安装篇：
本教程应用环境为干净centos 5.5 ，预先分好并加载/data分区,并且关闭selinux及iptables
首先修改文件描述符并设定临时端口范围，这些设置重启后生效
cat >> /etc/security/limits.conf <<DDD
* soft nofile 8192
* hard nofile 20480
DDD
cat >> /etc/sysctl.conf <<DDD
#set temp port range
net.ipv4.ip_local_port_range = 32768 61000
DDD
init 6
确认修改是否正确
[root@sudutest ~]# ulimit -n
8192
[root@suduotest ~]# sysctl -n net.ipv4.ip_local_port_range
net.ipv4.ip_local_port_range = 32768 61000
添加squid专用账户
groupadd squid
useradd -g squid -s /bin/false -M squid
添加日志目录、设置缓存和日志目录的权限
mkdir /data/squidlog/
chown -R squid.squid /data
然后上传或者wget squid3.0软件tar包，tar zxvf解压，并且进入解压后的目录安装编译
./configure –prefix=/usr/local/squid3 –enable-async-io=100 –with-pthreads –enable-storeio=”aufs,diskd,ufs” –enable-removal-policies=”heap,lru” –enable-icmp –enable-delay-pools –enable-useragent-log –enable-referer-log –enable-kill-parent-hack –enable-arp-acl –enable-default-err-language=Simplify_Chinese –enable-err-languages=”Simplify_Chinese English” –disable-poll –disable-wccp –disable-wccpv2 –disable-ident-lookups –disable-internal-dns –enable-basic-auth-helpers=”NCSA” –enable-stacktrace –with-large-files –disable-mempools –with-filedescriptors=65535 –enable-ssl –enable-x-accelerator-var
make
make install
make install-pinger
至此squid已经成功安装了，然后大家自己所需的/usr/local/squid3/etc/squid.conf 配置文件，我这边的配置文件将会在
