second line of the file


 
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# 1  
Old 11-06-2008
second line of the file

Im trying to get the frist two line of a file as a variables.

Code:
input file 
/tmp/tmp.txt

1226037463l
1226037422ll


while read -r LINE
do
        if [ $start=0 ];
        then
        FRIST=`echo $LINE | awk -F"|" 'NR==1''{print $1}'`
        echo $FRIST
        SECOND=`echo $LINE | awk -F"|" 'NR==2''{print $1}'`
        echo $SECOND
done < /tmp/temp.txt

But the output is only 
1226037463l


Only the frist line is stored in FRIST .. the SECOND is empty.

Where I m I going wrong ?

Last edited by tayyabq8; 11-06-2008 at 05:26 AM.. Reason: Added code tags
# 2  
Old 11-06-2008
sorry fi is missing
# 3  
Old 11-06-2008
Code:
while read -r LINE
do
if [ $start=0 ];
then
FRIST=`echo $LINE | awk -F"|" 'NR==1''{print $1}'`
echo $FRIST
SECOND=`echo $LINE | awk -F"|" 'NR==2''{print $1}'`
echo $SECOND
fi
done < /tmp/temp.txt

I'm pretty new to shell scripting.. can any one help

Last edited by tayyabq8; 11-06-2008 at 05:27 AM.. Reason: Added code tags
# 4  
Old 11-06-2008
OK I got it

Code:
FRIST=`echo | awk 'NR==1 {print;exit}' /tmp/temp.txt`
echo $FRIST
SECOND=`echo | awk 'NR==2 {print;exit}' /tmp/temp.txt`
echo $SECOND


But Can I convert these variables to integer and do arthematic operations ??

Last edited by tayyabq8; 11-06-2008 at 05:27 AM.. Reason: Added code tags
# 5  
Old 11-06-2008
Code:
FIRST=`awk 'BEGIN{FS="|";OFS=" "}NR==1{print $1}' /temp/temp.txt`
SECOND=`awk 'BEGIN{FS="|";OFS=" "}NR==2{print $1}' /temp/temp.txt`


Last edited by tayyabq8; 11-06-2008 at 05:28 AM.. Reason: Added code tags
# 6  
Old 11-06-2008
Im not able to perform arthematic operation on these ..

Code:
FRIST VALUE IS 1226045443l
SECOND VALUE IS 1226045402l

Error Im getting 

expr: non-numeric argument


my code 

str= `expr $FRIST + $SECOND`
echo $str

I tried below also

str= `expr $FRIST + $SECOND | bc -l`
echo $str


Last edited by tayyabq8; 11-06-2008 at 05:29 AM.. Reason: Added code tags
# 7  
Old 11-06-2008
Code:
#! /bin/bash

FIRST=`awk 'BEGIN{FS="|";OFS=" "}NR==1{print $1}' /temp/temp.txt` 
# NOT     FIRST=1226045443l     BUT    FIRST=1226045443
SECOND=`awk 'BEGIN{FS="|";OFS=" "}NR==2{print $1}' /temp/temp.txt`
# NOT     SECOND=1226045402l     BUT     SECOND=1226045402

((str=$FIRST+$SECOND))  #or str=$((FIRST+SECOND))
echo $str

or
Code:
#! /bin/bash

FIRST=`awk 'BEGIN{FS="|";OFS=" "}NR==1{print $1}' /temp/temp.txt`
SECOND=`awk 'BEGIN{FS="|";OFS=" "}NR==2{print $1}' /temp/temp.txt`

let str=$FIRST+$SECOND
echo $str


Last edited by lifegeek; 11-06-2008 at 04:56 AM..
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