Knowledge Base

If you would like to move your certificate(s) into a bundle file, you can use a cat command in a Linux bash

example:  cat domain_com.crt domain_com.ca-bundle.crt > ssl-bundle.crt

note:  “domain_com.crt” is your End Entity certificate file
           “domain_com.ca-bundle.crt” is your Root and Intermediate certificates bundled in this file.


In the event you have received the root and intermediate certificates separately, run the following command.
example: cat domain_com.crt USERTrustRSAAddTrustCA.crt AddTrustExternalCARoot.crt > domain_com.ca-bundle.crt


If you are using a GUI based Text Editor (such as; Notepad)

• Here is how to concatenate the certificate files into single bundle file:

1. Open domainname.crt and domainname.ca-bundle files using any text editor.

2. Copy all the content of domainname.crt and paste it on the top of domainname.ca-bundle file.

3. Save the file name as ‘ssl-bundle.crt’.

• ​​​To concatenate your certificate with your private key:

      1.  Generate CSR

openssl req -new -newkey rsa:2048 -nodes -keyout path:\server.key -out path:\server_csr.txt

      2.  Download the certificate with your chain from SCM (eg: my_certificate.cer)
      3.  Concatenate the certificates with your private key:

openssl pkcs12 -export -out path:\[new cert bundle name].pfx -inkey path:\server.key -in path:\my_certificate.cer
 

Related Articles:Certificate Installation:  Dovecot + Exim