awk 'BEGIN {FS="\t"; OFS="\t"} {print $2, $3, $4, $1}' input.txt > output.txt
FS and OFS specify the input/output separator
awk 'BEGIN {FS="\t"; OFS="\t"} {print $2, $3, $4, $1}' input.txt > output.txt
FS and OFS specify the input/output separator