awk '{print FNR "\t" $0}' dummy.txt*

awk '{print FNR "\t" $0}' dummy.txt*

awk '{printf("%5d : %s\n", NR,$0)}' dummy.txt

awk 'NF{$0=++a " :" $0};{print}' dummy.txt
awk '{print (NF? ++a " :" :"") $0}' dummy.txt

awk 'END{print NR}' dummy.txt

| Days | SSH Users | Offline | Idle Users | FTP Users
| Sat  | 231        | 53       | 12           | 435       
| Sun  | 874        | 13       | 849          | 56        
| Mon  | 837        | 339      | 4434         | 90        

دانلود این فایل

awk '{s=0; for (i=1; i<=NF; i++) s=s+$i; print s}' stats.txt

awk '{for (i=1; i<=NF; i++) s=s+$i}; END{print s}' stats.txt

awk '{for (i=1; i<=NF; i++) if ($i < 0) $i = -$i; print }'
awk '{for (i=1; i<=NF; i++) $i = ($i < 0) ? -$i : $i; print }'

awk '{ total = total + NF }; END {print total}' dummy.txt

awk '/Lorem/{n++}; END {print n+0}' dummy.txt

awk '{ print NF ":" $0 } ' dummy.txt

awk '{ print $NF }' dummy.txt

awk '{ field = $NF }; END{ print field }' dummy.txt

awk '{ print $1 }' dummy.txt

awk '{ print $4 }' dummy.txt

awk 'NF > 4' dummy.txt