Ernest Ho Diary

awk command can split some strings with a specified field separator. The special variable FS (Field Separator) determines how awk will split up each record into fields.

For example, /etc/passwd has its fields separated by colons.

  awk -F: '{print $1:$3 }' /etc/passwd

This variable can actually be set to any regular expression, in the manner
of egrep(1).

Everyday, there are so many spam email to info@ernestho.com !!

It makes me crazy.