Create a USB Key for Installing TufinOS On An Appliance

Overview

In order to install TufinOS on a Tufin appliance, you must boot from a USB key that has the TufinOS image on it.

Go to the Download Center and click the TufinOS 4.50 image file.
Select how you want to download the installation package: Download to Computer or Copy link (valid for 10m).

If you copied the link, run the following command within ten minutes:
```
curl -o [Name the file].run.gz  “<LINK>”
```
curl -o [Name the file].run.gz “<LINK>”
Where <LINK> is the link you copied from the Download Center.

Make sure the server can download from https://tosportaldownloads.tufin.com.
If you downloaded to the computer, copy the compressed file from your local computer to the server.
Extract the TufinOS run file from the archive.
```
[<ADMIN> ~]$ sudo tar xzvf TufinOS-X.XX-XXXXXX-x86_64-Final.usb.img.tgz
```
sudo tar xzvf TufinOS-X.XX-XXXXXX-x86_64-Final.usb.img.tgz
The run file name includes the release, version, and build number.

For example: TufinOS-4.50-4368238-x86_64-Final.usb.img

After extraction, you will have two files - the main .img file and a .sha256 checksum file.
Verify the integrity of the TufinOS image using the checksum file:
```
[<ADMIN> ~]# sha256sum -c TufinOS-X.XX-XXXXXX-x86_64-XXXX-Final.usb.iso.sha256
```
sha256sum -c TufinOS-X.XX-XXXXXX-x86_64-XXXX-Final.usb.iso.sha256
The output should return OK.

Connect the USB flash drive to the Linux server.
Run the command:
```
dmesg | tail
```
dmesg | tail
At the end of the output of this command you will find the USB drive device name. Usually it is /dev/sdb, or /dev/sdc. Copy that name.
Erase the USB flash drive before burning the TufinOS image to the USB flash drive:
```
dd if=/dev/zero of=/dev/<usb flash drive device name> bs=512
```
dd if=/dev/zero of=/dev/<usb flash drive device name> bs=512
Burn only the decompressed TufinOS image file to the USB flash drive:
```
dd if=TufinOS-X.XX-XXXXXX-x86_64-Final.usb.img of=/dev/<usb flash drive device name> bs=512
```
dd if=TufinOS-X.XX-XXXXXX-x86_64-Final.usb.img of=/dev/<usb flash drive device name> bs=512
Where <usb flash drive device name> is the name copied in previous step. This step may take a while; about 60 seconds or less.
Flush the data to the disk to make sure that all data is copied correctly.
```
sync ; sync
```
sync ; sync
Remove the USB key from the machine.

After TufinOS is installed, you can transfer the TOS installation file to the appliance and install it.