openssl s_client — Display and save outputIT technician command center
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openssl s_client — Display and save output

Display output while saving it to a file. Base task: Inspect a TLS connection and certificate chain.

Copy-ready commandopenssl s_client — Display and save output
openssl s_client -connect example.com:443 -servername example.com 2>&1 | tee command-results.txt

Requirements and permissions

Requirements
Linux with the referenced utility installed
Permissions
Use sudo or root only when required
Last reviewed
2026-08-01

Examples

Display and save output

Display output while saving it to a file.

openssl s_client -connect example.com:443 -servername example.com 2>&1 | tee command-results.txt

Common errors

Command or option not supported

Confirm the installed platform version supports the base command and the added output or wrapper option.

Access denied or insufficient privileges

Run with the administrative role or delegated permission required by the underlying command.