Analysis and solution of the reasons why crontab scheduled tasks are not executed
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Preface The following are the ways to implement Linux scheduled tasks: cron, anacron, at, etc. cron is the service name, crond is the background process, and crontab is a customized scheduled task table. However, I learned a lot today. I have been using crontab for so long and I just realized that I need to start it. Added a scheduled task but it doesn't work well [root@dev-gl-lh1 ApiAgent]# cat /etc/crontab SHELL=/bin/bash PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root HOME=/ # For details see man 4 crontabs # Example of job definition: # .---------------- minute (0 - 59) # | .------------- hour (0 - 23) # | | .---------- day of month (1 - 31) # | | | .------- month (1 - 12) OR jan,feb,mar,apr ... # | | | | .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat # | | | | | # * * * * * user-name command to be executed # Cache coin mapping data */5 * * * * root /usr/bin/php /data/application/SwooleMoney/script/bin/cli.php CacheData cacheCoinMap # Cache transaction pair information*/1 * * * * root /usr/bin/php /data/application/SwooleMoney/script/bin/cli.php CacheData cacheSymbol # Delete depth data*/1 * * * * root /usr/bin/php /data/application/SwooleMoney/script/bin/cli.php CacheData clearExchangeDepths >/tmp/clearExchangeDepths.log ~ ~ The script is executed every minute, but the log is not displayed until the flowers are all gone. # Check crontab status [root@dev-gl-lh1 ApiAgent]# /etc/init.d/crond status crond dead but pid file exists # Start crontab service [root@dev-gl-lh1 ApiAgent]# /etc/init.d/crond start Starting crond: OK, the log output shows that the script was successfully executed, and I learned a lot. Reference address: https://www.jb51.net/article/154290.htm Summarize The above is the full content of this article. I hope that the content of this article will have certain reference learning value for your study or work. If you have any questions, you can leave a message to communicate. Thank you for your support for 123WORDPRESS.COM. You may also be interested in:
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