# GreptimeDB Command Line Overview

> Comprehensive overview of the GreptimeDB command-line interface, including installation instructions, available commands, global options, and practical examples for starting services and managing GreptimeDB instances.

# Overview

The `greptime` command can start/stop GreptimeDB and pass configuration options. 

## Install the Greptime CLI

The Greptime CLI is bundled with the GreptimeDB binary.

If you start GreptimeDB using the binary file as described in the [installing GreptimeDB](/getting-started/installation/overview.md) documentation,
you can execute the `./greptime` command from within the GreptimeDB directory.
For convenience, if you prefer to run commands using `greptime` instead of `./greptime`,
consider moving the CLI binary to your system's `bin` directory or adding the binary's path to your `PATH` environment variable.

If you deployed GreptimeDB in Kubernetes, you can access the greptime command line through the frontend pod. Use the following command to enter the pod:

```sh
kubectl exec -it <greptimedb-frontend-pod> -n <namespace> -- /bin/bash
```

Once inside the pod, you can run `greptime help` to see all available commands.

## CLI Options

The `help` command lists all available commands and options of `greptime`.

```sh
$ greptime help
Usage: greptime [OPTIONS] <COMMAND>

Commands:
  datanode    Start datanode service
  flownode    Start flownode service
  frontend    Start frontend service
  metasrv     Start metasrv service
  standalone  Run greptimedb as a standalone service
  cli         Execute the cli tools for greptimedb
  help        Print this message or the help of the given subcommand(s)

Options:
      --log-dir <LOG_DIR>
      --log-level <LOG_LEVEL>
  -h, --help                   Print help
  -V, --version                Print version
```

### Global options

| Option                    | Description                                                |
| ------------------------- | ---------------------------------------------------------- |
| `-h`/`--help`             | Print help information                                     |
| `-V`/`--version`          | Print version information                                  |
| `--log-dir <LOG_DIR>`     | The logging directory, default is `./greptimedb_data/logs` |
| `--log-level <LOG_LEVEL>` | The logging level, default is `info`                       |

### Subcommands 
- [Metasrv](/reference/command-lines/metasrv.md)
- [Datanode](/reference/command-lines/datanode.md)
- [Flownode](/reference/command-lines/flownode.md)
- [Frontend](/reference/command-lines/frontend.md)
- [Standalone](/reference/command-lines/standalone.md)

### Upgrade GreptimeDB version

Please refer to [the upgrade steps](/user-guide/deployments-administration/upgrade.md)