$ cat rs.txt
beyes
groad.net
10
20
(两个换行)
admin
baidu.com
30
40
(两个换行)
tony
sina.com.cn
29
69
(两个换行)
linus
kernel.org
100
98
beyes
groad.net
10
20
beyes groad.net
admin baidu.com
$ awk 'BEGIN { RS="\n\n"; FS="\n"; }
> { print $1, $2; }
> END {print "End of processed"}' rs.txt
beyes groad.net
admin baidu.com
tony sina.com.cn
linus kernel.org
End of processed
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