awk filter & print

Kropotkin · 12-01-2014, 08:42 AM

Hello,

I am doing something that must be pretty basic in awk: I would like to select all lines from a file in which the second field is a given number, ie 30 (the day of the month):

Code:

$ cat /var/log/messages | awk  '{$2 ~/30/; print $0}'

This doesn't work. What am I missing?

pan64 · 12-01-2014, 08:52 AM

What are you missing? ..... You need to learn the usage/syntax of awk:
awk '$2 == 30' /var/log/messages
(yes, cat is not required at all)