Excuse me: How can I use the SH script to extract the specified row from a file?

Source: Internet
Author: User
Excuse me: How can I use the SH script to extract the specified row from a file? -- Linux general technology-Linux technology and application information. For details, refer to the following section. File 1:
239526 121.229.53.235 11:19:54
303226 122.159.17.142 16:58:45
......
File 2:
116.21.145.143 239526, http://xxxx.com/cilpage/042.htm,20080822
221.210.29.20.1615383, http://xxxx.com/time/sg2007/news/client_news01.htm,20080822
....

To retrieve the rows that meet the conditions from file 2: The second field in file 2 exists in the first field in file 1, such as 239526
Final file 3:
116.21.145.143 239526, http://xxxx.com/cilpage/042.htm,20080822
......
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