Topics
Security
Data formats
Text
Linux and network
Encoding and conversion
Where to start
First steps
15 stages · From system basics and command input to navigation, files, text, and pipelines.
Track map 11 tracks · 123 stages
Difficulty
New labs
Sections 183 articles
Command index 432
Popular
Web stack
Read the output
$ curl https://www.shop.lab.test/ curl: (60) SSL: no alternative certificate subject name matches target host name 'www.shop.lab.test' $ openssl x509 -in /etc/nginx/tls/shop.crt -noout -ext subjectAltName X509v3 Subject Alternative Name: DNS:shop.lab.test
curl -k
CN = www.shop.lab.test
server_name