Automatic restart of (eg. crashing) daemons in Linux

I did bit of "googling" Wink and found the following programs that are capable of the job ...

Hiding stuff efficiently from webcrawlers, bots, etc

Actually it's quite trivial, but I never used this method before ... so here it is.

Restarting replication on a slave MySQL DB

Execute the following commands on the slave DB:
STOP SLAVE;
RESET SLAVE;
START SLAVE;

Automatic cleanup of frozen messages in Exim

In my previous post I described how to deal with frozen messages. However eg. on an application server with a huge number of mails sent out on a daily basis you can get hundreds of frozen messages every day due to invalid recipient addresses, etc. In this case you need an automatized way to deal with them.

How to create a summary of frozen messages from the Exim log

Linux administrators using Exim most probably already know the "Message is frozen" warning in the Exim logs. Messages with failed delivery remain in the message queue until you do something about them. Here's a way for making a semi-colon separated list of some headers of these mails.

Sandi Thom - I Wish I Was A Punk Rocker

Tegnap hallottam először ezt a számot a VH1-on és teljesen padlót fogtam. Shock Minimális instrumentális háttérrel és egy erős vokállal simán lenyomja a mai "felfedezettek" 99%-át. Szerintem ezt mindenki szeretni fogja, érdemes rászánni pár percet és megnézni/meghallgatni. Smile A YouTube-on kint van a videoklip és a neten megtalálható a dalszöveg is. Smile

More on Google indexing problems

Not long ago I've discovered that Google's indexing has some flaws and unfortunately I've found a bug again. Sad

C'est la vie

Újra és újra elfelejtem hogyan kell írni a címben szereplő kifejezést, szóval most felírom ide. Smile

Oracle optimizer (9iR2), inline views and "count(*)" queries

Lets suppose you've a big query with an inline view (a subquery in the FROM list) in it and in the outer query you just want to use the count of rows from the inline view. The Oracle optimizer sees this and does not evaluate the expressions in the select-list of the inline view, which can result in a great amount of speed gain if the expressions of the inline view contain heavy processing.

The Last Night of the Proms

Nagyszerű lenne egyszer élőben hallani a The Last Night of the Proms koncertet. Shock Most láttam a 99-es közvetítést a Mezzo-n és fantasztikus volt. Smile

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