linuxmosquitto运行,mosquitto使用记录与服务器调试

8种机械键盘轴体对比

本人程序员&＃xff0c;要买一个写代码的键盘&＃xff0c;请问红轴和茶轴怎么选&＃xff1f;

mqtt&＃xff1a;

启动&＃xff1a;1mosquitto -c /etc/mosquitto/mosquitto.conf

加-d表示后台运行&＃xff1a;1mosquitto -c /etc/mosquitto/mosquitto.conf -d

sub一个主题&＃xff1a;1mosquitto_sub -h localhost -t test -d

pub一个消息到主题&＃xff1a;1mosquitto_pub -h localhost -m "中文 的mqtt" -t test -d

重启&＃xff1a;找到线程&＃xff0c;kill1

2ps -A | grep mosquitto

kill -9 xxx

linux最大连接数设置1

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8ulimit -n20000 -s512

ulimit -f unlimited

ulimit -t unlimited

ulimit -v unlimited

ulimit -n 1048576

ulimit -m unlimited

ulimit -u 1048576

Till now I have achieved 74K concurrent connections on a broker. I have configured the ulimit of broker server by editing sysctl.conf and limit.conf file.vi /etc/sysctl.conf1

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6fs.file-max &＃61; 10000000

fs.nr_open &＃61; 10000000

net.ipv4.tcp_mem &＃61; 786432 1697152 1945728

net.ipv4.tcp_rmem &＃61; 4096 4096 16777216

net.ipv4.tcp_wmem &＃61; 4096 4096 16777216

net.ipv4.ip_local_port_range &＃61; 1000 65535vi /etc/security/limits.conf1

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4* soft nofile 10000000

* hard nofile 10000000

root soft nofile 10000000

root hard nofile 10000000

After this reboot your system.

mqtt启动后&＃xff0c;需要开放对应端口的&＃xff0c;则处理如下

CentOS 7.0默认使用的是firewall作为防火墙&＃xff0c;使用iptables必须重新设置一下

1、直接关闭防火墙1

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3systemctl stop firewalld.service #停止firewall

systemctl disable firewalld.service #禁止firewall开机启动

2、设置 iptables service1yum -y install iptables-services

如果要修改防火墙配置&＃xff0c;如增加防火墙端口33061vi /etc/sysconfig/iptables

增加规则1-A INPUT -m state --state NEW -m tcp -p tcp --dport 3306 -j ACCEPT

保存退出后1

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3systemctl restart iptables.service #重启防火墙使配置生效

systemctl enable iptables.service #设置防火墙开机启动

最后重启系统使设置生效即可。