how to selectively print version numbers from log files

craftereric · 04-21-2008, 09:45 AM

I have a series of log files in which I want to print version numbers (a.b.c.d) where a,b,c,d are integers. Once I find the pertinent line, is there a way to only print the version number from that line?

For example:
inputs:
2007-04-21 version 5.6.7.4 loading
Version 3.2.3.4 application

outputs:
5.6.7.4
3.2.3.4

I could use cut and sed but from the above examples the inputs are not consistent. I was looking for a more elegant way.

colucix · 04-21-2008, 10:02 AM

If the version number is always after the word Version or version (uppercase v) you can use awk like this

Code:

gawk '
/Version|version/ {
    for (i=1; i<=NF; i++)
      if ($i == "Version" || $i == "version")
        print $(i+1)
}' logfile