![]() ![]() Open a terminal and run the following cp command to make a copy of the original sshd configuration file. It’s time to configure our OpenSSH behavior through the ssh config file, but before editing the /etc/ssh/sshd_config file we need to back up a copy of it, so in case we make any mistake we have the original copy. Install OpenSSH in RedHat Systems Configure OpenSSH Server in Linux # yum -y install openssh-server openssh-clients On RedHat-based distribution, type the following yum command to install the openssh server and client. Install OpenSSH in Debian Systems On RHEL/Centos/Fedora $ sudo apt install openssh-server openssh-client On Debian-based distributions, you can use the following apt command to install the openssh server and client as shown. ![]() To install OpenSSH, open a terminal and run the following commands with superuser permissions. SFTP client and server support in both SSH1 and SSH2 protocols.Interoperability (Compliance with SSH 1.3, 1.5, and 2.0 protocol Standards).Strong Authentication ( Public Key, One-Time Password, and Kerberos Authentication).Port Forwarding (encrypted channels for legacy protocols).X11 Forwarding (encrypt X Window System traffic).Strong Encryption ( 3DES, Blowfish, AES, Arcfour).If a third party tries to intercept your connection, OpenSSH detects it and informs you about that. The most important reason why one should use OpenSSH tools over ftp and Telnet is that all communications and user credentials using OpenSSH are encrypted, and they are also protected from man-in-middle attacks. The latest version is OpenSSH 9.3 which has been released on 15 March 2023 and comes with many new features and patches, so if you already use OpenSSH for administering your machines, I suggest you do an upgrade or install ssh from the source. A main factor that has made it possible for OpenSSH to be used so much among system administrators is its multi-platform capability and very useful nice features it has. OpenSSH is developed by the Open BSD group and it is released under a Simplified BSD License. Many people, new to computers and protocols, create a misconception about OpenSSH, they think it is a protocol, but it is not, it is a set of computer programs that use the ssh protocol. OpenSSH is a free open-source set of computer tools used to provide secure and encrypted communication over a computer network by using the ssh protocol. But, what is OpenSSH, and how to install it in your Linux distribution? What is OpenSSH? SSH is a secure remote protocol that is used to work remotely on other machines or transfer data between computers using SCP (Secure Copy) command. The one I will discuss in this article is ssh. Being a network administrator requires deep knowledge of remote login protocols such as rlogin, telnet, and ssh. ![]()
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