linux cron 作业是否应该用“&”指定以指示在后台运行？
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Should linux cron jobs be specified with an "&" to indicate to run in background?
提问by user265330
In a crontab file, should commands be specified with a trailing "&", or will the command run in the background anyway?
在 crontab 文件中，是否应该使用尾随的“&”指定命令，还是该命令会在后台运行？
I have:
我有：
*/20 * * * * /home/me/monitor/check.sh /home/me/monitor/check.properties >> /home/me/monitor/check.log 2>&1 &
I've seen contradictory answers to this question in various places. Some say no need to put an "&", others that without the ampersand cron waits for output from the command, even though all output is redirected.
我在很多地方看到过这个问题的矛盾答案。有些人说不需要放置“&”，其他人说没有 & 号 cron 会等待命令的输出，即使所有输出都被重定向。
