Linux进程启动：如何编写高效的启动脚本

#!/bin/bash

# 使用绝对路径执行命令
/usr/bin/systemctl start myservice

#!/bin/bash

# 验证依赖服务是否处于活跃状态
if systemctl is-active --quiet httpd; then
    systemctl start myservice
else
    echo "依赖服务httpd未运行。"
    exit 1
fi

#!/bin/bash

# 执行服务启动操作并检查返回状态码
systemctl start myservice
if [ $? -ne 0 ]; then
    echo "无法启动myservice" >> /var/log/myservice.log
    exit 1
fi

#!/bin/bash

# 启动服务并将日志输出至指定文件
systemctl start myservice >> /var/log/myservice.log 2>&1

#!/bin/bash

# 后台启动服务并静默输出
nohup systemctl start myservice > /dev/null 2>&1 &

#!/bin/bash

# 定义所需环境变量
export MY_VAR="value"

# 启动服务
systemctl start myservice

#!/bin/bash

case "$1" in
    start)
        systemctl start myservice
        ;;
    stop)
        systemctl stop myservice
        ;;
    restart)
        systemctl restart myservice
        ;;
    status)
        systemctl status myservice
        ;;
    *)
        echo "用法: $0 {start|stop|restart|status}"
        exit 1
        ;;
esac

# /etc/systemd/system/myservice.service
[Unit]
Description=我的服务
After=network.target

[Service]
ExecStart=/usr/bin/myservice
Restart=always
User=myuser

[Install]
WantedBy=multi-user.target

sudo systemctl enable myservice
sudo systemctl start myservice