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Systemd-路径不是绝对路径-无法执行

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Systemd-路径不是绝对路径-无法执行

我正在使用 Linux。我有权访问我的用户的根目录。

root@marais:~# pwd
/root

在此目录中我有以下内容：

root@marais:~# ls
example.log  log_watcher.service  log_watcher.sh

log_watcher.service

[Install]
WantedBy=multi-user.target

[Unit]
Description=Log Watcher Service

[Service]
ExecStart=log_watcher.sh

日志观察器

# File to output to
ErrorLogFile="./error.log"
# File to read from
ExampleLogFile="./example.log"


if [ ! -e "$ErrorLogFile" ]; then   # check if file exists
    echo "Creating error file $ErrorLogFile"
    touch $ErrorLogFile
fi

echo "copying error messages from $ExampleLogFile to $ErrorLogFile"
# copy from one file to the other
 ### Challenge 1 ###
# grep ERROR $ExampleLogFile > $ErrorLogFile 
 ### Challenge 2 ###
# tail -f $ExampleLogFile | grep --line-buffered  ERROR | tee $ErrorLogFile 
while :; do grep ERROR $ExampleLogFile > $ErrorLogFile; sleep 2; done

echo "done"

我运行以下命令：

systemctl enable log_watcher

这似乎成功了，因为我已经发送了设置符号链接的消息。

现在，当我尝试启动服务时：

systemctl start log_watcher

似乎什么也没有发生，即log_watcher.sh没有被调用。

所以当我获得状态时：

systemctl status log_watcher

它说log_watcher.sh没有用绝对路径调用。

root@marais:~# systemctl status log_watcher
● log_watcher.service - Log Watcher Service
   Loaded: error (Reason: Invalid argument)
   Active: failed (Result: exit-code) since Fri 2019-10-18 10:49:32 CEST; 9min ago
 Main PID: 2850 (code=exited, status=203/EXEC)

Oct 18 10:49:32 marais systemd[1]: Started Log Watcher Service.
Oct 18 10:49:32 marais systemd[1]: log_watcher.service: Main process exited, code=exited, status=203/EXEC
Oct 18 10:49:32 marais systemd[1]: log_watcher.service: Unit entered failed state.
Oct 18 10:49:32 marais systemd[1]: log_watcher.service: Failed with result 'exit-code'.
Oct 18 10:50:12 marais systemd[1]: [/root/log_watcher.service:8] Executable path is not absolute, ignoring: log_watcher.sh
Oct 18 10:50:12 marais systemd[1]: log_watcher.service: Service lacks both ExecStart= and ExecStop= setting. Refusing.
Warning: log_watcher.service changed on disk. Run 'systemctl daemon-reload' to reload units.

当我跑步时：

root@marais:~# readlink -f log_watcher.sh
/root/log_watcher.sh

它表明我的绝对路径是/root/，并且这是我在中定义的路径log_watcher.service：

ExecStart=/root/log_watcher.sh

问题

请您告知如何启动并执行此服务log_watcher.sh。

谢谢

答案1

在 .service 文件中，我需要/bin/bash在脚本路径前添加。

例如，对于 backup.service：

ExecStart=/bin/bash /root/log_watcher.sh

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