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Debian – remove old emails from all users (postfix)
you can add this script to cron!, and
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run cron job for 1 line from console
WordPress Shortcodes
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SSH – autologin to remote host (authorized_keys) and rsync
Phpmyadmin multiconfig
DLE – remove category with ID from all posts
you can use this query , when you was manually removed category from table category
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virtualmin-optimization
memcached set max memory used
memcached -d -m 2048 -u root
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anti ddos script
http://habrahabr.ru/post/84172/