删除 Freeradius 后，我尝试在 Ubuntu 上安装它，但无法安装并显示此错误：
netadmin@hotspot:~$ sudo dpkg --configure -a
Setting up freeradius-mysql (2.2.8+dfsg-0.1build2) ...
freeradius.service is not active, cannot reload.
invoke-rc.d: initscript freeradius, action "force-reload" failed.
dpkg: error processing package freeradius-mysql (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
freeradius-mysql
尝试安装时出现此错误：
Job for freeradius.service failed because the control process exited with error code. See "systemctl status freeradius.service" and "journalctl -xe" for details .
invoke-rc.d: initscript freeradius, action "restart" failed.
● freeradius.service - LSB: Radius Daemon
Loaded: loaded (/etc/init.d/freeradius; bad; vendor preset: enabled)
Active: failed (Result: exit-code) since Fri 2017-06-02 10:19:33 -03; 7ms ago
Docs: man:systemd-sysv-generator(8)
Process: 14610 ExecStart=/etc/init.d/freeradius start (code=exited, status=1/F AILURE)
Jun 02 10:19:33 hotspot systemd[1]: Starting LSB: Radius Daemon...
Jun 02 10:19:33 hotspot freeradius[14610]: * Starting FreeRADIUS daemon fre...s
Jun 02 10:19:33 hotspot freeradius[14610]: ...fail!
Jun 02 10:19:33 hotspot systemd[1]: freeradius.service: Control process exi...=1
Jun 02 10:19:33 hotspot systemd[1]: Failed to start LSB: Radius Daemon.
Jun 02 10:19:33 hotspot systemd[1]: freeradius.service: Unit entered failed...e.
Jun 02 10:19:33 hotspot systemd[1]: freeradius.service: Failed with result ...'.
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我尝试了所有方法以确保旧的 Freeradius 被完全删除，但无法安装新的