小编pno*_*nom的帖子

我有一个链接，我只想返回 www 之间的内容。和.com

例如www.blablabla.com只会返回blablabla

我怎么能那样做？当我使用grep '\.[a-zA-Z0-9\.-]*\.' 时，它给了我.blablabla.

我正在尝试查找具有给定扩展名的所有文件，但出现此错误：

tar: Cannot update compressed archives
Try 'tar --help' or 'tar --usage' for more information.
tar: Cannot update compressed archives
Try 'tar --help' or 'tar --usage' for more information.
tar: Cannot update compressed archives
Try 'tar --help' or 'tar --usage' for more information.
tar: Cannot update compressed archives
Try 'tar --help' or 'tar --usage' for more information.
tar: Cannot update compressed archives
Try 'tar --help' or 'tar --usage' for more information.
tar: Cannot update compressed archives
Try 'tar --help' or …