**Use case**

It prints:
```
ClickHouse has been successfully installed.

Start clickhouse-server with:
 sudo clickhouse start
```

But if clickhouse-server is already running, let's print:
```
ClickHouse has been successfully installed.

Restart clickhouse-server with:
 sudo clickhouse restart
```
{
    try
    {
        po::options_description desc;
        desc.add_options()
            ("help,h", "produce help message")
            ("prefix", po::value<std::string>()->default_value("/"), "prefix for all paths")
            ("binary-path", po::value<std::string>()->default_value("usr/bin"), "where to install binaries")
            ("config-path", po::value<std::string>()->default_value("etc/clickhouse-server"), "where to install configs")
            ("log-path", po::value<std::string>()->default_value("var/log/clickhouse-server"), "where to create log directory")
            ("data-path", po::value<std::string>()->default_value("var/lib/clickhouse"), "directory for data")
            ("pid-path", po::value<std::string>()->default_value("var/run/clickhouse-server"), "directory for pid file")
            ("user", po::value<std::string>()->default_value(DEFAULT_CLICKHOUSE_SERVER_USER), "clickhouse user to create")
            ("group", po::value<std::string>()->default_value(DEFAULT_CLICKHOUSE_SERVER_GROUP), "clickhouse group to create")
        ;