Author Archives: Piotr

Server security and integrity

If you have presence in internet, whether it is a server you fully manage or hosted, even shared by somebody else, you need to think how you can secure yourself from potential malicious attack. Truth is simple, you will be … Continue reading

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Memory usage in Linux

Memory usage in linux always seems high, regardless of what applications you are running and if you restarting them or now. And if you leave it as it is, it raises over time without any reason. There is a simple … Continue reading

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Use sed & Bash To Help With ssh Annoyance

ssh keeps track of the systems it is connected to, and is able to tell you if a particular system has changed. It is a security feature – informing you about the change of a fingerprint of the system you … Continue reading

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My malicious web site

You have a legitimate business, heavily relying on a website. And out of the blue that website becomes blacklisted in major browsers. Quick look at the reason reveals that your Chrome, Firefox or Internet Explorer thinks that this site is … Continue reading

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Installing PDO and PDO_MySQL Extensions On cPanel Server

Usually changing any configuration of Apache or PHP configuration on the cPanel machine involves the use of EasyApache. This is a nice install script, but it rebuilds both Apache and PHP from scratch, which seems a bit extensive for a … Continue reading

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Moving CentOS Drives to a New Chassis

Sometimes you may need to move a linux OS to a new house, either because of the old hardware failing or because of this hardware being simply too old and needing upgrading for performance reasons. If it is the later … Continue reading

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CLI one-liners explained

If you want to cut a specific number of characters from the end of a string in bash, you could use following construction : rev | cut -b 4- | rev For example, piping it with a command that gives … Continue reading

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Should You Develop New Code Or Reanimate Old?

Should You Develop New Code Or Reanimate Old? At times developers, project managers or in fact anybody doing IT related work may face quite a puzzling dilemma – you have a project that is currently live somewhere, but users/owners are … Continue reading

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Tales of the sysadmin : patching

One thing that sysadmin is rather often involved is patching. You need to keep an eye on the exploits, and if possible apply new versions of software that you are using on the server. There is an obvious danger related … Continue reading

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Is Query Cache a Good Thing?

There is no doubt that the MySQL is one of the most popular open source database servers out there. It is a free, powerful and reliable tool to store most types and sets of data. One thing worth mentioning however, … Continue reading

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