Upgrade OpenSSH
How to upgrade OpenSSH version in RHEL, Rocky Linux and AlmaLinux?
Overview: This article will help Linux user to upgrade the OpenSSH version on RHEL-based operating systems.
Step 1: Install development tools and dependencies.
root@gateway:~# yum groupinstall "Development Tools" -y
root@gateway:~# yum install gcc -y
Step 2: Make sure to backup SSH configurations before upgrading.
root@gateway:~# cp /etc/ssh/sshd_config /etc/ssh/sshd_config.backup
Step 3: Check the currently supported key types and algorithms before upgrading.
root@gateway:~# sshd -T | grep -i 'key\|algorithms'
root@gateway:~# sshd -T | grep -i 'key\|algorithms' > ./sshd.backup
Step 4: Download the latest OpenSSH version tar.gz file.
root@gateway:~# wget https://cdn.openbsd.org/pub/OpenBSD/OpenSSH/portable/openssh-9.9p2.tar.gz
Step 5: Follow the steps below to extract and install the latest OpenSSH.
root@gateway:~# tar -xvf openssh-9.9p2.tar.gz
root@gateway:~# cd openssh-9.9p2
root@gateway:~# ./configure
root@gateway:~# make
root@gateway:~# make install
Step 6: Check the version after completing the above steps.
root@gateway:~# ssh -V
OpenSSH_9.9p2, OpenSSL 3.2.2 4 Jun 2024
Step 7: Check the supported key types and algorithms after upgrading.
root@gateway:~# sshd -T | grep -i 'key\|algorithms'
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