linux常用设定及命令

• 修改ip地址：
  

  [root@localhost ~]# cat /etc/sysconfig/network-scripts/ifcfg-eth0
  DEVICE=eth0
  BOOTPROTO=none
  HWADDR=00:30:1B:46:F6:B4
  ONBOOT=yes
  TYPE=Ethernet
  NETMASK=255.255.255.0
  IPADDR=192.168.101.234
  USERCTL=no
  IPV6INIT=no
  PEERDNS=yes
  GATEWAY=192.168.101.252
  [root@localhost ~]# /etc/init.d/network restart

• 关闭firewall：
  

  [root@localhost ~]# /etc/init.d/iptables stop
  Flushing firewall rules:    [ OK ]
  Setting chains to policy ACCEPT: filter   [ OK ]
  Unloading iptables modules:  [ OK ]
  [root@localhost ~]# chkconfig iptables off

• 关掉SELINUX
  

  /etc/selinux/config
  SELINUX=enforcing -> SELINUX=Disabled

• service状态查询/启/停/重启
  

  service network status
  service network start
  service network stop
  service network restart

• 添加linux用户

  adduser -s /use/bsh -d /home/username -p password username
  -s指定sh，-d指定用户主目录,-p指定密码

• 显示硬盘空间

  du -sh ./*
  -s目录总和,-h用m为单位

• 显示所有用户列表

  cat /etc/passwd |cut -f 1 -d :