Verify and unzip the installation zip file

To verify that the installation zip file is not corrupted, you must check its integrity.

Use the preinstalled sha256sum tool to verify that the checksum for the zip file matches with the checksum provided in the Release Notes.

Go to the Safer Payments Release Notes for the release or fix pack you are installing. Get the checksum value.
Log in as root on the console.
Run the sha256sum checksum tool:
```
sha256sum SaferPayments_6_3_x_x.zip
```
Verify that the tool's output is the same as the checksum given in the Release Notes.
Extract the .zip file to a temporary directory:
```
unzip SaferPayments_6_3_x_x.zip
```

The following files are extracted from the zip file:

SaferPayments.bin: The installation image file.
ibm_jre_8.0.2.10_linux_x64.vm: The setup file to install LINUX IBM® JRE 1.8 SR2 FP10 (64-bit). You need this file only if you don't have JVM installed.; For more information, see Prepare the Java Runtime Environment.
installer.properties: The sample response file. You need this file only if you want to run the installer in silent mode.