我的操作系统是Debian 10（Buster），4.19内核，Tomcat9似乎不稳定。
\n\n我不想在运行“systemctl status tomcat9.service”命令时看到任何错误消息。
\n\n但是，“systemctl status tomcat9.service”命令打印错误消息。
\n\n\xe2\x97\x8f tomcat9.service - Apache Tomcat 9 Web Application Server\n Loaded: loaded (/lib/systemd/system/tomcat9.service; enabled; vendor preset: enabled)\n Active: failed (Result: exit-code) since Tue 2020-03-03 21:02:15 KST; 12min ago\n Docs: https://tomcat.apache.org/tomcat-9.0-doc/index.html\n Process: 25999 ExecStartPre=/usr/libexec/tomcat9/tomcat-update-policy.sh (code=exited, status=226/NAMESPACE)\n\nMar 03 21:02:15 doonas.com systemd[1]: Starting Apache Tomcat 9 Web Application Server...\nMar 03 21:02:15 doonas.com systemd[25999]: tomcat9.service: Failed to set up mount namespacing: No such file or directory\nMar 03 21:02:15 doonas.com systemd[25999]: tomcat9.service: Failed at step …