如何创建每 5 分钟在日志文件中插入一条记录的 bash 脚本？
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How to create a bash script that every 5 minutes insert a record in a log file?
提问by AndreaNobili
I am very new into bash scripting and I need to create a simple script that every 5 minutes insert the date and time into a log file and save it.
我对 bash 脚本很陌生，我需要创建一个简单的脚本，每 5 分钟将日期和时间插入到日志文件中并保存。
What can I do to do it? From what can I start?
我该怎么做？我可以从什么开始？
回答by timgeb
The datecommand will output the current date and time. You can append the output of a command to a file with >>. Finally, sleepwill pause a script for a specified amount of seconds.
该date命令将输出当前日期和时间。您可以将命令的输出附加到带有>>. 最后，sleep将暂停脚本指定的秒数。
#!/bin/bash
while true; do
date >> /path/to/the/logfile/dates.log
sleep 300
done
The datecommand also provides options to modify the format of the output, if the optionless output does not suit your needs.
date如果无选项输出不适合您的需要，该命令还提供修改输出格式的选项。
Alternatively, you could issue
或者，您可以发出
crontab -e
and add the line
并添加行
*/5 * * * * date >> /path/to/the/logfile/dates.log
Of course, you can use any name for your logfile, dates.logis just the placeholder I used.
当然，您可以为日志文件使用任何名称，dates.log这只是我使用的占位符。
回答by Kimmax
Write the bash script that does what you want and add the script to cron and set it to run every 5min.
编写执行所需操作的 bash 脚本，并将脚本添加到 cron 并将其设置为每 5 分钟运行一次。
