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update the Forgot root password (#11974) #12779

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Mar 6, 2023
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update the Forgot root password (#11974) #12779

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update the Forgot root password
TomShawn Jan 10, 2023
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Update user-account-management.md
TomShawn Jan 10, 2023
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TomShawn Jan 20, 2023
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47 changes: 37 additions & 10 deletions user-account-management.md
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Expand Up @@ -184,20 +184,47 @@ TiDB stores passwords in the `mysql.user` system database. Operations that assig

## Forget the `root` password

1. Modify the configuration file by adding `skip-grant-table` in the `security` part:
1. Modify the configuration file:

```
[security]
skip-grant-table = true
```
1. Log in to the machine where one of the tidb-server instances is located.
2. Enter the `conf` directory under the TiDB node deployment directory, and find the `tidb.toml` configuration file.
3. Add the configuration item `skip-grant-table` in the `security` section of the configuration file. If there is no `security` section, add the following two lines to the end of the tidb.toml configuration file:

2. Start TiDB with the modified configuration. Use `root` to log in and then modify the password:
```
[security]
skip-grant-table = true
```

```bash
mysql -h 127.0.0.1 -P 4000 -u root
```
2. Stop the tidb-server process:

1. View the tidb-server process:

```bash
ps aux | grep tidb-server
```

2. Find the process ID (PID) corresponding to tidb-server and use the `kill` command to stop the process:

```bash
kill -9 <pid>
```

3. Start TiDB using the modified configuration:

> **Note:**
>
> If you set `skip-grant-table` before starting the TiDB process, a check on the operating system user will be initiated. Only the `root` user of the operating system can start the TiDB process.

1. Enter the `scripts` directory under the TiDB node deployment directory.
2. Switch to the `root` account of the operating system.
3. Run the `run_tidb.sh` script in the directory in the foreground.
4. Log in as `root` in a new terminal window and change the password.

```bash
mysql -h 127.0.0.1 -P 4000 -u root
```

When the `skip-grant-table` is set, starting the TiDB process will check whether the user is an administrator of the operating system, and only the `root` user of the operating system can start the TiDB process.
4. Stop running the `run_tidb.sh` script, remove the content added in the TiDB configuration file in step 1, and wait for tidb-server to start automatically.

## `FLUSH PRIVILEGES`

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