rrd's questions

当我们启动一个 GNU/linux 系统时，它会在标准输出上显示很多消息。然后，就在提示之前，它显示如下内容：

Linux raspberrypi 4.19.66-v7+ #1253 SMP Thu Aug 15 11:49:46 BST 2019 armv7l

The programs included with the Debian GNU/Linux system are free software;
the exact distribution terms for each program are described in the
individual files in /usr/share/doc/*/copyright.

Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent
permitted by applicable law.

我想隐藏该消息。我需要编辑哪个文件才能完成此操作？

我想知道为什么从当前 shell 中的文件执行命令的命令被命名为source. 我看不到当前 shell 中的运行命令与英文单词source的含义之间的关系。这个名字背后有历史吗？