我让 Icecast 在启动时启动并在后台运行，因此：
# systemctl status icecast2
● icecast2.service - LSB: Icecast2 streaming media server
Loaded: loaded (/etc/init.d/icecast2; generated)
Active: active (running) since Sun 2022-02-27 05:26:53 CET; 3 weeks 5 days ago
Docs: man:systemd-sysv-generator(8)
Process: 623 ExecStart=/etc/init.d/icecast2 start (code=exited, status=0/SUCCESS)
Process: 31649 ExecReload=/etc/init.d/icecast2 reload (code=exited, status=0/SUCCESS)
Tasks: 6 (limit: 4915)
Memory: 10.9M
CGroup: /system.slice/icecast2.service
└─684 /usr/bin/icecast2 -b -c /etc/icecast2/icecast.xml
Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
我也有 ezstream，它在启动时启动，但几天后一直退出，因此：
# systemctl status ezstream
● ezstream.service - source client for Icecast with external de-/encoder support
Loaded: loaded (/lib/systemd/system/ezstream.service; enabled; vendor preset: enabled)
Active: inactive (dead) since Fri 2022-03-18 13:24:01 CET; 1 weeks 0 days ago
Process: 21047 ExecStart=/usr/local/bin/ezstream -c ezstream_mp3.xml (code=exited, status=0/SUCCESS)
Main PID: 21047 (code=exited, status=0/SUCCESS)
该文件/lib/systemd/system/ezstream.service包含：
[Unit]
Description=source client for Icecast with external de-/encoder support
Requires=icecast2.service
After=icecast2.service
[Service]
User=archiwum
WorkingDirectory=/home/archiwum/autopilot
ExecStart=/usr/local/bin/ezstream -c ezstream_mp3.xml
Restart=on-failure
RestartSec=5
[Install]
WantedBy=icecast2.service
并ezstream_mp3.xml有设置播放列表自动重复的元素：<stream_once>0</stream_once>。系统是Debian 10（4.19.0-16-amd64 #1 SMP Debian 4.19.181-1 (2021-03-19) x86_64 GNU/Linux）。
那么，ezstream 为何会退出？又该如何防止这种情况发生？（目前，我可能会systemctl status ezstream每分钟发出一次该命令作为解决方法。）