ClickHouse can run on any Linux, FreeBSD or Mac OS X with x86\_64, AArch64 or PowerPC64LE CPU architecture.
Official pre-built binaries are typically compiled for x86\_64 and leverage SSE 4.2 instruction set, so unless otherwise stated usage of CPU that supports it becomes an additional system requirement. Here's the command to check if current CPU has support for SSE 4.2:
To run ClickHouse on processors that do not support SSE 4.2 or have AArch64 or PowerPC64LE architecture, you should [build ClickHouse from sources](#from-sources) with proper configuration adjustments.
It is recommended to use official pre-compiled `tgz` archives for all Linux distributions, where installation of `deb` or `rpm` packages is not possible.
For production environments it's recommended to use latest `stable`-version. You can find it's number on github page https://github.com/ClickHouse/ClickHouse/tags with postfix `-stable`.
To run ClickHouse inside Docker follow the guide on [Docker Hub](https://hub.docker.com/r/yandex/clickhouse-server/). Those images use official `deb` packages inside.
### From Sources
To manually compile ClickHouse, follow the instructions for [Linux](../development/build.md) or [Mac OS X](../development/build_osx.md).
You can compile packages and install them or use programs without installing packages. Also by building manually you can disable SSE 4.2 requirement or build for AArch64 CPUs.
```
Client: dbms/programs/clickhouse-client
Server: dbms/programs/clickhouse-server
```
You'll need to create a data and metadata folders and `chown` them for the desired user. Their paths can be changed in server config (src/dbms/programs/server/config.xml), by default they are:
```
/opt/clickhouse/data/default/
/opt/clickhouse/metadata/default/
```
On Gentoo you can just use `emerge clickhouse` to install ClickHouse from sources.
## Launch
To start the server as a daemon, run:
``` bash
$ sudo service clickhouse-server start
```
If you don't have `service` command, run as
``` bash
$ sudo /etc/init.d/clickhouse-server start
```
See the logs in the `/var/log/clickhouse-server/` directory.
If the server doesn't start, check the configurations in the file `/etc/clickhouse-server/config.xml`.
You can also manually launch the server from the console:
In this case, the log will be printed to the console, which is convenient during development.
If the configuration file is in the current directory, you don't need to specify the `--config-file` parameter. By default, it uses `./config.xml`.
ClickHouse supports access restriction settings. They are located in the `users.xml` file (next to `config.xml`).
By default, access is allowed from anywhere for the `default` user, without a password. See `user/default/networks`.
For more information, see the section ["Configuration Files"](../operations/configuration_files.md).
After launching server, you can use the command-line client to connect to it:
``` bash
$ clickhouse-client
```
By default it connects to `localhost:9000` on behalf of the user `default` without a password. It can also be used to connect to a remote server using `--host` argument.
The terminal must use UTF-8 encoding.
For more information, see the section ["Command-line client"](../interfaces/cli.md).
