openssl version # Output example: OpenSSL 3.0.2 15 Mar 2022 (Library: OpenSSL 3.0.2 15 Mar 2022) RHEL 9 and Fedora use OpenSSL 3.0. RHEL 8 and CentOS 8 use OpenSSL 1.1.1.
./config
sudo rm -rf /opt/openssl-3.3.0 Then remove any environment variables or ldconfig entries you added. Installing OpenSSL ranges from a one-line command ( sudo apt install openssl ) to a meticulous source compilation with custom flags. The method you choose depends on your need for control, isolation, and version specificity. how to install openssl
The installed version is hardened by Red Hat with backported security fixes. The openssl version command may show an older base version (e.g., 1.1.1k), but it includes critical patches. 2.3 Arch Linux / Manjaro (pacman) Arch Linux maintains very current packages, often tracking the latest OpenSSL release.
# Install Chocolatey first, then: choco install openssl If you need a Linux-like environment with OpenSSL for development: openssl version # Output example: OpenSSL 3
export CFLAGS="-I/opt/openssl-3.3.0/include" export LDFLAGS="-L/opt/openssl-3.3.0/lib" export PKG_CONFIG_PATH="/opt/openssl-3.3.0/lib/pkgconfig" ./configure --with-ssl=/opt/openssl-3.3.0 Cause: The linker cannot find libssl. Ensure you have the development package installed ( libssl-dev on Debian, openssl-devel on RHEL). Problem 4: OpenSSL command found, but openssl version shows old version Cause: A different openssl binary appears earlier in your PATH.
OpenSSL is the ubiquitous, robust, full-featured toolkit for the Transport Layer Security (TLS) and Secure Sockets Layer (SSL) protocols. It is the cryptographic backbone of the modern internet, used by web servers (Apache, Nginx), databases, VPNs, and countless command-line utilities. Despite the emergence of alternatives like LibreSSL and BoringSSL, OpenSSL remains the industry standard. Installing OpenSSL ranges from a one-line command (
# Add to your shell profile export PATH="/opt/openssl-3.3.0/bin:$PATH" export LD_LIBRARY_PATH="/opt/openssl-3.3.0/lib:$LD_LIBRARY_PATH" # Linux # OR for macOS: export DYLD_LIBRARY_PATH="/opt/openssl-3.3.0/lib:$DYLD_LIBRARY_PATH" export PKG_CONFIG_PATH="/opt/openssl-3.3.0/lib/pkgconfig:$PKG_CONFIG_PATH" Verify /opt/openssl-3.3.0/bin/openssl version Part 6: Post-Installation Verification After any installation method, you should verify the installation is functional and secure. 6.1 Basic Version Check openssl version -a This shows version, build date, compiler flags, and directory paths. Pay attention to OPENSSLDIR – it tells you where openssl.cnf is located. 6.2 Test Cryptographic Operations # Generate a random key openssl rand -hex 32 Calculate SHA-256 of a file echo "test" > file.txt openssl dgst -sha256 file.txt Test TLS connection to a remote server openssl s_client -connect google.com:443 -servername google.com