/dev/stdout

wikipedia:Stdout

• 2>&1

• >&

• The twelve-factor app treat logs as event streams and each runnig process ts event stream, unbuffered, to stdout.

Related

• set -x

See also

• Standard streams: /dev/stdin, /dev/stdout, /dev/stderr, /dev/null, File descriptor, set -x, 2>&1, stdbuf
• Linux logging, Cisco IOS logging

https://12factor.net/logs