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Secure Shell Remote Login

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Securely connect to remote systems using encrypted communication.

Change Permissions

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Change file permissions

Change Owner

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Change file owner and group

linux/openssl

OpenSSL

SSL/TLS toolkit

ssl
security
encryption

Command

openssl

Explanation

OpenSSL is a cryptographic library providing SSL/TLS encryption and certificate management.

Examples

Generate self-signed certificate

openssl req -new -x509 -days 365 -nodes -out cert.pem -keyout key.pem

View certificate details

openssl x509 -in cert.pem -text -noout

Test SSL connection

openssl s_client -connect example.com:443

More

Secure Copy Files Between Hosts

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Securely copy files or directories between local and remote hosts over SSH.

Change Password

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Change user password

Switch User

linux

Switch to another user account