准备空机器

镜像

CentOS-6.5-x86_64-minimal.iso

• 官网仔细找能找到这个镜像地址

网络

DEVICE=eth0
#HWADDR=00:0C:29:13:29:63
TYPE=Ethernet
#UUID=60f4b40a-c9bf-4e06-a024-849c086502fa
ONBOOT=yes
NM_CONTROLLED=yes
# static
BOOTPROTO=static
# IP
IPADDR=192.168.48.21
# 网关
GATEWAY=192.168.48.2
# 阿里云DNS
DNS1=223.5.5.5

# 如果是克隆来的机器 
rm -rf /etc/udev/rules.d/70-persistent-net.rules

防火墙

# 停止
service iptables stop
# 开机禁止启动
chkconfig iptables off

hostname

vim /etc/sysconfig/network

修改源

cd /etc/yum.repos.d/
# 替换yum源
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo 
yum makecache

安装man

# 神器
yum install -y man man-pages

关闭selinux

• vim /etc/selinux/config

ntp

• yum install -y ntp

系统调用调用

man 命令用起来

socket

• socket() creates an endpoint for communication and returns a descriptor.返回了一个文件描述符。

select

• select() and pselect() allow a program to monitor multiple file descriptors, waiting until one or more of the file descriptors become "ready" for some class of I/O operation (e.g., input possible). A file descriptor is considered ready if it is possible to perform the corresponding I/O oper- ation (e.g., read(2)) without blocking.