For SSL key values mismatch issue, it means the private key file does not match the certificate. There are two main reasons. Error message:Cannot load SSL private key file. Error: error: 0B080074:x509 certificate routines:X509_check_private_key:key values mismatch. What is SSL certificate…
A wildcard certificate is a specific form of the certificate used in TLS/SSL instances. It is a single certificate with a wildcard character (*) in the domain name field. This allows the certificate to secure multiple subdomain names (hosts) pertaining…
PEM (originally “Privacy Enhanced Mail”) file was initially invented to make e-mail secure. Now it is an Internet security standard. PEM file is the most common format for X.509 certificates, CSRs, and cryptographic keys. What is a PEM file A…
There are two major encoding schemes for X.509 certificates and keys: PEM (Base64 ASCII), and DER (binary). We can’t always tell what kind of file we are working with just from looking at the filename; we may need to open…
The first thing that we need to know is there is no C drive or E drive in Linux. We will see something like /dev/sda, /dev/sdb, /dev/sdc, … etc. instead. The dev is short for device. The sd was short…
A block device is a storage device that moves data in sequences of bytes or bits (blocks). These devices support random access and generally use buffered I Examples include hard disks, CD-ROM drives, and flash drives. A block device can…
Amazon Simple Storage Service (Amazon S3) is a scalable, high-speed, web-based cloud storage service. The service is designed for online backup and archiving of data and applications on Amazon Web Services (AWS). Amazon S3 was designed with a minimal feature…
Amazon S3 (Simple Storage Service) is a scalable, high-speed, low-cost web-based service designed for online backup and archiving of data and application programs. It allows to upload, store, and download any type of files up to 5 TB in size.…
Amazon Virtual Private Cloud (VPC) is a service that lets us launch AWS resources in a logically isolated virtual network that we define. Amazon Virtual Private Cloud (Amazon VPC) enables us to launch Amazon Web Services resources into a virtual…
A Fully Qualified Domain Name (FQDN) is the complete domain name of a specific computer, or host, online. A FQDN gives its precise location in the hierarchy of DNS records. It is the complete address for websites and other computers…
