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grep second word in a file

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# 1  
Old 05-18-2009
grep second word in a file
How do I match second word and then print that line to output

For eg: My file has following text and I want to check if second word is n then I want to print entire line .

xytxti8naclip y
xytxt32bpsimple y
xytxt32bpna n
xytxti16nae y
xysmps32bpp031_bst n
xyslm32simple y

Can any one help here ?
# 2  
Old 05-18-2009
If these are real examples and the second word is also the last word in the line then you can do:

Code:
$ grep " n$" file

That is only look for lines with an "n" with a space in front of it and an end of line after it, does that help?
# 3  
Old 05-18-2009
that is sufficient but, it gives an error

filc20092> grep " n$\" filename
Illegal variable name.
filc20092>
# 4  
Old 05-18-2009
Mine is c shell not Bourne Shell
# 5  
Old 05-18-2009
grep n\$ infile
# 6  
Old 05-18-2009
Also, that just gets a line that ends in "n". If you really want the second word, you could do:

Code:
#!/usr/bin/perl
my $infile="infile";
open (INFILE,"<$infile");

while (<INFILE>) {
        chomp($_);
         @words=split(/ /,$_);
        if ($words[1] =~ /n$/) {
                print $words[0] . " " . $words[1] . "\n";
        }
}

Or something similar (that was off the cuff, I'd be surprised if it ran.)
# 7  
Old 05-18-2009
Quote:
Originally Posted by pitagi
that is sufficient but, it gives an error

filc20092> grep " n$\" filename
Illegal variable name.
filc20092>
Where has the backslash come from, that is what is causing the error?

Code:
$ cat /tmp/greptest
xytxti8naclip y
xytxt32bpsimple y
xytxt32bpna n
xytxti16nae y
xysmps32bpp031_bst n
xyslm32simple y
$ grep " n$" /tmp/greptest
xytxt32bpna n
xysmps32bpp031_bst n
$
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