从java检测linux发行版

Question

Is there a (preferably efficient, ie without executing binaries and parsing their outputs) way of detecting the Linux distribution in Java? As far as I know, System provides os.name , os.arch and os.version , which don't seem to help. For a typical Ubuntu installation they get these values:

os.name : amd64

os.arch : Linux

os.version : 3.19.0-28-generic

What I need is whether the it's debian based, redhat family or others.

Answer 1

I think parsing a file is the way to go under Linux. You could of course do it only once.

The correct file to find such information on Linux would be /etc/*-release , which on my machine gives the following output:

$ cat /etc/*-release                                                                                        
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.3 LTS"
NAME="Ubuntu"
VERSION="14.04.3 LTS, Trusty Tahr"
ID=ubuntu
ID_LIKE=debian
PRETTY_NAME="Ubuntu 14.04.3 LTS"
VERSION_ID="14.04"
HOME_URL="http://www.ubuntu.com/"
SUPPORT_URL="http://help.ubuntu.com/"
BUG_REPORT_URL="http://bugs.launchpad.net/ubuntu/"

You could then parse ID_LIKE variable which would give you the exact information you need (I can't guarantee that but I suppose it will always be in the 8th line on every Linux distribution).

Answer 2

You should read one of these files:

/etc/release
/etc/lsb-release

On a more recent distribution you will also find:

/etc/os-release