Many a times it happens we schedule some cron job to get executed, we do check as well whether command gets executed properly or not. And even though we tried the command your cron fail to execute. There
are two possibilities either cron is not configured properly or some how command is failed. Now in this case how do we check if cron is getting executed or not. Does it gets logged some where when is last cron executed? Yes it does get logged in syslog you can run following command to check cron entries
$ grep CRON /var/log/syslog
Mar 10 08:00:01 staging01 CRON[23609]: (root) CMD (my-command)
Mar 10 08:00:01 staging01 CRON[23608]: (CRON) info (No MTA installed, discarding output)
Mar 10 08:10:01 staging01 CRON[23611]: (root) CMD (my-command)
Mar 10 08:10:01 staging01 CRON[23610]: (CRON) info (No MTA installed, discarding output)
Mar 10 08:17:01 staging01 CRON[23613]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Mar 10 08:20:01 staging01 CRON[23616]: (root) CMD (my-command)
Mar 10 08:20:01 staging01 CRON[23615]: (CRON) info (No MTA installed, discarding output)
Mar 10 08:30:01 staging01 CRON[23618]: (root) CMD (my-command)
Mar 10 08:30:01 staging01 CRON[23617]: (CRON) info (No MTA installed, discarding output)
Mar 10 08:40:01 staging01 CRON[23620]: (root) CMD (my-command)
Mar 10 08:40:01 staging01 CRON[23619]: (CRON) info (No MTA installed, discarding output)
Mar 10 08:50:01 staging01 CRON[23698]: (root) CMD (my-command)