View Linux system version and kernel information

Linux
View Linux system version information
1. View the kernel version
1) Method One: Log in to Linux execution cat/proc/version
[Email protected]_32bit_ip12 ~]$ cat/proc/version
Linux version 2.6.18-194.el5 ([email protected]) (GCC version 4.1.2 20080704 (Red Hat 4.1.2-48)) #1 SMP Fri APR 2 14:58:35 EDT 2010
2) Method Two: Log in to Linux execution uname-a
[Email protected]_32bit_ip12 cpp]$ uname-a
Linux centos5_32bit_ip12 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT. i686 i686 i386 Gnu/linux

3) method Three: Log in to Linux execution uname-r
[Email protected]_32bit_ip12 cpp]$ uname-r 2.6.18-194.el5

2. View Linux Versions
1) Method One: Log in to the server to perform lsb_release-a, and then list all the version information
[Email protected]_32bit_ip12 ~]$ lsb_release-a
LSB Version:: Core-3.1-ia32:core-3.1-noarch:graphics-3.1-ia32:graphics-3.1-noarch distributor Id:centos
Description:centos Release 5.5 (Final) release:5.5
Codename:final

2) Method Two: Log in to Linux execution cat/etc/issue
[Email protected]_32bit_ip12 ~]$ cat/etc/issue CentOS release 5.5 (Final) Kernel \ r on an \m

3) method Three: Log in to Linux execution cat/etc/redhat-release
[Email protected]_32bit_ip12 ~]$ cat/etc/redhat-release CentOS release 5.5 (Final)
3. Check whether the Linux machine is a 32-bit or 64-bit method
1) Method One: Log on to the Linux execution File/sbin/init or file/bin/ls
[Email protected]_32bit_ip12 ~]$ File/sbin/init
/sbin/init:elf 32-bit LSB executable, Intel 80386, version 1 (SYSV), for Gnu/linux 2.6.9, dynamically linked (uses shared LIBS), for Gnu/linux 2.6.9, stripped if realistic 32-bit, is represented as a 32-bit operating system
2) Method Two: Login to the Linux execution uname-a
[Email protected]s5_32bit_ip12 ~]$ uname-a
Linux centos5_32bit_ip12 2.6.18-194.el5 #1 SMP Fri Apr 2 14:58:35 EDT a i686 i686 i386 Gnu/linux i686 represents a 32-bit machine i686 just i386 A subset of the supported CPUs starting with Pentinum 2 (686) and previous models are not supported.
3) method Three: Login to the Linux execution getconf long_bit
Run commands on 32-bit machines and 64-bit machines 1) 32-bit machines
[[Email protected]_32bit_ip12 ~]$ getconf Long_bit 32
After executing the above command, direct output 32, expressed as 32-bit operating system
2) 64-bit machine
[[Email protected]_32bit_ip12 ~]$ getconf long_bit 64

After executing the above command, direct output 64, expressed as 64-bit operating system

Reference Document http://blog.csdn.net/zhuying_linux/article/details/6859286