ubuntu20.04安装ROS2提示 gpg: 找不到有效的 OpenPGP 数据.

ubuntu20.04安装ROS2提示 gpg: 找不到有效的 OpenPGP 数据.

添加ROS 2 apt存储库
使用以下类似的方法授权我们的GPG密钥:

sudo apt update && sudo apt install curl gnupg2 lsb-release
curl -s https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc | sudo apt-key add -

报错:

gpg: 找不到有效的 OpenPGP 数据。

这里主要原因就是raw.githubusercontent.com是外网地址.
解决办法:
通过浏览器出去(github有链接包,或者百度)打开https://raw.githubusercontent.com/ros/rosdistro/master/ros.asc
1.下载密钥
右键网页,选择另存为文本,命名为ros.asc。
2.这是我从githubusercontent.com下载的证书,基本证书内容都一样,可以参考。

-----BEGIN PGP PUBLIC KEY BLOCK-----
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=4Ofr
-----END PGP PUBLIC KEY BLOCK-----

将上述密钥保存成ros.asc,放在主目录文件夹中就可以了。

在终端键入:

sudo apt-key add ros.asc

显示OK即可。

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