linux - 'bash -c' 有什么作用？

Question

我遵循以下教程:http://davidtsadler.com/archives/2012/06/03/how-to-install-magento-on-ubuntu/

在某些时候它告诉我执行以下命令:

sudo bash -c "cat >> /etc/apache2/sites-available/magento-store.com <<EOF
<VirtualHost *:80>

  ServerName  localhost.magento-store.com
  ServerAlias www.localhost.magento-store.com

  DocumentRoot /home/dev/public_html/magento-store.com/public

  LogLevel warn
  ErrorLog  /home/dev/public_html/magento-store.com/log/error.log
  CustomLog /home/dev/public_html/magento-store.com/log/access.log combined

</VirtualHost>
EOF"

这个命令做了什么，我怎样才能取消它？

我重新启动了计算机，它似乎仍在运行。我查看了.bashrc和.profile，但是里面没有找到。

Answer 1

引用 man bash:

-c string If the -c option is present, then commands are readfrom string.
If there are arguments after the string, they are assigned to the positional parameters, starting with $0.

您引用的命令会将 heredoc 中的文本(即 VirtualHost 标记中的文本)追加到文件 /etc/apache2/sites-available/magento-store.com.