#Openssl view pem file details how to

Issuer: DC=int, DC=dev, CN=dev issuing low 01 Signature Algorithm: sha256WithRSAEncryption You will see output similar to the following. Openssl x509 -in (path to certificate and certificate filename) -text -noout

To example the details of a particular certificate, run the following command: The openssl command is a veritable Swiss Army knife of functions you can use to administer your certificates. crt extensions and will likely be named ‘(hostname).pem’ ‘(hostname).crt’, but sometimes the generic “server” file name is used as well.

SEE: 5 Linux server distributions you should be using (TechRepublic Premium)Ĭertificate files in Linux are generally in the /etc/pki/tls/certs folder or possibly within an application-specific folder such as /etc/httpd for Apache (depending on the whim of the person or vendor who configured/built the application). Security incident response: Critical steps for cyberattack recovery (TechRepublic Premium) The 10 best antivirus products you should consider for your business Pentagon finds concerning vulnerabilities on blockchain Therefore, it’s important to not only keep an eye on upcoming SSL certificate expirations (network scans or at the very least a log keeping track of these certificates are essential) but to completely verify the success of renewing/replacing these certificates. Expiring SSL certificates can be devastating for technological operations, with the impact ranging from worrisome browser error messages to complete production outages.

Learn tips on how you can use the Linux openssl command to find critical certificate details.Īdministering SSL certificates can be quite a chore, especially when it comes time to renew or replace them. SSL certificates are an integral component in securing data and connectivity to other systems.

#Openssl view pem file details how to

How to utilize openssl in Linux to check SSL certificate details