Shell Programming and Scripting

sort -k3nr input_file| awk '
NR==1 { max = $3 }
$3<max { exit }
1
'

 awk 'NR==1{next} $3==max{s=s"\n"$0} $3>max{max=$3;s=$0} END{print s}' infile

$ cat muay.sh
sort -k3nr muay.txt| awk '
NR==1 { max = $3 }
$3<max { exit }
1
'
$ cat muay.txt
1 bob 45
2 joe 89
3 sue 11
4 steve 33
5 averell 89
6 willian 89
7 lucky 9
8 jack 89
$ ./muay.sh
2 joe 89
5 averell 89
6 willian 89
8 jack 89
$

sort -t, -k3nr muay.txt| awk -F, '
NR==1 { max = $3 }
$3<max { exit }
1
'

awk -F, 'NR==1{next} $3==max{s=s"\n"$0} $3>max{max=$3;s=$0} END{print s}' infile

sort +2 -nr a.txt | awk 'NR==1{print;max=$3;}NR>1{if($3==max){print;}}'