Please tell me the command(s) to remove a particular record from the file and placing the rest of the record in a seperate file.
Post a sample of your input file in the original format and the exact output you want and please place them within code tags (select the text and click on the # symbol above the edit window).
Please find the attached file in text format.
say if i have to remove the NA2 record and NPD record. (this is a portion of file which contains thousands of records). i believe sed pattern matching will work.
grep solution
grep -v '^NA2\|^NPD' file > new_file
file type:
NMT000010000100001ENVL,CSP,28#,9X12,KFT,1C 00001
NA20000105500000003081547100100008000000000024.19 000000000000001DZ 000000000024.19 000000000000000 00002
NPD TOP63120 TOP63120
NP2 00000000000000 00000000000000 000 00000000000000 00000000000001 00000000000000 00000000000000
NMT000010000800001PAD,LGL RL,PRISM,LTR,BE
grep is not doing anything.
new_file is still with the same records.
anything with the sed?
grep -vE '^(NPD|NA2)' file > file2
While it's trivial to do this in sed, if there's a way to remove newlines in sed, I've never found it. You could always try piping it into Perl:
cat file | perl -ne 'print unless /^(NPD|NA2)/;'
Work's for me 
$ cat file
NMT000010000100001ENVL,CSP,28#,9X12,KFT,1C 00001
NA20000105500000003081547100100008000000000024.19 000000000000001DZ 000000000024.19 000000000000000 00002
NPD TOP63120
TOP63120
NP2
00000000000000 00000000000000 000
00000000000000 00000000000001 00000000000000 00000000000000
NMT000010000800001PAD,LGL RL,PRISM,LTR,BE
$ grep -v '^NA2\|^NPD' file > new_file
$ cat new_file
NMT000010000100001ENVL,CSP,28#,9X12,KFT,1C 00001
TOP63120
NP2
00000000000000 00000000000000 000
00000000000000 00000000000001 00000000000000 00000000000000
NMT000010000800001PAD,LGL RL,PRISM,LTR,BE
$ wc -l file
8 file
$ wc -l new_file
6 new_file
Or sed
$ sed '/^NA2/d;/^NPD/d;' file > new_file2
$ wc -l new_file2
6 new_file2
well both are doing good.
but in perl just wanted to move the records and not print them...
anyways some research from my side is good for me also ....
Dan, dont know why the 'grep -v' not working but your 'sed' option is working [