1:uname

$ uname --helpUsage: uname [OPTION]...Print certain system information.  With no OPTION, same as -s.  -a, --all                print all information, in the following order,                             except omit -p and -i if unknown:  -s, --kernel-name        print the kernel name  -n, --nodename           print the network node hostname  -r, --kernel-release     print the kernel release  -v, --kernel-version     print the kernel version  -m, --machine            print the machine hardware name  -p, --processor          print the processor type or "unknown"  -i, --hardware-platform  print the hardware platform or "unknown"  -o, --operating-system   print the operating system      --help     display this help and exit      --version  output version information and exitGNU coreutils online help: <http://www.gnu.org/software/coreutils/>For complete documentation, run: info coreutils 'uname invocation'

罕用

# 显示所有$ uname -a  # 硬件平台$ uname -i  x86_64# 内核版本号$ uname -r3.10.0-229.el7.x86_64$ uname -v#1 SMP Fri Mar 6 11:36:42 UTC 2015

2：/proc/version

零碎运行内核版本号以及gcc版本号

$ cat /proc/version Linux version 3.10.0-229.el7.x86_64 (builder@kbuilder.dev.centos.org) (gcc version 4.8.2 20140120 (Red Hat 4.8.2-16) (GCC) ) #1 SMP Fri Mar 6 11:36:42 UTC 2015

3：/proc/cpuinfo

cpu 相干信息

$ cat /proc/cpuinfo processor    : 0vendor_id    : GenuineIntelcpu family    : 6model        : 94model name    : Intel(R) Core(TM) i5-6400 CPU @ 2.70GHzstepping    : 3cpu MHz        : 2711.952cache size    : 6144 KBphysical id    : 0siblings    : 1core id        : 0cpu cores    : 1apicid        : 0initial apicid    : 0fpu        : yesfpu_exception    : yescpuid level    : 22wp        : yesflags        : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc pni pclmulqdq monitor ssse3 cx16 pcid sse4_1 sse4_2 movbe popcnt aes xsave avx rdrand lahf_lm abm 3dnowprefetch fsgsbase avx2 invpcid rdseedbogomips    : 5423.90clflush size    : 64cache_alignment    : 64address sizes    : 39 bits physical, 48 bits virtualpower management:

常见命令

# 查看物理cpu个数$ cat /proc/cpuinfo| grep "physical id" |sort | uniq | wc -l4
# 查看每个物理cpu的核数$ cat /proc/cpuinfo| grep "cpu cores"| uniqcpu cores    : 1
# 查看逻辑cpu个数$ cat /proc/cpuinfo| grep "processor"| wc -l4

4: lscpu

Display information about the CPU architecture.

lscpu从sysfs和/proc/cpuinfo收集cpu体系结构信息，命令的输入比拟易读

$ lscpu Architecture:          x86_64CPU op-mode(s):        32-bit, 64-bitByte Order:            Little EndianCPU(s):                1On-line CPU(s) list:   0Thread(s) per core:    1Core(s) per socket:    1Socket(s):             1NUMA node(s):          1Vendor ID:             GenuineIntelCPU family:            6Model:                 94Model name:            Intel(R) Core(TM) i5-6400 CPU @ 2.70GHzStepping:              3CPU MHz:               2711.952BogoMIPS:              5423.90Hypervisor vendor:     OracleVirtualization type:   fullL1d cache:             32KL1i cache:             32KL2 cache:              256KL3 cache:              6144KNUMA node0 CPU(s):     0Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 syscall nx rdtscp lm constant_tsc rep_good nopl xtopology nonstop_tsc pni pclmulqdq monitor ssse3 cx16 pcid sse4_1 sse4_2 movbe popcnt aes xsave avx rdrand lahf_lm abm 3dnowprefetch fsgsbase avx2 invpcid rdseed

5: /proc/meminfo

零碎内存应用情况

free和vmstat等命令返回数据均来自该文件

具体介绍 参考这里

6: free

Display amount of free and used memory in the system

$ free -h              total        used        free      shared  buff/cache   availableMem:           3.7G        119M        3.3G        8.5M        296M        3.4GSwap:          2.0G          0B        2.0G

7:/proc/uptime 和 /proc/loadavg

零碎运行工夫和空间工夫 单位s

(闲暇工夫可能会是运行工夫的几倍 因为闲暇工夫是所有逻辑cpu的闲暇工夫和)

$cat /proc/uptime 70642.00 282514.43
$ cat /proc/loadavg 0.00 0.01 0.05 1/170 15387

8：uptime

$ uptime  15:22:35 up 19:41,  1 user,  load average: 0.00, 0.01, 0.05

别离示意

  • 以后工夫 15:22:35
  • 零碎曾经运行工夫 19:41 19小时41分
  • 以后在线用户数 1个用户
  • 零碎负载 1分钟 5分钟 15分钟平均值

9：查看零碎发行版

/etc/os-release
$ cat /etc/os-releaseNAME="CentOS Linux"VERSION="7 (Core)"ID="centos"ID_LIKE="rhel fedora"VERSION_ID="7"PRETTY_NAME="CentOS Linux 7 (Core)"ANSI_COLOR="0;31"CPE_NAME="cpe:/o:centos:centos:7"HOME_URL="https://www.centos.org/"BUG_REPORT_URL="https://bugs.centos.org/"CENTOS_MANTISBT_PROJECT="CentOS-7"CENTOS_MANTISBT_PROJECT_VERSION="7"REDHAT_SUPPORT_PRODUCT="centos"REDHAT_SUPPORT_PRODUCT_VERSION="7"

lsb_release

$ lsb_release -rRelease:    7.2.1511

该命令默认没有被装置 须要自行装置

/etc/issue

hostnamectl

$ hostnamectl   Static hostname: localhost.localdomain         Icon name: computer-vm           Chassis: vm        Machine ID: 15ef07d6ca494a7f82fec477fa70b7e4           Boot ID: 1b607797966a487b8b72944f0ce619c2    Virtualization: vmware  Operating System: CentOS Linux 7 (Core)       CPE OS Name: cpe:/o:centos:centos:7            Kernel: Linux 3.10.0-327.el7.x86_64      Architecture: x86-64