Accrual to Clinical Trials
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Info Box
titlePurpose

The Patient List Viewer harness invokes the at commands to place jobs in the background. This frees up the UI while long queries are running.

Note
titleat command

Some Linux systems do not have the at command installed.

  • Install at by typing in: yum install at
  • Start the atd daemon by typing in:
    Note Box
    titleATD service

    The ATD service is installed along with the at command. This service is required to be running for the at command to work

    Steps

    Install at by using your package manager. For example, if you are using yum as a package manager, type in:

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    languagebash
    themeEmacs
    yum install at

    To start the ATD services on newer systems, type in:

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    languagebash
    themeEmacs
    systemctl start atd

    For older systems type in:

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    languagebash
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    /etc/init.d/atd start
  • Make sure atd is set to start each time the server is rebooted
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    Note
    titleAuto Start on Reboot

    Follow your system admin procedures to make sure the ATD service starts up automatically on system boot.

    Tip Box
    titleArticle

    https://unix.stackexchange.com/questions/86016/how-to-install-and-use-at-job-scheduling