'Sort' command #6 Discussions | Linux Shell | HackerRank
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    !/bin/bash

    rm file.txt > stdout.txt 2> stderr.txt while IFS= read -r line || [ -n "line" >> file.txt done

    -n sort numeric

    -k column sort

    -t seperator type

    sort -n -k2 -t$'\t'< file.txt