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This article is about how to solve the problem of non-execution of crontab scheduled tasks. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

Preface

The scheduled tasks to implement Linux are: cron, anacron, at, etc. Cron is the service name, crond is the background process, and crontab is the customized schedule of scheduled tasks.

Today, however, it takes so long for crontab to realize that it also needs to be started.

Added scheduled tasks but didn't work well

[root@dev-gl-lh2 ApiAgent] # cat / etc/crontab SHELL=/bin/bashPATH=/sbin:/bin:/usr/sbin:/usr/binMAILTO=rootHOME=/# 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 when the flowers are gone, they don't wait for the log.

# View crontab status [root@dev-gl-lh2 ApiAgent] # / etc/init.d/crond status crond dead but pid file exists# start crontab service [root@dev-gl-lh2 ApiAgent] # / etc/init.d/crond startStarting crond:

The log has output the successful execution of the script, increasing knowledge.

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