It was just a matter of time until google was marginalised anyway. I'm afraid this will be forgotten in China very quickly. Still, it...
1 hour 22 minutes ago by robinsmith on Report: Google to leave China on April 10ZDNet is available in the following editions:
Vincent Danen shows you how to make quick backups on Linux systems with the mt-st suite of tools.
Most tape drives use a SCSI interface, which means that nearly every tape drive available will work out of the box on any Linux system using nothing more than the mt-st suite of tools. These tools are provided with most Linux distributions and are very easy to use. Using mt-st and tar with a tape drive provides you all of the tools required to make a quality backup.
If the driver for your SCSI interface card is loaded, perusing the dmesg output will show you what SCSI devices are attached and what device nodes they are assigned to. Typically, a tape drive will be assigned /dev/st0.
The mt program in the mt-st suite is used to manipulate the tape drive and the tape inside it. To erase a tape use:
# mt -f /dev/st0 erase
The typical syntax for mt is mt [-f device] [command] so you would use the following to rewind a tape:
# mt -f /dev/st0 rewind
The mt manpage has a lot more information on all of the available commands. To actually back data up onto the tape, use tar. Tar can write to devices as well as files:
# tar cvplf /dev/st0 / /usr/local
The line above will back up the / and /usr/local filesystems. Using the "l" option for tar tells it not to back up directories that exist on other filesystems, so if you only specified / and /usr/local was on a separate partition, it would not be backed up (thus the additional specification).
The time it takes to back up the system will depend entirely upon the size of what you are backing up and the speed of your tape drive.
To extract data, use tar again:
# mkdir /restore
# cd /restore
# tar xvpf /dev/st0
That would restore everything on the tape into the /restore directory. To extract a single file from the archive:
# tar xvpf /dev/st0 etc/fstab
That would restore only the /etc/fstab file from the tape.
As you can see, working with a tape drive is no more difficult than working with and creating local tar archives, which makes it flexible, scriptable, and easy to manipulate.
It was just a matter of time until google was marginalised anyway. I'm afraid this will be forgotten in China very quickly. Still, it...
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Proactol
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