我的crontab中有两个cronjob。第一部作品；第二个没有。具体来说，
40 18 * * * cp /mnt/c/Users/Adrian/pick_of_the_day/daily_winner /mnt/c/Users/Adrian/pick_of_the_day/`date +'%b-%d-winner'`
不起作用。
我尝试过：
- commenting out the first one
- removing the full path for the destination file and checking the default DIR for my user
- using a relative path for the dest file
- looking through 5 other cronjob questions on this site
- looking for the cron log file but it doesn't exist. Before someone tells me to check syslog, please note it doesn't exist on my installation.
- **I removed the ">>/var/log/cron_output.log 2>&1" and just left the command**
Aviator@AW:/var/log$ ls
alternatives.log btmp dpkg.log fsck lxd upstart
apt dist-upgrade fontconfig.log lastlog unattended-upgrades wtmp
Aviator@AW:/var/log$
35 18,21 * * * /mnt/c/Users/Adrian/pick_of_the_day/winner
40 18 * * * cp /mnt/c/Users/Adrian/pick_of_the_day/daily_winner
/mnt/c/Users/Adrian/pick_of_the_day/`date +'%b-%d-winner'` >>/var/log/cron_output.log 2>&1
答案 0 :(得分：1)
在cron需要％将字符而它们如果在脚本或直接在CMD线不逃脱。
逸出他们的cronjob然如预期之后。
cp /mnt/c/Users/Adrian/pick_of_the_day/daily_winner /mnt/c/Users/Adrian/pick_of_the_day/$(date +'\%b\%mwinner')
我刚刚找到的相关答案： https://unix.stackexchange.com/questions/29578/how-can-i-execute-date-inside-of-a-cron-tab-job
https://unix.stackexchange.com/questions/252615/why-doesnt-date-f-t-work-in-crontab