–agent seems to have been replaced --name

If you already have config.sh it takes the argument --help which outputs:

[root@myrunner github-runner]$ ./config.sh --help
Commands:

./config.sh         Configures the runner

./config.sh remove  Unconfigures the runner

./run.sh            Runs the runner interactively. Does not require any options.
Options:

--help     Prints the help for each command

--version  Prints the runner version

--commit   Prints the runner commit
Config Options:

--unattended           Disable interactive prompts for missing arguments. Defaults will be used for missing options

--url string           Repository to add the runner to. Required if unattended

--token string         Registration token. Required if unattended

--name string          Name of the runner to configure (default myrunner)

--runnergroup string   Name of the runner group to add this runner to (defaults to the default runner group)

--labels string        Extra labels in addition to the default: 'self-hosted,Linux,X64'

--work string          Relative runner work directory (default _work)

--replace              Replace any existing runner with the same name (default false)
Examples:

Configure a runner non-interactively:

./config.sh --unattended --url <url> --token <token>
Configure a runner non-interactively, replacing any existing runner with the same name:

./config.sh --unattended --url <url> --token <token> --replace [--name <name>]
Configure a runner non-interactively with three extra labels:

./config.sh --unattended --url <url> --token <token> --labels L1,L2,L3

Version: 2.273.2

HTH