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Martin Hope
EnDelt64
Asked: 2019-07-26 18:50:41 +0800 CST
  • 1
$ netstat -nap
(No info could be read for "-p": geteuid()=1000 but you should be root.)
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
Active UNIX domain sockets (servers and established)
Proto RefCnt Flags       Type       State         I-Node   PID/Program name     Path

nestat命令没有提供有关正在使用的端口的信息。例如，我在这台 PC 上运行 redis-server，但这里没有显示。

我该如何解决这个问题？Linux 发行版是 Microsoft WSL Ubuntu 18.04。

netstat
Martin Hope
EnDelt64
Asked: 2019-03-16 23:05:05 +0800 CST
  • 2

我已经在 Ubuntu 18.04 上安装了 Tomcat 9，并尝试将其添加到服务中。

但是，与其他用户不同，tomcat.pid文件在任何地方都不存在。所以我的 Tomcat 服务文件会产生错误。

[Unit]
Description=Apache Tomcat 9 Servlet Container
After=syslog.target network.target

[Service]
User=nblizz
Group=nblizz
Type=forking
Environment=CATALINA_PID=/opt/apache-tomcat-9.0.16/tomcat.pid <--- !! (Not exist)
Environment=CATALINA_HOME=/opt/apache-tomcat-9.0.16
Environment=CATALINA_BASE=/opt/apache-tomcat-9.0.16
ExecStart=/opt/apache-tomcat-9.0.16/bin/startup.sh
ExecStop=/opt/apache-tomcat-9.0.16/bin/shutdown.sh
Restart=on-failure

[Install]
WantedBy=multi-user.target

运行Tomcat没问题，但是停止tomcat的时候报错。

● apache-tomcat.service - Apache Tomcat 9 Servlet Container
   Loaded: loaded (/etc/systemd/system/apache-tomcat.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Sat 2019-03-16 01:30:39 KST; 1s ago
  Process: 1462 ExecStop=/opt/apache-tomcat-9.0.16/bin/shutdown.sh (code=exited, status=1/FAILURE) <--- !!
  Process: 545 ExecStart=/opt/apache-tomcat-9.0.16/bin/startup.sh (code=exited, status=0/SUCCESS)
 Main PID: 573 (code=killed, signal=TERM)

Mar 16 01:17:29 ndelt-personal systemd[1]: Starting Apache Tomcat 9 Servlet Container...
Mar 16 01:17:29 ndelt-personal startup.sh[545]: Tomcat started.
Mar 16 01:17:29 ndelt-personal systemd[1]: Started Apache Tomcat 9 Servlet Container.
Mar 16 01:30:39 ndelt-personal systemd[1]: Stopping Apache Tomcat 9 Servlet Container...
Mar 16 01:30:39 ndelt-personal shutdown.sh[1462]: $CATALINA_PID was set but the specified file does not exist. Is Tomcat running? Stop aborted.
Mar 16 01:30:39 ndelt-personal systemd[1]: apache-tomcat.service: Control process exited, code=exited status=1
Mar 16 01:30:39 ndelt-personal systemd[1]: apache-tomcat.service: Failed with result 'exit-code'.
Mar 16 01:30:39 ndelt-personal systemd[1]: Stopped Apache Tomcat 9 Servlet Container.

另外，文件的颜色与apache-tomcat.service其他文件不同。（https://isstatic.askoverflow.dev/WnD3Y.png）

问题是什么？

tomcat
Martin Hope
EnDelt64
Asked: 2018-09-01 01:24:24 +0800 CST
  • 0
● mysql.service - MySQL Community Server
   Loaded: loaded (/lib/systemd/system/mysql.service; enabled; vendor preset: enabled)
   Active: active (running) since Fri 2018-08-31 18:03:37 KST; 9min ago
  Process: 6005 ExecStart=/usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid (code=exited, status=0/SUCCESS)
  Process: 5996 ExecStartPre=/usr/share/mysql/mysql-systemd-start pre (code=exited, status=0/SUCCESS)
 Main PID: 6007 (mysqld)
    Tasks: 30 (limit: 4915)
   CGroup: /system.slice/mysql.service
           └─6007 /usr/sbin/mysqld --daemonize --pid-file=/run/mysqld/mysqld.pid

 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: 2018-08-31T09:03:37.409469Z 0 [Note] Found ca.pem, server-cert.pem and server-key.pem in data directory. Trying to enable SSL support using them.
 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: 2018-08-31T09:03:37.409772Z 0 [Warning] CA certificate ca.pem is self signed.
 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: 2018-08-31T09:03:37.413194Z 0 [Note] Server hostname (bind-address): '*'; port: 3306
 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: 2018-08-31T09:03:37.413243Z 0 [Note] IPv6 is available.
 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: 2018-08-31T09:03:37.413255Z 0 [Note]   - '::' resolves to '::';
 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: 2018-08-31T09:03:37.413294Z 0 [Note] Server socket created on IP: '::'.
 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: 2018-08-31T09:03:37.427078Z 0 [Note] Event Scheduler: Loaded 0 events
 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: 2018-08-31T09:03:37.427439Z 0 [Note] /usr/sbin/mysqld: ready for connections.
 Aug 31 18:03:37 lenovo-g50-45 mysqld[6005]: Version: '5.7.23-0ubuntu0.18.04.1'  socket: '/var/run/mysqld/mysqld.sock'  port: 3306  (Ubuntu)
 Aug 31 18:03:37 lenovo-g50-45 systemd[1]: Started MySQL Community Server.

与上述状态一样，当 PC 重新启动时 MySQL 启动良好。但奇怪的是，文件夹中没有任何名为“mysql”的/etc/init.d文件。

启动PC时没有初始化脚本如何启动MySQL？如何将 MySQL 添加到 init.d 文件夹？

mysql