UNIX for Dummies Questions & Answers

Hi Thomas,

I want to remove duplicates which are specified explicitely rather than all duplicates.
Thanks Thomas.

Hi Anbu,

I am getting the same error message. Can you take up my example and change the script accordingly.
Thanks in advance.

gops

Code:

#!/bin/ksh

awk -v check_val="$1" '{
        if( $0==check_val) { key[$0]++ }
        if(key[$0] < 2 ) print $0
       }' inputfile > outputfile

Hi Anbu,

I was off for few days and hence the delay in replying.
I tried your stuff but I am getting this error
awk -v check_val="$1" '{
if( $0==check_val) { key[$0]++ }
if(key[$0] < 2 ) print $0
}' inputfile > outputfile

awk: syntax error near line 1
awk: bailing out near line 1

I created a script test and fired it like ksh test.ksh cattle

I am using korn shell. Do i need to make some changes for that ?

Thanks in advance.

cheers,
gops

Hi Guys,

It is working fine when i supstitute nawk with awk command. Anbu, thanks a lot.

When i pass the exact string that line gets deleted in the outputfile.

But i want to pass a part of the string and i want whole string to be deleted.

for eg

inputfile

cattle
battle
cat
mattle
cattle

my outputfile should be
cattle
battle
mattle

here i want to check for cat%. I dont know how to do that using nawk.
Please help me out on this.

Best Regards,
gops

umm..how abt this?

awk '/$1/' inputfile>temp

awk '{for ( $0 in `cat temp` )
key[$0]++
if(key[$0] < 2 ) print $0
}' inputfile > outputfile


i didnt try this out, but i hope the logic is clear. i searched for the pattern specified by $1 and stored all the matches in temp. then instead of a direct comparison with 'if', i matched $0 with all the values in temp using a for loop. rest of the logic is the same. pardon any syntactical errors.

Hi npolayan,

I can able to create the temp file with appropriate values to look at but when i executed the awk statement
awk '{ for ($0 in `cat temp`)
key[$0]++
if(key[$0] < 2 ) print $0
}' inputfile > outputfile

I am getting error messages

illegal statement at source line 1
illegal statement at source line 4

Let me know if you have the answer.

Thanks in advance.

cheers,
gops