查看linux服务器的版本信息

• 查看linux系统信息
  uname -a
  Linux localhost.localdomain 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
• 输出内容分析：

uname --help / uname -h
  -a, --all                print all information, in thefollowing 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     

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• uname -s 内核名称
  Linux
• uname -n 节点名称
  localhost.localdomain
• uname -r 内核的发型号
  3.10.0-693.el7.x86_64
• uname -v 内核版本
  #1 SMP Tue Aug 22 21:09:27 UTC 2017
• uname -m 机器硬件名称
  x86_64
• uname -p 处理器类型
  x86_64
• uname -i 硬件平台
  x86_64
• uname -O 操作系统
  GNU/Linux
• 查看linux时Centos还是ubuntu
  执行lsb_release -a 命令存在表示为ubuntu系统
cat /etc/redhat-release 文件存在为centos