win10系统中wsl2开启systemctl命令

默认情况下在wsl2中使用systemctl命令会报错

$ sudo systemctl status cron.service
System has not been booted with systemd as init system (PID 1). Can't operate.
Failed to connect to bus: Host is down

解决办法:

1. 安装daemonize

   sudo apt-get install daemonize
   

2. 执行以下两句命令开启

   sudo daemonize /usr/bin/unshare --fork --pid --mount-proc /lib/systemd/systemd --system-unit=basic.target
   
   exec sudo nsenter -t $(pidof systemd) -a su - $LOGNAME