Shell Programming and Scripting

echo "a|b|c|d|test|123|same" | awk 'BEGIN {FS=OFS="|"} {print $1,$2,$7,$4,$5,$6}'

a|b|same|d|test|123

echo "a|b|c|d|test|123|same" | awk 'BEGIN {FS=OFS="|"} { $3=$NF;NF--;print }'

 
awk -F\| '{$2=$2"|"$NF;for(i=1;i<NF;i++){if(i==NF-1){printf("%s\n",$i)}else{printf("%s|",$i)}}}'

echo "a|b|c|d|test|123|same" | awk 'BEGIN {FS=OFS="|"} { $3=$NF;NF--;print }'

input	value of NF
a|b|c|d	4
a|b|c	3
a|b	2

awk -F\| '{$2=$2"|"$NF;for(i=1;i<NF;i++){if(i==NF-1){printf("%s\n",$i)}else{printf("%s|",$i)}}}'

 
$2=$2"|"$NF; # replacing the $2 value with $2 + "|" + $NF (last column value)
For loop # to print all the values except last value ( condition is i < NF)