Run nginx -t.
nginx -t
Validate config, read config, and compare a changed copy.
Server operationsnginxcatdiff
Click any instruction for the command details, the why, and the common mistake to avoid.
Run nginx -t.
nginx -t
Run cat /etc/nginx/sites-available/learn.conf.
cat /etc/nginx/sites-available/learn.conf
Run diff data/config-a.conf data/config-b.conf.
diff data/config-a.conf data/config-b.conf
Create a free account to sync completed lessons, XP, streaks, course status, and your next lesson across sessions.
Checking account status...
Progress sync is idle.
Progress sync stores completion IDs, scores, streaks, badges, and game settings. Terminal contents, editor snippets, lab scratch, email, and real names are never published on leaderboards or share cards.
Validate config, read config, and compare a changed copy.
Run the commands in order and compare the outputs.
Junior operators build confidence by gathering evidence before changing systems.
cat <file>
Print text file contents.
diff <left> <right>
Compare two lab text files.
nginx -t
Validate training nginx configuration.