openssl s_client — Basic UsageIT technician command center
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openssl s_client — Basic Usage

Use openssl s_client for a standard administrative task.

Copy-ready commandopenssl s_client — Basic Usage
openssl s_client -connect example.com:443 -servername example.com

Requirements and permissions

Requirements
Linux with the referenced utility installed
Permissions
Use sudo or root only when required
Last reviewed
2026-07-31

Examples

Basic Usage

Use openssl s_client for a standard administrative task.

openssl s_client -connect example.com:443 -servername example.com

Original command

Inspect a TLS connection and certificate chain.

openssl s_client -connect example.com:443 -servername example.com

Common errors

Command not found

Confirm Linux with the referenced utility installed is installed and available in your current shell.