Extracting specific lines/rows with awk

[vishal.rossi]

I have to extract the line/row which begins with 1 10515 15143 128 2....and so on. The file is huge and doesn't begin with 1 in all the cases.

Can anyone tell me how to extract with awk or with some other command.
Thanks


HWI-ST0764:99:C0BV6ACXX:4:1204:6906:61789 83 1 15143 0 = 14831 -406 Library0
HWI-ST0764:99:C0BV6ACXX:4:2107:4589:43565 83 1 15176 41 = 14914 -362 Library0
---------------------------------------------
1 15015 15143 128 2 3.00995 >Deletion_xxx_00000000<

HWI-ST0764:99:C0BV6ACXX:4:2301:8245:154739 83 1 16419 16 = 16094 -425 Library0
HWI-ST0764:99:C0BV6ACXX:4:1108:15472:66215 99 1 16249 15 = 16540 391 Library0
HWI-ST0764:99:C0BV6ACXX:4:1108:3056:153621 1123 1 16249 15 = 16558 391 Library0
---------------------------------------------
1 16350 16419 69 3 15.3084 >Deletion_xxx_00000001<

HWI-ST0764:99:C0BV6ACXX:4:2302:16721:121399 83 1 69682 12 = 69383 -399 Library0
HWI-ST0764:99:C0BV6ACXX:4:2204:19244:40995 83 1 69785 36 = 69523 -362 Library0
HWI-ST0764:99:C0BV6ACXX:4:1101:7617:39485 83 1 69797 29 = 69536 -361 Library0
---------------------------------------------
1 69637 69682 45 3 16.6685 >Deletion_xxx_00000002<

HWI-ST0764:99:C0BV6ACXX:4:1204:14771:27644 99 1 367948 0 = 368253 369 Library0
HWI-ST0764:99:C0BV6ACXX:4:2103:1214:124930 83 1 368340 0 = 368023 -417 Library0
---------------------------------------------
1 368124 368253 129 2 -0 >Deletion_xxx_00000003<

HWI-ST0764:99:C0BV6ACXX:4:2306:18464:168765 83 1 802031 57 = 801722 -403 Library0
HWI-ST0764:99:C0BV6ACXX:4:2202:17216:184485 99 1 801733 37 = 802023 369 Library0
HWI-ST0764:99:C0BV6ACXX:4:1102:11251:109896 83 1 802054 57 = 801737 -408 Library0
HWI-ST0764:99:C0BV6ACXX:4:2101:20094:111155 83 1 802052 57 = 801755 -397 Library0
HWI-ST0764:99:C0BV6ACXX:4:2304:14851:200592 83 1 802033 60 = 801771 -362 Library0
HWI-ST0764:99:C0BV6ACXX:4:2204:16036:62667 99 1 801789 37 = 802080 372 Library0
HWI-ST0764:99:C0BV6ACXX:4:1307:14444:68097 99 1 801800 57 = 802117 403 Library0
HWI-ST0764:99:C0BV6ACXX:4:2206:4525:22206 83 1 802136 0 = 801822 -399 Library0
HWI-ST0764:99:C0BV6ACXX:4:2106:3993:7815 83 1 802110 57 = 801830 -379 Library0
HWI-ST0764:99:C0BV6ACXX:4:1204:5671:93720 1107 1 802121 57 = 801830 -379 Library0
HWI-ST0764:99:C0BV6ACXX:4:1205:12390:55233 99 1 801835 37 = 802137 386 Library0
HWI-ST0764:99:C0BV6ACXX:4:2103:16357:92085 83 1 802136 7 = 801839 -390 Library0
HWI-ST0764:99:C0BV6ACXX:4:2306:16690:178455 83 1 802141 7 = 801847 -374 Library0
HWI-ST0764:99:C0BV6ACXX:4:2304:8284:19653 99 1 801852 37 = 802140 381 Library0
HWI-ST0764:99:C0BV6ACXX:4:2304:18678:164778 99 1 801853 37 = 802136 376 Library0
HWI-ST0764:99:C0BV6ACXX:4:2106:6319:57635 83 1 802150 5 = 801859 -387 Library0
HWI-ST0764:99:C0BV6ACXX:4:2304:5415:115448 99 1 801860 37 = 802143 382 Library0
---------------------------------------------
1 801961 802023 62 17 9.95808 >Deletion_xxx_00000004<

[mastal]

Extracting specific lines/rows with awk

How many different patterns/lines are you trying to extract?

Grep will also work:
$grep 'pattern' in.txt > out.txt

check
$grep --help

for the different options you can use with grep.

[rhinoceros]

You mean you need to extract lines that begin with '1'? If so,

grep '^1' file.txt > out.txt