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Update update.md

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Fixed content for generic version
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Hasitha Kanchana 2021-02-10 10:01:43 +01:00 committed by GitHub
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docs/en/operations/update.md
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@ -20,11 +20,14 @@ ClickHouse does not support a distributed update. The operation should be perfor
The upgrade of older version of ClickHouse to specific version:
As an example:
xx.yy.a.b is a current stable version. The latest stable version could be found [here](https://github.com/ClickHouse/ClickHouse/releases)
```bash
$ sudo apt-get update
$ sudo apt-get install clickhouse-server=20.12.4.5 clickhouse-client=20.12.4.5 clickhouse-common-static=20.12.4.5
$ sudo apt-get install clickhouse-server=xx.yy.a.b clickhouse-client=xx.yy.a.b clickhouse-common-static=xx.yy.a.b
$ sudo service clickhouse-server restart
```
Note: It's always recommended to backup all databases before initiating the upgrade process. Please make sure the new version is compatible with new changes so on.