待整理
swoole_config.h:22:2: 错误:#error "GCC 4.8 or later required"
swoole_config.h:22:2: 错误:#error "GCC 4.8 or later required"
## 确定系统 gcc 版本
```bash
cc -v
gcc -v
```
## 升级gcc [参考本站升级教程]
## 升级 gcc 后任然报此错
来swoole在linux上默认用的是cc，不是gcc，
而cc是gcc(旧版)的软连。备份了下原来的
git 错误: Unable to find remote helper for 'https'
git 错误: Unable to find remote helper for 'https'
centos7中没有service iptables save指令来保存防火墙规则
centos7中没有service iptables save指令来保存防火墙规则1.任意运行一条iptables防火墙规则配置命令：```iptables -P OUTPUT ACCEPT```2.对iptables服务进行保存：```service iptables save```如果上述命令执行失败报出：```The service command suppo
MySQL-this is incompatible with sql_mode=only_full_group_by错误解决方案
需修改`mysql`配置文件，通过手动添加`sql_mode`的方式强制指定不需要`ONLY_FULL_GROUP_BY`属性
sql_mode=STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,NO_ZERO_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
iptables 中 ip 通配符的设置案例
```bash192.68.1.1/32 means ONLY address 92.168.1.1192.168.1.0/24 means every address from 92I68.0 to 192.168.1.255192.168.0.0/6 means every address from 92.68.0.0 to 192.68.255.255192.0.0.0/8 mea