General :: Bash Script For Doing Tape Backups - Need Root Password

Feb 14, 2011

I have a bash script that I am using for doing tape backups. The meat of the bash script is
sudo tar --totals -H pax -cvf /dev/st0 *
This all works just fine.

But of course tape functions have to be ran as root, therefore sudo, requiring the standard user to enter the root password. I would like to be in a situation where the standard user does not need (does not know) the root password. I think my solution is add that standard user.
User named dog to the sudo list.

I have reviewed the sudo man page and looked at [URL]. I am still fuzzy.
1- Will adding user 'dog' to this sudo list do what I expect meaning I can run:
sudo tar --totals -H pax -cvf /dev/st0 *
and the user is not queried for the root password
2- How do I do that? and do I make a cmd alais for only: "tar --totals -H pax -cvf /dev/st0 *"
My distro is OpenSuse.

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How do you get Rsync to do incremental backups rather than full backups? At the moment I have a script that will create a backup folder (if it doesnt already exist) then copy the source files into the backup directory with the command

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I need backup files to a tape drive on a remote server without being prompted for password.

I got the part working to tar files to the remote tape drive like this:

Code:

currently I got rsync to work with out being prompted for password like this:

Code:

How can I get the above tar command to work like the rsync command so it does not prompt me for a password.

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I have been using an LTO-5 Ultrium-3000 tape drive connected to an ATTO HBA without problem. I can control the tape drive using "mt -f /dev/nst0" and have been able to make successful backups using cpio, tar, and dump/restore. I followed some instructions on the web about how to install the HPE Library and Tape Tools application (version 4.21) which relies on conversion of a rpm to a deb file. The software seems to have been installed correctly and runs. However the hardware scan function does not recognize my tape drive. The following is suggested in the user manual if the tape device is not recognized by the software under Linux:

1. Login as root.
2. Edit the following file:
vi /etc/modules.conf
3. Add the following line as appropriate:
add options scsi_mod max_scsi_luns=128
4. Reboot the computer.

The problem is I don't have an /etc/modules.conf and am not sure exactly which file would be equivalent? If this is even the correct solution.

My tape drive is controllable and functions well using "mt -f /dev/nst0 status" so it seems to be a matter of LT&T software to detect the tape drive.

At the risk of providing too much info here some, possibly relevant, output from lshw

*-pci:3
description: PCI bridge
product: 6 Series/C200 Series Chipset Family PCI Express Root Port 1
vendor: Intel Corporation
physical id: 1c
bus info: pci@0000:00:1c.0
version: b5

[Code] .....

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I need to login as root, or at least get root privileges, in a cron triggered backup run. The straight way to do this would be the backup server making an ssh connection to the server to be backed up (this way because I want to avoid many servers being backed up in parallel and the backup server itself would be managing this diversity), via the rsync command which would be performing the backup's synchronization step.

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i tried to do a listing of the contents backedup on tape and it got struck in middle throwing below error,

/dev/st0:device input/output error. after which i was unable to eject the tape using
mt -f /dev/st0 rewoffl

i removed the tape by holding the eject button and now when i try to insert another tape, it's unable to take the tape in to tape drive...

I've tried doing all except reeboting the server, can any one help me out in this issue, hope the blow information may help in debugging the issue... code....

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Code:
#!/bin/bash
echo
echo
echo "Automate Backups"
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read answer1
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then
if [$USER = "root"]
then
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fi
echo
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uses: HTPC, Network Storage, VMWare server host: SMTP, FTP server, and Web server virtual machines

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[code]....

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