When I grep for 'ci=' I got this line and also many other line which has 'ci=' But I have to grep for the line where ci= numbers. for eg: ci=4365345 Can you please tell me how to extract ci=numbers and also remove all the characters before ci and all characters after numbers of ci. 
               
             
<body onunload="params='s=o&n=o&ci=5413226&iv=0&pi=34&sessid=c1e7be2e5
+d3518213a67577cf5b2b1c4bd0a0619&uuid=c1e7be2e5d3518213a67577cf5b2b1c4
+bd0a0619&prt=1238476904&pgtp=article&eagi=&t_v=v&">

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How to grep only for

In reply to grep for numbers by sandy1028

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