常用命令
systemctl daemon-reload
systemctl enable nginx.service
systemctl status nginx.service
systemctl stop nginxsy
stemctl start nginx
systemctl restart nginx
journalctl -xe
SSH
# cat /usr/lib/systemd/system/sshd.service [Unit] # 系统服务描述及说明模块 Description=OpenSSH server daemon # 描述性说明。 Documentation=man:sshd(8) man:sshd_config(5) # 文档列表说明 After=network.target sshd-keygen.service # 服务依赖类别说明 Wants=sshd-keygen.service # 可选的依赖服务 [Service] # 系统服务的运行参数设置模块 Type=notify # 服务类型，可选有forking、notify、simple等 EnvironmentFile=/etc/sysconfig/sshd # 环境变量等的配置文件 ExecStart=/usr/sbin/sshd -D $OPTIONS # 服务的启动程序 ExecReload=/bin/kill -HUP $MAINPID # 重启程序 KillMode=process Restart=on-failure RestartSec=42s [Install] # 服务安装的相关设置 WantedBy=multi-user.target # 设置多用户级别。可为空格分隔的列表，表示在使用systemctl enable启用此单元时，将会在对应的目录设置对应文件的软连接
Nginx
[Unit] Description=nginx - high performance web server Documentation=http://nginx.org/en/docs/ After=network-online.target remote-fs.target nss-lookup.target Wants=network-online.target [Service] Type=forking PIDFile=/var/run/nginx.pid ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf ExecReload=/bin/kill -s HUP $MAINPID ExecStop=/bin/kill -s TERM $MAINPID [Install] WantedBy=multi-user.target
[Unit] Description=The NGINX HTTP and reverse proxy server After=syslog.target network.target remote-fs.target nss-lookup.target [Service] Type=forking PIDFile=/usr/local/nginx/logs/nginx.pid ExecStartPre=/usr/local/nginx/sbin/nginx -t ExecStart=/usr/local/nginx/sbin/nginx ExecReload=/bin/kill -s HUP $MAINPID ExecStop=/bin/kill -s QUIT $MAINPID PrivateTmp=true [Install] WantedBy=multi-user.target
Maxwell
# Maxwell systemd service file [Unit] Description=Maxwell Sync binlog After=network.target [Install] WantedBy=multi-user.target [Service] User=maxwell Group=maxwell Type=forking Environment="JAVA_HOME=/usr/local/jdk" ExecStartPre=/usr/bin/cd /maxwell WorkingDirectory=/data/server/maxwell ExecStart=/maxwell/bin/maxwell --daemon --config config.properties ExecReload=/bin/kill -s HUP $MAINPID ExecStop=/bin/kill -s QUIT $MAINPID