Installation cron (Ubuntu system comes)
apt-get install cron
Open crontab log
Log in default is not open, we need to find # cron /etc/rsyslog.d/50-default.conf files. *, The # comment deleted signature
You can use vim to edit files, Reference Vim Start Basics
After editing, restart the rsyslog service
service rsyslog restart；
Restart crontab Service
service cron restart；
A brief presentation
First, we create a new file
/tmp/time.txt
(Can be created using vim editor)
vim /tmp/time.txt
Write a timed task
crontab -e
PS:
Every minute * * * * *
executed every five minutes * / 5 * * * *
every hour 0 * * * *
execution day 00 * * * execution * * 0 0 0 weekly monthly execution * 001 * implementation of 0011 per year *
In the last insert a new row
* * * * * date >> /tmp/time.txt
(Per minute write the current time to the target file)
Restart service wait a bit to see the results
cat /tmp/time.txt
3 , Cron Jobs list is displayed using the following command to list the current user cron jobs plan. crontab - L If you want to see other user's cron job, you can use the following command (which lists the specified user cron job): crontab the -l -u username
Original Address:
https://www.cnblogs.com/it-taosir/p/9907541.html
https://blog.csdn.net/longgeaisisi/article/details/90477975
https://www.cnblogs.com/xwdreamer /p/8980719.html