perl syntax for using awk

options:

n - only prints the lines you tell it to
a - autosplit mode into @F
F - pattern to split on in this case a regexp ("/\s/" spilt on a space)
e - evaluate whats in quotes as code

code:

$. is the input record line number
$F[1] is the second field (or column) of @F (perl uses zero based arrays)

Thank you very much...
But when it is executed following error message is seen.Please can u tell me where i am doing wrong.

Error message :
.

What Kevin has posted is a perl one-liner which you can run directly in the terminal as you do with your awk command. No need of the script file.
All you need to do is type the entire command in terminal and press 'ENTER'.

What Kevin has posted is a perl one-liner which you can run directly in the terminal as you do with your awk command. No need of the script file.
All you need to do is type the entire command in terminal and press 'ENTER'.

However, if you want to use it inside script:

However, if you want to use it inside script:

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1. #!/usr/bin/perl -w
2. $command='perl -naF/\s/ -e "$.==2 && print $F[1]" input.txt';
3. $value = `$command`;
4. print "$value";
5.  

Is there any bound on spaces like there should be only one space between each field? because when input file has value in same row but little placed apart like
1 1132 aaaa vvvv
2 1123 bbbb 222 etert
3 1121 ssad 323 hfgh
4 2222 asda 232

i am not getting values when it is placed after few spaces

Is there any bound on spaces like there should be only one space between each field? because when input file has value in same row but little placed apart like
1 1132 aaaa vvvv
2 1123 bbbb 222 etert
3 1121 ssad 323 hfgh
4 2222 asda 232

i am not getting values when it is placed after few spaces

use:
\s+ will look for one or more spaces.

-Nithin

use:

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1. perl -naF/\s+/ -e "$.==2 && print $F[1]" input.txt
2.  

\s+ will look for one or more spaces.

-Nithin

Is there any method to increment the input record line number automatically.
I require all the values in 2nd field
I am stuck up with this please anyone help me

Is there any method to increment the input record line number automatically.
for($i=0;i<=5;i ++)
{
$command='perl -naF/\s+/ -e "$.=='$i' && print $F[4]" input.txt';
$value = `$command`;
print "$value";
}

1 1132 aaaa vvvv
2 1123 bbbb 222 etert
3 1121 ssad 323 hfgh
4 2222 asda 232

I require all the values in 2nd field
1132
1123
1121
2222
I am stuck up with this please anyone help me

Well, I thought you want a command line like with AWK, there is no sense in writing a one liner you run with backtiks, just do it all in the same script:

If you wanted all the second column values you should have said that in your first post.

Well, I thought you want a command line like with AWK, there is no sense in writing a one liner you run with backtiks, just do it all in the same script:

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1. open(IN,'input.txt') or die "$!";
2. while (<IN>) {
3.    print +(split/\s+/)[1],"\n";
4. }
5. close IN;
6.  

If you wanted all the second column values you should have said that in your first post.

No actually what i needed is script has to go 1st line 1std filed, take that value ,need to do some operations like pass that value into netsnmp command then increment by itself to 2nd line and take the value in 2nd field substitute in the netsnmp command ....please this is my main intention i thought i give example of simple file and try on my own applying it to what i want..
my input file looks like this...

11713000 1.3.6.1.4.1.253 .8.63.11.1100.1 .2 5
11610000 1.3.6.1.4.1.253 .8.63.11.1100.2 .1 5
11620000 1.3.6.1.4.1.253 .8.63.11.1100.2 .2 5
11630000 1.3.6.1.4.1.253 .8.63.11.1100.2 .3 8