Trouble getting a cron job to run

Question

I'm trying to get a cron job to execute every 20 minutes that will check to make sure a directory isn't down and will output a timestamp to a text file if it is. The cron job is

*/20 * * * * if [ -d PATH_TO_FOLDER ] && [ -s "$(ls -A PATH_TO_FOLDER)" ]; then :; else timestamp=$( date +%T ) && destdir=PATH_TO_TEXT_FILE && echo "$timestamp" >> "$destdir"; fi

This will work perfectly when typed in the command window, but whenever I try to run it as a cron job I get the error:

/bin/sh: -c: line 0: unexpected EOF while looking for matching `)'
/bin/sh: -c: line 1: syntax error: unexpected end of file

I can't figure it out. Thanks for the help.

Answer 1

％字符被cron解释为换行符，您需要对其进行转义-请参阅百分号％在crontab中不起作用