Linux命令 查看Linux版本和是否联网

1.查看Linux内核版本
1.1 $ cat /proc/version
[heima01@heima01 ~]$ cat /proc/version
Linux version 2.6.32-573.el6.i686 (mockbuild@c6b9.bsys.dev.centos.org) (gcc version 4.4.7 20120313 (Red Hat 4.4.7-16) (GCC) ) #1 SMP Thu Jul 23 12:37:35 UTC 2015[root@frxx ~]# cat /proc/version
Linux version 3.10.0-957.1.3.el7.x86_64 (mockbuild@kbuilder.bsys.centos.org) (gcc version 4.8.5 20150623 (Red Hat 4.8.5-36) (GCC) ) #1 SMP Thu Nov 29 14:49:43 UTC 20181.2 $ uname -a
解释：x86_64表示Linux是64位版本的，i686 i386表示是32位版本的。
[heima01@heima01 ~]$ uname -a
Linux heima01 2.6.32-573.el6.i686 #1 SMP Thu Jul 23 12:37:35 UTC 2015 i686 i686 i386 GNU/Linux[root@frxx ~]# uname -a
Linux frxx 3.10.0-957.1.3.el7.x86_64 #1 SMP Thu Nov 29 14:49:43 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux1.3 $ uname -r
[heima01@heima01 ~]$ uname -r
2.6.32-573.el6.i686[root@frxx ~]# uname -r
3.10.0-957.1.3.el7.x86_642.查看Linux发行版本
2.1 $ lsb_release -a
[heima01@heima01 ~]$ lsb_release -a
LSB Version::base-4.0-ia32:base-4.0-noarch:core-4.0-ia32:core-4.0-noarch:graphics-4.0-ia32:graphics-4.0-noarch:printing-4.0-ia32:printing-4.0-noarch
Distributor ID:CentOS
Description:CentOS release 6.7 (Final)
Release:6.7
Codename:Final2.2 $ cat /etc/issue
[heima01@heima01 ~]$ cat /etc/issue
CentOS release 6.7 (Final)
Kernel \r on an \m2.3 $ cat /etc/redhat-release
$ cat /etc/*release*
[heima01@heima01 ~]$ cat /etc/redhat-release
CentOS release 6.7 (Final)[heima01@heima01 ~]$ cat /etc/*release*
CentOS release 6.7 (Final)
LSB_VERSION=base-4.0-ia32:base-4.0-noarch:core-4.0-ia32:core-4.0-noarch:graphics-4.0-ia32:graphics-4.0-noarch:printing-4.0-ia32:printing-4.0-noarch
cat: /etc/lsb-release.d: Is a directory
CentOS release 6.7 (Final)
CentOS release 6.7 (Final)
cpe:/o:centos:linux:6:GA
2.4 $ rpm -qi centos-release

[root@localhost ~]# rpm -qi centos-release
Name : centos-release
Version : 7
Release : 5.1804.el7.centos
Architecture: x86_64
Install Date: Wed 17 Jul 2019 05:33:06 PM CST
Group : System Environment/Base
Size : 40173
License : GPLv2
Signature : RSA/SHA256, Tue 01 May 2018 12:17:56 AM CST, Key ID 24c6a8a7f4a80eb5
Source RPM : centos-release-7-5.1804.el7.centos.src.rpm
Build Date : Sun 29 Apr 2018 12:35:55 AM CST
Build Host : x86-01.bsys.centos.org
Relocations : (not relocatable)
Packager : CentOS BuildSystem <http://bugs.centos.org>
Vendor : CentOS
Summary : CentOS Linux release file
Description :
CentOS Linux release files

3.查看是否联网
$ ping www.baidu.com
使用：
因为使用yum工具安装软件可能需要网络。1.没有联网
[heima01@heima01 ~]$ ping www.baidu.com
PING www.a.shifen.com (182.61.200.6) 56(84) bytes of data.
^Z
[2]+ Stopped ping www.baidu.com
2.已经联网
[root@instance-fjii60o3 ~]# ping www.baidu.com
PING www.a.shifen.com (220.181.38.150) 56(84) bytes of data.
64 bytes from 220.181.38.150 (220.181.38.150): icmp_seq=1 ttl=53 time=3.69 ms
64 bytes from 220.181.38.150 (220.181.38.150): icmp_seq=2 ttl=53 time=3.50 ms
64 bytes from 220.181.38.150 (220.181.38.150): icmp_seq=3 ttl=53 time=3.66 ms4.查看CPU信息
# cat /proc/cpuinfo[root@frxx ~]# cat /proc/cpuinfo
processor: 0
vendor_id: GenuineIntel
cpu family: 6
model: 85
model name: Intel(R) Xeon(R) Gold 6148 CPU @ 2.40GHz
stepping: 4
microcode: 0x1
cpu MHz: 2399.996
cache size: 28160 KB
physical id: 0
siblings: 1
core id: 0
cpu cores: 1
apicid: 0
initial apicid: 0
fpu: yes
fpu_exception: yes
cpuid level: 13
wp: yes
flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ibrs ibpb fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f rdseed adx smap clflushopt clwb avx512cd xsaveopt xsavec xgetbv1 arat spec_ctrl
bogomips: 4799.99
clflush size: 64
cache_alignment: 64
address sizes: 40 bits physical, 48 bits virtual
power management:[root@heima01 heima01]# cat /proc/cpuinfo
processor: 0
vendor_id: GenuineIntel
cpu family: 6
model: 158
model name: Intel(R) Core(TM) i5-7300HQ CPU @ 2.50GHz
stepping: 9
microcode: 142
cpu MHz: 2496.002
cache size: 6144 KB
physical id: 0
siblings: 1
core id: 0
cpu cores: 1
apicid: 0
initial apicid: 0
fdiv_bug: no
hlt_bug: no
f00f_bug: no
coma_bug: no
fpu: yes
fpu_exception: yes
cpuid level: 22
wp: yes
flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss nx pdpe1gb rdtscp lm constant_tsc up arch_perfmon xtopology tsc_reliable nonstop_tsc unfair_spinlock pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch arat xsaveopt fsgsbase bmi1 avx2 smep bmi2 invpcid rdseed adx
bogomips: 4992.00
clflush size: 64
cache_alignment: 64
address sizes: 43 bits physical, 48 bits virtual
power management:5.查看Linux操作系统位数
$ getconf LONG_BIT[heima01@heima01 ~]$ getconf LONG_BIT
32
[root@frxx ~]# getconf LONG_BIT
64