Code:
$ cat infile
CDR_Data,,,,,
F1,F2,F3,F4,F5,F6
5,5,6,7,8,7
6,6,g,,,
7,7,76,,,
8,8,gt,,,
9,9,df ,d,d,d
,,,,,
Logic for CDR Records,,,,,
<Indicate the Records Flag>,,,,,
,,,,,
,, Load,,,
,,,,,
,,Data files loaded at hourly basis.,,,
,,,,,
,,Data files loaded at hourly basis.,,,
,,,,,
,,Data files loaded at hourly basis.,,,
,,,,,
,,Data files loaded at hourly basis.,,,
,,,,,
,Data files loaded at hourly basis.,,,
,,,,,
,,Data files loaded at hourly basis.,,,
,,,,,
,,,,,
,, Load Status,,,
,,,,,
,,,,,
,,,,,
,,,,,
,,,,,
,,,,,
,,,,,
$ sed -ne '/^[0-9]/p' infile
5,5,6,7,8,7
6,6,g,,,
7,7,76,,,
8,8,gt,,,
9,9,df ,d,d,d