[TriLUG] detecting kernel major/minor versions

[Benjamin Reed]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Joseph Mack NA3T wrote:

> uname_r=`uname -r`
> minor_and_subminor=${uname_r##*2.6.}
> minor=${minor_and_subminor%\.*}

Bash stuff works, although this will fail when 2.7 comes out...  <grin>

I generally use "cut" for such things, it tends to be more future-proof:

minor_and_subminor=`echo $uname_r | cut -d. -f3-`
minor=`echo $uname_r | cut -d. -f3`

- -d. means chop up the string on the "."s
- -f3 means display the 3rd entry in the chopped string
- -f3- means display the 3rd entry and anything afterwards

you could also do "-f3-4" to specifically ask for the 3rd through the 4th.


- --
Benjamin Reed a.k.a. Ranger Rick
http://ranger.befunk.com/


-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (Darwin)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFEoIPPUu+jZtP2Zf4RAmxrAJ0QKpYLt7al3ykSMk/2V2Vu8TDkbACcDZ/K
x1300Ph+L9f6lRYdRv/79yw=
=amGY
-----END PGP SIGNATURE-----