服务器那些事儿

服务器那些事儿

查看信息

Linux下查看系统信息

# uname --help
Usage: 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 (non-portable)
  -i, --hardware-platform  print the hardware platform (non-portable)
  -o, --operating-system   print the operating system
      --help     display this help and exit
      --version  output version information and exit

# uname -s	核心
Linux

root@iZbp1hxtmn3a1etzuczekrZ:/# uname -n	网络节点主机名称
iZbp1hxtmn3a1etzuczekrZ

# uname -r	内核发行版
4.4.0-146-generic

# uname -v	内核版本
#172-Ubuntu SMP Wed Apr 3 09:00:08 UTC 2019

# 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

查看内核版本、系统信息(常用三种办法)

# uname -a
Linux iZbp1hxtmn3a1etzuczekrZ 4.4.0-146-generic #172-Ubuntu SMP Wed Apr 3 09:00:08 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
root@iZbp1hxtmn3a1etzuczekrZ:/# more /etc/issue
Ubuntu 16.04.6 LTS \n \l

# more /proc/version
Linux version 4.4.0-146-generic (buildd@lcy01-amd64-025) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.10) ) #172-Ubuntu SMP Wed Apr 3
 09:00:08 UTC 2019
 
# cat /proc/version
Linux version 4.4.0-146-generic (buildd@lcy01-amd64-025) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.10) ) #172-Ubuntu SMP Wed Apr 3 09:00:08 UTC 2019

查看apache2

# apache2 -version
Server version: Apache/2.4.18 (Ubuntu)
Server built:   2019-04-03T13:34:47

# apache2 -v
Server version: Apache/2.4.18 (Ubuntu)
Server built:   2019-04-03T13:34:47

查看php

# php -version
PHP 7.0.33-0ubuntu0.16.04.5 (cli) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.0.33-0ubuntu0.16.04.5, Copyright (c) 1999-2017, by Zend Technologies
    
# php -v
PHP 7.0.33-0ubuntu0.16.04.5 (cli) ( NTS )
Copyright (c) 1997-2017 The PHP Group
Zend Engine v3.0.0, Copyright (c) 1998-2017 Zend Technologies
    with Zend OPcache v7.0.33-0ubuntu0.16.04.5, Copyright (c) 1999-2017, by Zend Technologies

查看Mysql

注意：V大写

# mysql -V
mysql  Ver 14.14 Distrib 5.7.26, for Linux (x86_64) using  EditLine wrapper

# mysql -Version
mysql  Ver 14.14 Distrib 5.7.26, for Linux (x86_64) using  EditLine wrapper

查看redis

# redis-server --version
Redis server v=3.0.6 sha=00000000:0 malloc=jemalloc-3.6.0 bits=64 build=28b6715d3583bf8e

# redis-cli -v
redis-cli 3.0.6

安装

Ubuntu 下安装redis

$sudo apt-get update
$sudo apt-get install redis-server

清屏

第一种：
	# clear

第二种
	ctrl+l(键盘操作)
	
以上命令会刷新屏幕，本质上只是让终端显示页向后翻了一页，如果向上滚动屏幕还可以看到之前的操作信息

第三种：
	# reset
该命令将完全刷新终端屏幕，之前的终端输入操作信息将都会被清空