz $file/* | ssh tony "cat - > /home/backup/leon/$tgz";
     sleep 5m
    done

Use remote or secure shell commands, tar, and dd from your local machine: 

    tar zcBbvf 20 - . | ssh vagabond 'dd of=/dev/rmt/0ln bs=20b'
    
    This  have worked !!!!!!!!!!!!!
    tar cvf - ./Styx-backup | ssh abby 'dd of=/dev/st0 bs=512b'
 
     Maybe ???? Keeps erroring out (i/o error)
    dump 0f - /data2 | ssh abby 'dd of=/dev/st0 bs=512b'
    
 
 
 	using ssh to tar and dump
 
Here is how I took a tar backup of a solaris server, to
a linux box, some time ago:
tar cf - source | ssh -l username backup_server 'cat > destination.tar' If you
 wanted to send it straight to 
the tape, you could do this:
tar cf - source | ssh -l username lnx 'dd of=/dev/st0' If you wanted to do a 
dump, instead of tar:
ufsdump 0f - /dev/rdsk/c0t2d0s0 | ssh -l username lnx 'dd of=/dev/st0' You may
 want to give dd an appropriate block size, for your tape drive. > is there also
  a way of automating it all, i don't
  
  
 Something like:   backupbox# ssh target 'dump 0f - / | gzip -fast' | \
 		dd if=- of=/dev/nst0
 		
 tried:
 dump 0sf 95000 - / |ssh abby 'dd of=/dev/st0' <--bombed
 tar cf - / |ssh abby 'cat > /dev/st0'		<-- could tar root 
 dump 0sf 95000 - / |ssh abby 'cat > /dev/st0'
  rdump -0u -f abby:/dev/st0 /data2/Styx-backup <-- ahh No
 ssh abby \ dump -0u -f /dev/st0 .  <----trys to back up remote machine
 dump 0sf 95000 - /data2/Styx-backup | ssh abby /dev/st0  <-- bombed
 dump 0sf 95000 - /data2/Styx-backup |ssh abby 'dd of=/dev/st0 bs=512' <--maybenot
 
 
 		THIS IS THE ONE !
 dump 0sf 95000 - /data2/Styx-backup | ssh abby dd of=/dev/st0
 
 	USING NFS AND TAR TO BACKUP REMOTE HOSTS
 	each dat tape only holds 2gigs ?$#@%^&*
 [root@abby pingyD4]# for A in `ls |grep -v lost+found`
> do
> date                
> echo $A
> tar cvf /dev/nst0 $A
> echo
> sleep 1
> done

------------- Using rsh to backup to a remote host --------------

	# !!! Of course I still couldn't get tho to fit on one tape !!! #
	having a hard time addressing more then 64k from host to tape drive
	
- Make sure the remote tape host have open entris for rsh,rlogin,rexec,shell
  in the /etc/ined.conf file......then HUP inetd
- If your using tcpwrappers make sure there is an open entry for the host
  your sending data from on the remote hosts /etc/hosts.allow file
- Make sure there is an entry for the sending host on the remote tape hosts
  /.rhosts file. (otherwise a password WILLL be required)
  
dump syntax: dump 0sf 150000 abby:/dev/st0 /data3 -b 512
The -b for block size is optional but your mileage may vary.

tar syntax: tar cvf abby:/dev/st0 /data3 -b 512


#!!!!!!!!!!!!!!!!!!!! This worked !!!!!!!!!!!!!!!!!!!!!!!!!!!!#

pingy is the file server to back up, abby is the tape drive host

To backup:
Use the pingy:/root/bin/bkup_2tape.sh script, but use it for a directory
level. Not a full partition.That way you fit it on one tape


To restore(on the remote hosts, in this case pingy):
Use /sbin/retsore if abby:/dev/st0

#!!!!!!!!!!!!!!!!!!!! This worked !!!!!!!!!!!!!!!!!!!!!!!!!!!!#

  #------------------------------------------------------------------#

See also dumpcmd, Solaris notes for more tar and dump options