1、查看linux系统内核版本命令

[root@localhost ~]# uname -r

3.8.13-35.3.1.el7uek.x86_64

[root@localhost ~]# uname -a

Linux localhost.localdomain 3.8.13-35.3.1.el7uek.x86_64 #2 SMP Wed Jun 25 15:27:43 PDT 2014 x86_64 x86_64 x86_64 GNU/Linux

2、查看linux系统发行版本

[root@localhost ~]# cat /etc/redhat-release

Red Hat Enterprise Linux Server release 7.0 (Maipo)

[root@localhost ]# cat /etc/issue

Red Hat Enterprise Linux Server release 5.8 (Tikanga)

Kernel \r on an \m

3、查看linux系统具体版本号

[root@localhost ~]# cat /proc/version

Linux version 3.8.13-35.3.1.el7uek.x86_64 (mockbuild@ca-build56.us.oracle.com) (gcc version 4.8.2 20140120 (Red Hat 4.8.2-16) (GCC) ) #2 SMP Wed Jun 25 15:27:43 PDT 2014

4、查看Linux硬盘大小

[root@localhost ~]# df -lh

文件系统 容量 已用 可用 已用% 挂载点

/dev/mapper/ol-root 22G 7.2G 15G 33% /

devtmpfs 857M 0 857M 0% /dev

tmpfs 866M 84K 866M 1% /dev/shm

tmpfs 866M 9.0M 858M 2% /run

tmpfs 866M 0 866M 0% /sys/fs/cgroup

/dev/sda1 497M 143M 354M 29% /boot

/dev/sr0 3.9G 3.9G 0 100% /run/media/root/OL-7.0 Server.x86_64

5、查看内存大小

[root@localhost ~]# free -g

total used free shared buffers cached

Mem: 15 8 7 0 0 5

-/+ buffers/cache: 2 13

Swap: 17 0 17

You have new mail in /var/spool/mail/root

[root@localhost ~]# free -m

total used free shared buffers cached

Mem: 16049 8512 7537 0 198 5911

-/+ buffers/cache: 2401 13648

Swap: 18047 0 18047

查看内存占用百分比：

[root@rusky ~]# free -m | sed -n '2p' | awk '{print "used mem is "$3"M,total mem is "$2"M,used percent is "$3/$2*100"%"}'

used mem is 15765M,total mem is 15949M,used percent is 98.8463%

6、查看CPU个数

[root@localhost ]# ls /proc/acpi/processor/

CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 CPU6 CPU7

7、查看CPU详细信息

[root@YNCMldap195 /]# cat /proc/cpuinfo

processor : 0

vendor_id : AuthenticAMD

cpu family : 21

model : 2

model name : AMD Opteron(tm) Processor 6348

stepping : 0

cpu MHz : 2800.033

cache size : 2048 KB

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 syscall nx mmxext fxsr_opt rdtscp lm rep_good constant_tsc nonstop_tsc pni ssse3 cx16 sse4_1 sse4_2 popcnt lahf_lm extapic abm sse4a misalignsse 3dnowprefetch osvw xop fma4

bogomips : 5600.06

TLB size : 1536 4K pages

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management: [8]

processor : 1

vendor_id : AuthenticAMD

cpu family : 21

model : 2

model name : AMD Opteron(tm) Processor 6348

stepping : 0

cpu MHz : 2800.033

cache size : 2048 KB

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 syscall nx mmxext fxsr_opt rdtscp lm rep_good constant_tsc nonstop_tsc pni ssse3 cx16 sse4_1 sse4_2 popcnt lahf_lm extapic abm sse4a misalignsse 3dnowprefetch osvw xop fma4

bogomips : 5600.06

TLB size : 1536 4K pages

clflush size : 64

cache_alignment : 64

address sizes : 40 bits physical, 48 bits virtual

power management: [8]

……

processor : 7