当我crontab -e
在终端中写入命令时,
我收到此错误信息:
no crontab for root - using an empty one 888
我不知道“888”是什么意思?
crontab的配置文件/etc/crontab:
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.
SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
# m h dom mon dow user command
58 * * * * root cd / && run-parts --report /etc/cron.hourly
52 0 * * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
46 0 * * 7 root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
9 5 28 * * root test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )
#
请帮我。
谢谢。
答案1
您的crontab
编辑器已切换为ed
。要退出ed
,请按Q,然后按Enter。这将退出ed
编辑器。
如果您想将crontab
编辑器改回nano
使用:
sudo select-editor
这也可能有帮助:
EDITOR=nano crontab -e
答案2
这是默认文件中的字符数。Ubuntu 会创建一个“空”的 crontab 文件,其中包含大量注释,说明如何使用它。
crontab -e
# Edit this file to introduce tasks to be run by cron.
#
# Each task to run has to be defined through a single line
# indicating with different fields when the task will be run
# and what command to run for the task
#
# To define the time you can provide concrete values for
# minute (m), hour (h), day of month (dom), month (mon),
# and day of week (dow) or use '*' in these fields (for 'any').#
# Notice that tasks will be started based on the cron's system
# daemon's notion of time and timezones.
#
# Output of the crontab jobs (including errors) is sent through
# email to the user the crontab file belongs to (unless redirected).
#
# For example, you can run a backup of all your user accounts
# at 5 a.m every week with:
# 0 5 * * 1 tar -zcf /var/backups/home.tgz /home/
#
# For more information see the manual pages of crontab(5) and cron(8)
#
# m h dom mon dow command
"/tmp/crontab.vILdXR/crontab" 22L, 888C