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Use the Fly.io CLI (flyctl) to deploy applications to edge locations, manage machines, volumes, secrets, and databases.
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| name | fly-cli |
| description | Use the Fly.io CLI (flyctl) to deploy applications to edge locations, manage machines, volumes, secrets, and databases. |
Official CLI for Fly.io. Deploy apps globally to edge locations with Firecracker VMs.
fly auth login # Browser-based login
fly auth token # Print auth token
fly auth whoami # Check current user
fly launch # Create and configure new app
fly deploy # Deploy current directory
fly deploy --image my-registry/my-app:v1 # Deploy specific image
fly apps list
fly status # Current app status
fly open # Open app in browser
fly machine list
fly machine start MACHINE_ID
fly machine stop MACHINE_ID
fly machine restart MACHINE_ID
fly machine status MACHINE_ID
fly scale count 3 # Set instance count
fly scale vm shared-cpu-1x # Change VM size
fly scale memory 512 # Set memory (MB)
fly scale show # Show current scale
fly regions add ord # Add region
fly regions list # List regions
fly secrets set DATABASE_URL=postgres://...
fly secrets list
fly secrets unset DATABASE_URL
fly logs # Stream logs
fly ssh console # SSH into running machine
fly ssh console -C "ls /app" # Run command via SSH
fly postgres create # Create managed Postgres
fly postgres list
fly postgres connect -a my-db # Connect to Postgres
fly volumes create my_data --size 10 # Create 10GB volume
fly volumes list
fly status to check app health and deployment statusfly deploy --strategy rolling for zero-downtime deploysfly logs to debug issues after deploymentfly secrets set triggers a redeployfly ssh console -C "command" for one-off remote commandsfly scale count to manage instance count per regionfly deploy
fly status
fly logs --instance INSTANCE_ID
fly regions add lax ord ams
fly scale count 2
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