Note for company-wide installations:
If your company has purchased Datical DB, they may have processes for installing and updating Datical DB. Please contact your DBA Lead for instructions on downloading Datical DB in your environment. All installations should use the same version of Datical DB. Use the following instructions only if authorized by your company.

Prerequisites

Are you installing on a Windows or a Linux system?
Do you have access to the download site? See Activating Your Datical Accounts.
Are you on the system where you are installing, and does it have internet access?
- This procedure assumes that you have internet access.

Procedure for Locating and Downloading the Datical DB Installer

In a browser, go to software.datical.com and log in.
Open the COMMON folder on the left side of the page.
Open the Datical_DB_Software folder on the left side of the page.
Click the version you want: Datical_DB_<version_number> folder on the left side of the page. Note: new versions are available often, so this number changes.
Select the checkbox for each component you want to download.
- Composite Repo: DaticalDBCompositeRepo-version.zip
- Linux installer: DaticalDB-linux.type-version.jar
- Windows installer: DaticalDB-win-type-version.exe
- md5 files: For each executable file (.jar, .exe), an md5 file is posted. It has the same filename, but with an .md5 extesion. Download it along with the executable. Use the md5 file to validate the download.
Choose Download > Using Browser.
Save the file and remember the location. You need it during installation.

Using md5 Files to Validate the Downloaded Executable Files

The md5 files are generated for each executable file.

Use the md5 files to validate that the executable file was not changed after the md5 file was generated.

Download the executable file (.jar, .exe) and its md5 file to the same directory.
Run a command to perform the validation.

Command use:

Windows
```
certutil -hashfile <filename>.exe <filename>.md5 
```
The value returned by the command should match the value in the .md5 file. Use a text editor to open the .md5 file.
Linux
```
md5sum <filename>.jar
```
The value returned by the command should match the value in the .md5 file. Use a text editor to open the .md5 file.

Scripted Download of Datical DB Installers

If you'd like to automate the retrieval of Datical DB installers or you work in a headless environment and can't use a browser to retrieve, consult the knowledge base article below for a scripted option.

How To: Downloading Installation Files Using the Command Line on a Unix/Linux Machine