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--- планирование_выполнения_заданий [2009/03/11 12:06]
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+++ планирование_выполнения_заданий [2009/07/02 15:29]
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@@ Line 1: / Line 1: @@
 ====== Планирование выполнения заданий ======
-Сервис cron
+===== Примеры периодических задач =====
-[gX:~] # crontab -e
-* * * * * echo "Hello from cron" > /dev/ttyp1
-[gX:~] # crontab -l
+==== Обновление системы ====
-*/1 * * * * echo "Hello from cron" > /dev/ttyp1
+<code>
+[hostX:~] # freebsd-update fetch
+</code>
-[gX:~] # crontab -r
+==== Обновление дерева портов ====
-remove crontab for root? y
+<code>
-Скрипты periodic
+[hostX:~] # portsnap fetch
-[gX:~] # periodic daily
+</code>
-[gX:~] # more /var/mail/root
+==== Резервное копирование файлов конфигурации ====
+<code>
+[hostX:~] # cat backup.sh
+#!/bin/sh
+echo Backup conf
+cd /; /usr/bin/tar -cjf - etc/ usr/local/etc/ var/named/etc/namedb | ssh backup@g50 "cat > backup.`date '+%Y%m%d'`.tbz"
+</code>
+или попроще:
+<code>
+[hostX:~] # cat backup.sh
+#!/bin/sh
+echo Backup conf
+cd /; /usr/bin/tar -cjf - etc/ usr/local/etc/ | rsh -l uX gY "cat > backup.tbz"
-[gX:~] # rm /var/mail/root
+[hostX:~] # chmod +x backup.sh
+</code>
+===== Сервис cron =====
+<code>
+[hostX:~] # crontab -e
-[gX:~] # grep df /etc/defaults/periodic.conf
+[hostX:~] # crontab -l
+0 * * * /usr/sbin/freebsd-update cron
+0 * * * /usr/sbin/portsnap cron
+0 * * * /root/backup.sh
-[gX:~] # cat /etc/periodic.conf
-daily_status_disks_df_flags="-h -t ufs"
-ИЛИ
+[hostX:~] # crontab -l -u root
+...
-[gX:~] # pkg_add /usr/ports/packages/All/portaudit.tbz
+[hostX:~] # crontab -r
+</code>
-[gX:~] # ls /usr/local/etc/periodic/security
+===== Система periodic =====
-[gX:~] # periodic daily
+==== Использование ====
-[gX:~] # more /var/mail/root
+<code>
+[hostX:~] # periodic daily
-Планирование заданий (программа at)
+[hostX:~] # more /var/mail/root
-[gX:~] # echo "echo Hello from at > /dev/ttyp1" | at now + 3 minutes
-Job 1 will be executed using /bin/sh
-[gX:~] # echo "echo Hello from at > /dev/ttyp1" | at 18:40
+[hostX:~] # rm /var/mail/root
-Job 2 will be executed using /bin/sh
-[gX:~] # echo "rm –rf /*" | at 18:40 10/26/10
+</code>
-Job 3 will be executed using /bin/sh
-[gX:~] # atq
+==== Настройка ====
-Date                            Owner           Queue   Job#
+<code>
-Tue Oct 25 19:27:00 UTC 2005    root            c       1
+[hostX:~] # grep df /etc/defaults/periodic.conf
-Wed Oct 26 18:40:00 UTC 2005    root            c       2
-Wed Oct 26 18:40:00 UTC 2006    root            c       3
-[gX:~] # atrm 3
+[hostX:~] # cat /etc/periodic.conf
+daily_status_disks_df_flags="-h -t ufs"
+</code>
-[gX:~] # at -c 2
+==== Расширение ====
-...
+<code>
+[hostX:~] # pkg_add /usr/ports/packages/All/portaudit.tbz
+[hostX:~] # ls /usr/local/etc/periodic/security
+[hostX:~] # cp backup.sh /usr/local/etc/periodic/daily/
+[hostX:~] # periodic daily
+[hostX:~] # more /var/mail/root
+</code>
+===== Система atrun =====
+<code>
+[hostX:~] # echo "/bin/date > /dev/console" | at now + 3 minutes
+[hostX:~] # echo "/bin/date > /dev/console" | at 18:40
+[hostX:~] # echo "rm –rf /*" | at 23:59 12/31/2015
+[hostX:~] # atq
+[hostX:~] # atrm 3
+[hostX:~] # at -c 2
+...
+</code>

Методические материалы Лохтурова Вячеслава

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