bash - shell script sum in for loop not working - 


size=`ls -l /var/temp.* | awk '{ print $5}'`         fin_size=0         row in ${size} ;                                fin_size=`echo $(( $row + $fin_size )) | bc`;         done echo $fin_size

is not working !! echo $fin_size throwing garbage minus value. i'm mistaking? (my bash old , suppose work in linux kernel: 2.6.39)

below should enough:

ls -l /var/temp.*  | awk '{a+=$5}end{print a}'

no need run loop.this means:

size=ls -l /var/temp.* | awk '{ print $5}'`         fin_size=0         row in ${size} ;                                fin_size=`echo $(( $row + $fin_size )) | bc`;         done echo $fin_size

the whole above thing can replaced :

fin_size=`ls -l /var/temp.*  | awk '{a+=$5}end{printf("%10d",a);}'` echo $fin_size

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