Home / ubuntu / Questions / 1236777
Accepted
Brad Thompson
Asked: 2020-05-08 12:48:23 +0800 CST

some CRON jobs are not executed

  • 772

some CRON jobs are not executed like:

crontab -e

          • /usr/bin/echo "Hello"

cron is running

/var/log/syslog:

May  7 16:31:16 zika crontab[115379]: (brad) REPLACE (brad)
May  7 16:31:16 zika crontab[115379]: (brad) END EDIT (brad)
May  7 16:32:01 zika cron[39572]: (brad) RELOAD (crontabs/brad)

but other jobs are executed OK

what could be wrong?

cron

1 Answers

  1. Best Answer

    Your jobs are executed. To see it change your cron job the next way:

    * * * * * /usr/bin/echo "hello" | logger

    | logger will send your echo to syslog so you could see it. But in your case without logger it is actually shown in some virtual terminal you couldn't see.

    $ journalctl -f

    тра 08 00:47:01 ubuntu CRON[21927]: pam_unix(cron:session): session opened for user user1 by (uid=0)
тра 08 00:47:01 ubuntu CRON[21929]: (user1) CMD (/usr/bin/echo "hello" | logger)
тра 08 00:47:01 ubuntu user1[21931]: hello

    From man logger:

    DESCRIPTION
       logger makes entries in the system log.

       When  the optional message argument is present, it is written to the log.  If it
       is not present, and the -f option is not given either, then  standard  input  is
       logged.
    • 1