> I have a question about licences. > > > > I have just read in FAQ question that SL has a GPL license. Do anybody > > know witch version of license is? 1, 2 or 3? > > I think this is depending on which package you are asking for. The Linux > Kernel itself e.g. is GPLv2 only. Indeed, if you query the packages, rpm will show you the license information (and they're not all the same): $ rpm -qi coreutils Name : coreutils Relocations: (not relocatable) Version : 8.4 Vendor: Scientific Linux Release : 9.el6 Build Date: Wed 24 Nov 2010 05:54:05 PM EST Install Date: Tue 10 May 2011 10:03:59 AM EDT Build Host: sl6.fnal.gov Group : System Environment/Base Source RPM: coreutils-8.4-9.el6.src.rpm Size : 12626757 License: GPLv3+ <=========================* Signature : DSA/SHA1, Thu 25 Nov 2010 01:07:39 PM EST, Key ID b0b4183f192a7d7d Packager : Koji URL : http://www.gnu.org/software/coreutils/ Summary : A set of basic GNU tools commonly used in shell scripts Description : These are the GNU core utilities. This package is the combination of the old GNU fileutils, sh-utils, and textutils packages. $ rpm -qi kernel Name : kernel Relocations: (not relocatable) Version : 2.6.32 Vendor: Scientific Linux Release : 71.24.1.el6 Build Date: Fri 08 Apr 2011 02:46:56 AM EDT Install Date: Tue 10 May 2011 03:06:45 PM EDT Build Host: sl6.fnal.gov Group : System Environment/Kernel Source RPM: kernel-2.6.32-71.24.1.el6.src.rpm Size : 89548610 License: GPLv2 <============================* Signature : DSA/SHA1, Fri 08 Apr 2011 03:46:59 PM EDT, Key ID b0b4183f192a7d7d Packager : Scientific Linux URL : http://www.kernel.org/ Summary : The Linux kernel Description : The kernel package contains the Linux kernel (vmlinuz), the core of any Linux operating system. The kernel handles the basic functions of the operating system: memory allocation, process allocation, device input and output, etc. $ - Bluejay Adametz "As long as you keep a person down, some part of you has to be down there to hold him down, so it means you cannot soar as you otherwise might." - Marian Anderson NOTICE: This message, including any attachments, is only for the use of the intended recipient(s) and may contain confidential and privileged information, or information otherwise protected from disclosure by law. If the reader of this message is not the intended recipient, you are hereby notified that any use, disclosure, copying, dissemination or distribution of this message or any of its attachments is strictly prohibited. If you received this message in error, please contact the sender immediately by reply email and destroy this message, including all attachments, and any copies thereof.