Dwunaste_21
0 21 fiche michalesq
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Two services performing jobs automatically in the system?
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at / cron
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How to start at service?
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systemctl start atd
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How to list all at jobs?
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atq
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How to schedule a job with at?
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at 12:00am / 12:00pm / +5 minutes / +5 hours / +5 days ... etc + enter // then command
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How to put your own logs into the system?
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logger "The system current uptime is $(uptime)"
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Where to put users not allowed to schedule logs with at?
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/etc/at.deny
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Where to put users allowed to schedule logs with at?
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/etc/at.allow
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Where to put users not allowed to schedule logs with cron?
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/etc/cron.deny
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Where to put users allowed to schedule logs with cron?
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/etc/cron.allow
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How to schedule a task with cron?
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create a file in /etc/cron. d and put following * * * * * user-name command to be executed
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How to schedule a task to perform something daily at 9
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0 9 * * * root /root/del_old_rec/del_old_rec. sh
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How to schedule a task which will perform something every 5 minutes?
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*/5 * * * * root /root/del_old_rec/del_old_rec. sh
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How to schedule a task which will perform something between 4th and 14th day every 5 minutes?
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*/5 4-14 * * * root /root/del_old_rec/del_old_rec. sh
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Command shows config files of installed application
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rpm -qc <application>
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Command to run all tasks in anacron
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anacron -n
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What is anacron for?
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Anacron checks after PC launched if scripts included in /etc/anacron were performed on planned dates. If not, it performs it
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How to schedule anacron jobs?
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period delay job-identifier command // 7 15 test. daily /root/run. sh ---executes script once per 7 days, 15 mintues after system comes back
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Where are symlinks for multi-user. target?
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/etc/systemd/system/multi-user.target.wants
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Where is kickstart script?
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vi /root/anakonda.ks. cfg
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How to install kickstart?
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yum install system-config-kickstart
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What server do you need to serve kickstart file to the client?
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PXE
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