Shell Programming and Scripting

Hi all

I want to inquire that is there any unix command that can help me while extracting first and last line in a file ( TEST.dat)
for example in the below record i want to extract the line that are in BOLD text or in other words i want to extract line no 1,3,4 and 7

aa 1 2 3
aa 2 3 4
aa 3 4 5
bb 1 2 3
bb 2 3 4
bb 3 4 5
bb 4 5 6


Please help me, quick response will be highly appericiated

Regards,
Bungash

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start your own instead.

Thank you!

Post moved.

Use GNU awk (gawk), New awk (nawk) or POSIX awk (/usr/xpg4/bin/awk):

Code:

awk 'END { print l }
!f[$1]++ { printf "%s\n", \
l ? l RS $0 : $0 }
{ l = $0 }' infile

i have problem similar like that (almost same i want only the last lines of records. The awk code is above working perfectly. but i cant convert it for my case can you (or anybody ) help me too?

i want these bold lines:

1233625770 416
1233625770 788
1233625771 912
1233625771 5252
1233625772 5376

Code:

awk 'END { print l }
!f[$1]++ && l { print l }
{ l = $0 }' infile

radoulov, thanks for your response. regards.