On a Linux 8 system with FIPS enabled, connecting to a Linux 6 system fails, ssh -v displays the following message ssh_dispatch_run_fatal: Connection to XXX port 22: invalid argument Solution The simplest solution is to delete file /etc/ssh/moduli on the Linux 6 system serving as sshd backend. The same workaround is applicable for other Linux …

PFX files are digital certificates that contain both the SSL certificate (public keys) and private key. They’re essential for establishing secure connections between two devices. PFX files are usually issued by a certificate authority and contain information about the issuing CA, the certificate holder, and the certificate’s public and private keys. If you’re looking for …

For SSL key values mismatch issue, it means the private key file does not match the certificate. There are two main reasons. key values mismatch in private key, CSR, and certificate file. certificate chain order is not correct Error message:Cannot load SSL private key file. Error: error: 0B080074:x509 certificate routines:X509_check_private_key:key values mismatch. What is SSL …

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 to the same base domain. For example, a wildcard certificate for *.(domainname).com, could be used …

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 PEM file is a text file containing one or more items in Base64 ASCII encoding, …

There are two major encoding schemes for X.509 certificates and keys: PEM (Base64 ASCII), and DER (binary). DER (Distinguished Encoding Rules) is a data object encoding schema that can be used to encode certificate objects into binary files. PEM (Privacy Enhanced Mail) is an encrypted email encoding schema that can be borrowed to encode certificate …

A disk partition is a contiguous space of storage on a physical or logical disk that functions as if it were a physically separate disk. Partitions are visible to the system firmware and the installed operating systems. Access to a partition is controlled by the system firmware before the system boots the operating system, and …

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 for Small Computer System Interface (SCSI) mass-storage driver. /dev/sda – The first SCSI disk SCSI …

This article is part of the following series. 6 performance tools you should know in Linux 5 Ways to Check disk size in Linux 4 Ways to Check Disk Partition with Examples in Linux How I Fixed a disk performance issue in Minutes – A Step by Step Guide to Optimize Linux System   To …

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/O. Examples include hard disks, CD-ROM drives, and flash drives. A block device can be physically attached to a computer or accessed remotely as if it were physically attached …