UNIX for Dummies Questions & Answers

pandeeswaran@ubuntu:~$ awk '1' file
PSAPSR3 3722000 91989.25 2 98
PSAPSR7 1562000 77000.1875 5 95
PSAPUNDO 92000 4087.5625 4 96
pandeeswaran@ubuntu:~$ awk '2' file
PSAPSR3 3722000 91989.25 2 98
PSAPSR7 1562000 77000.1875 5 95
PSAPUNDO 92000 4087.5625 4 96
pandeeswaran@ubuntu:~$ awk '0' file
pandeeswaran@ubuntu:~$ awk '3' file
PSAPSR3 3722000 91989.25 2 98
PSAPSR7 1562000 77000.1875 5 95
PSAPUNDO 92000 4087.5625 4 96

       A pattern-action statement has the form

              pattern { action }

       A missing { action } means print the line; a missing pattern always matches.  Pattern-action  statements
       are separated by newlines or semicolons.

1 == 1 { print }

1 { print }

{ print }

awk '-1==-1' file