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How to Configure SSH Key Pair Authentication on RHEL 7/CentOS 7/RHEL 8/CentOS 8 SSH stand for Secure Shell or Secure Socket Shell. SSH is use to take Shell session securely, SSH is a cryptographic network protocol. Secure Socket Shell (SSH) is a network protocol that use port 22 of Transmission Control Protocol (TCP) and it is work on transport layer through application layer of OSI Model. The main purpose of Secure Socket Shell (SSH) is to take remote session securely. By use of Secure Socket Shell (SSH) data is encrypted between the computers means client and server, and Secure Socket Shell (SSH) protocol transfer the files securely. Secure Socket Shell (SSH) is the replacement of insecure terminal like telnet, rsh (remote shell) and rlogin (remote login) because Secure Socket Shell (SSH) provide a secure channel or tunnel for connectivity between client machine and server machine. For transferring a file, Secure Socket Shell (SSH) is also replacement of File transfer protocol due to

How Process Commands Works on RedHat 8/CentOS 8/RedHat 7/CentOS 7 Processing is a series of action to achieve a desire output that perform by the Central Processing Unit (CPU). Computers are communicate with each other and other devices by use of commands that is called Computer Processing. The Computer processing is an action of microprocessor that known as Central Processing Unit. The basic definition of Central Processing Unit (CPU) is a brain of Computer System to execute the instructions that instruct by application or program, the instruction first loaded on a Random Access Memory (RAM) then it is forward to the Central Processing Unit (CPU). The Central Processing Unit (CPU) generally known as processor, Central Processing Unit (CPU) is integrated circuit chip that attach with motherboard in a computer that process the instructions. The Central Processing Unit (CPU) is use to perform arithmetic and logical I/O operations. Three components of Central Processing Unit (CPU) are

 Archive and Extract Data on RHEL 8 By use of Command “tar” Archive is a collection of data that are file and directories. By the help of archiving, you can collect a data in a single file. In archiving of data, the compression is use to reduce the size of data. In Window system, the archive files with compression contain the extension .rar, .zip, etc. In Linux system, the archive files with compression contain the extensions .tar.gz or tgz, .tar.bz2, .tar.xz, etc. Mostly archive is used to store large amount of data and compression is apply to reduce its size. Archive is use to protect data from damages and lost, if original data delete for any reason the archive data is last hope on that case. Archiving is a convenient way to collect the multiple files and multiple directories into single file, the files can be any format. In an archive file, you can read the content easily without restore the complete content. For sending an email archive file is very useful to send multiple files