Linux

3
# ls /etc/cron.hourly/
0anacron
# cat /etc/cron.hourly/0anacron
#!/bin/bash
# Skip excecution unless the date has changed from the previous run
if test -r /var/spool/anacron/cron.daily; then
day=`cat /var/spool/anacron/cron.daily`
fi
if [ `date +%Y%m%d` = "$day" ]; then
exit 0;
fi
# Skip excecution unless AC powered
if test -x /usr/bin/on_ac_power; then
/usr/bin/on_ac_power &> /dev/null
if test $? -eq 1; then
exit 0
fi
fi
/usr/sbin/anacron -s
/etc/cron.d/raid-check RAID raid-check
1
# cat /etc/cron.d/raid-check
# Run system wide raid-check once a week on Sunday at 1am by default
0 1 ∗ ∗ Sun root /usr/sbin/raid-check
/etc/cron.d/sysstat sar 10
/usr/lib64/sa/sa1 23 53 /usr/lib64/sa/sa2
# cat /etc/cron.d/sysstat
# Run system activity accounting tool every 10 minutes
∗/10 ∗ ∗ ∗ ∗ root /usr/lib64/sa/sa1 1 1
# 0 ∗ ∗ ∗ ∗ root /usr/lib64/sa/sa1 600 6 &
# Generate a daily summary of process accounting at 23:53
53 23 ∗ ∗ ∗ root /usr/lib64/sa/sa2 -A
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