This article is part of the following series. 4 ways to list files within a rpm package in Linux 3 ways to Check RPM package dependency in Linux How to use yum to list All versions of Package in Linux 5 ways to list installed packages in Linux The default behavior of yum is …
Linux
This article is part of the following series. 2 ways to Create New User with home directory in Linux 4 Ways to Find User Home Directory in Linux 3 ways to change user home directory in Linux In Linux, the home directory (also called “home” or “home folder”) is a directory designated for a …
Ping is used to check if the machine is up and is connected to the network and working well on that particular network. The basic methodology here is that a network packet is sent to the machine if the machine is up it will answer with a response. If the machine is down and not …
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 …
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 …
An SPF (Sender Policy Framework) record is a type of TXT record in our DNS zone file. SPF records help identify which mail servers are permitted to send email on behalf of our domain. Adding an SPF record can help detect and prevent spammers from sending email messages with forged From addresses on our domain. …
DNS PRT record is short for pointer record. It is one of the common Domain Name System (DNS) records. It resolves an IP address to a domain or hostname. It is also called DNS reverse record. The following commands can be used to check PTR record in Linux. dig -x 8.8.8.8 nslookup 8.8.8.8 What …
DNS MX record is short for mail exchange. It is used to direct email to a mail server. The MX record indicates how email messages should be routed when we send out an email. The best way is to check dns MX record in Linux is using the dig command. For example: dig domain.com mx …
A port is a virtual numbered address that’s used as a communication endpoint by transport layer protocols like UDP (user diagram protocol) or TCP (transmission control protocol). Network ports direct traffic to the right places — i.e., they help the devices involved identify which service is being requested. For instance, the port that’s responsible for …
An SSL certificate helps to secure the communication between a client (such as a web browser) and a server (such as a website). If the certificate has expired, it can no longer be trusted to secure this communication, and an attacker may be able to intercept and view sensitive information being transmitted between the client …