# Squid

## 安装

```
yum -y install squid
```

安装的版本为

```
squid.x86_64 7:3.5.20-2.el7_3.3 @updates
```

## 配置

* /etc/squid/squid.conf

用如下两行覆盖

```
http_port 3128 # 如果只监听ipv4，则该行设为 http_port 0.0.0.0:3128
http_access allow all
```

* /usr/lib/systemd/system/squid.service

```
[Unit]
Description=Squid caching proxy
After=syslog.target network.target nss-lookup.target

[Service]
Type=forking
LimitNOFILE=16384
EnvironmentFile=/etc/sysconfig/squid
ExecStartPre=/usr/libexec/squid/cache_swap.sh
ExecStart=/usr/sbin/squid $SQUID_OPTS -f $SQUID_CONF
ExecReload=/usr/sbin/squid $SQUID_OPTS -k reconfigure -f $SQUID_CONF
ExecStop=/usr/sbin/squid -k shutdown -f $SQUID_CONF
TimeoutSec=0

[Install]
WantedBy=multi-user.target
```

## 启动

```
systemctl start squid
```

## 验证

```
[root@master squid]# ps -ef | grep squid
root 31417 82275 0 10:01 pts/1 00:00:00 grep --color=auto squid
root 128368 1 0 09:12 ? 00:00:00 /usr/sbin/squid -f /etc/squid/squid.conf
squid 128370 128368 0 09:12 ? 00:00:00 (squid-1) -f /etc/squid/squid.conf
squid 128371 128370 0 09:12 ? 00:00:00 (logfile-daemon) /var/log/squid/access.log
```


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