awk

command – awk ‘{print $1}’ 

cat dog horse

              lion tiger bear

The output of the same command is   cat

                                                        lion

myFile contains data separated by a : e.g. cat:dog:horse

awk –F “:” ‘{print $1}’ myFile.

will print as normal again

ls –l | awk '{print $9}'

                                    file1

                                    file2

                                    file3    etc.

will print file names

ls –l | awk '{bytes += $5; print $9 "  " $5 " "$3 " Total " bytes " bytes"}'

implement something once at the start or end of the command. For example:

ls –l |awk '

{bytes += $5;

print $9 "  " $5 " " $3}’

END{print "Total " ttl " bytes"}'

ls –l | awk '

BEGIN{print"Directory Listing"}

{print $9 " "$5}'

ignoring lines

ls –l | awk '

BEGIN{print " Directory Listing"}

{if($1 == "total") next;

print $9}

END{print "Thank you and Goodbye"}'