Tasks In /etc/cron.daily On CentOS 7?

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Hi,

I just configured SquidAnalyzer, a nifty little network statistics tool that I’m using mainly in school networks to monitor network usage.

I want to run the ‘/usr/bin/squid-analyzer’ script once a day. I took a peek in /etc/cron.daily, and the package already installed an
/etc/cron.daily/0squidanalyzer script.

I wanted to know at what time CentOS ran the cron.daily scripts, so I
typed crontab -l, but there was only “no cronjobs defined for root”.

Here’s how things look on a public Slackware64 14.0 server I administrate:

# crontab -l
…
# Run hourly cron jobs at 47 minutes after the hour:
47 * * * * /usr/bin/run-parts /etc/cron.hourly 1> /dev/null
#
# Run daily cron jobs at 4:40 every day:
40 4 * * * /usr/bin/run-parts /etc/cron.daily 1> /dev/null
#
# Run weekly cron jobs at 4:30 on the first day of the week:
30 4 * * 0 /usr/bin/run-parts /etc/cron.weekly 1> /dev/null
#
# Run monthly cron jobs at 4:20 on the first day of the month:
20 4 1 * * /usr/bin/run-parts /etc/cron.monthly 1> /dev/null

How is this handled on CentOS 7?

Cheers,

Niki
—
Microlinux – Solutions informatiques 100% Linux et logiciels libres
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3 thoughts on - Tasks In /etc/cron.daily On CentOS 7?

  • In CentOS 5 this is configured in /etc/crontab

    From CentOS 6 onward, cron.hourly comes out of /etc/cron.d/0hourly and the rest are configured in /etc/anacrontab

    -Thomas

  • Hi Nicki,

    I’m new to CentOS, and came from Slackware servers too. I recently installed 2 servers with CentOS 7 and was unaware of /etc/anacrontab. I saw there was an /etc/crontab file and entered a few executable bash scripts in there. My logs confirm it’s up and functional.

    /etc/crontab :

    SHELL=/bin/bash PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root

    # 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

    20 6 * * * root /root/RTCSS
    20 12 * * * root /root/RTCSS
    20 18 * * * root /root/RTCSS
    10 23 * * * root /root/a1-precise

    CentOS mailing list CentOS@CentOS.org http://lists.CentOS.org/mailman/listinfo/CentOS

  • CentOS / RHEL 7 use anacron for this

    [root@server~]# cat /etc/anacrontab
    # /etc/anacrontab: configuration file for anacron

    # See anacron(8) and anacrontab(5) for details.

    SHELL=/bin/sh PATH=/sbin:/bin:/usr/sbin:/usr/bin MAILTO=root
    # the maximal random delay added to the base delay of the jobs RANDOM_DELAYE
    # the jobs will be started during the following hours only START_HOURS_RANGE=3-22

    #period in days delay in minutes job-identifier command
    1 5 cron.daily nice run-parts /etc/cron.daily
    7 25 cron.weekly nice run-parts /etc/cron.weekly
    @monthly 45 cron.monthly nice run-parts /etc/cron.monthly

    Tris

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