# cat /proc/version

Linux version 2.6.18-348.el5 (mockbuild@x86-002.build.bos.redhat.com) (gcc version 4.1.2 20080704 (Red Hat 4.1.2-54)) #1 SMP Wed Nov 

 

详细解释：

The GNU Compiler Collection (GCC) is a compiler system produced by the GNU Project supporting various programming languages. 

GNU is a recursive acronym meaning "GNU's not Unix".

A symmetric multiprocessor system (SMP) is a multiprocessor system with centralized shared memory called main memory (MM) operating under a single operating system with two or more homogeneous processors—i.e., it is not a heterogeneous computing system.

 

# cat /etc/issue

[root@INTG ~]# cat /etc/issueCentOS release 6.5 (Final)Kernel \r on an \m

 

#cat /etc/redhat-release

CentOS Linux release 7.3.1611 (Core)