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[FAQ] add help for download openmpi-4.0.1.tar.bz2 failed in china #6

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Merged
gwind merged 1 commit into from
Jul 21, 2019
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[FAQ] add help for download openmpi-4.0.1.tar.bz2 failed in china #6

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27 changes: 27 additions & 0 deletions docs/zh/install_from_scratch.md
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Expand Up @@ -147,3 +147,30 @@ make manual_main
# 执行测试
time mpirun -n 2 ./manual_main
```

## FAQ

### 下载 openmpi-4.0.1.tar.bz2 错误

执行下载命令：

```bash
wget https://download.open-mpi.org/release/open-mpi/v4.0/openmpi-4.0.1.tar.bz2
```

出现错误：

```text
--2019-07-21 10:52:45-- https://download.open-mpi.org/release/open-mpi/v4.0/openmpi-4.0.1.tar.bz2
Resolving download.open-mpi.org... failed: nodename nor servname provided, or not known.
wget: unable to resolve host address ‘download.open-mpi.org’
```

通常是网络问题（国内较为常见，不同地区表现时间也不尽相同），建议方法有：

1. 换下 DNS Nameserver 。更新下 `/etc/resolv.conf` 文件中的 nameserver 配置。
2. 通过其他途径，下载好 `openmpi-4.0.1.tar.bz2` 软件包，拷贝到这里。
3. 去 [https://github.com/open-mpi/ompi](https://github.com/open-mpi/ompi) 看下其他下载方式。
4. 通过搜索引擎，寻找其他镜像站点 (mirror site) 下载。
5. 等待一段时间，这种问题通常过段时间就好。
6. 联系我们。