Linux: How To Create a USB Debian Installation Flash Drive
In this tutorial I'll show you how to create a USB drive which can be used as an installation media to install Debian Linux.
You will need a computer which is already running Linux and a USB flash drive of size at least 256 MB which we will prepare as our installation media.
Insert the USB drive into the computer running Linux and make sure it gets detect by the Linux Kernel. You can check if the USB device got detect or not by running the following command:
dmesg
and you should see something like this:
[143981.321725] sd 8:0:0:0: [sdb] .321725 512-byte hardware sectors (1024 MB)
[143981.522718] sd 8:0:0:0: [sdb] Write Protect is off
....
[143981.522719] sd 8:0:0:0: [sdb] Attached SCSI disk
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How To Install and Integrate eAccelerator into PHP5
eAccelerator is an open source PHP accelerator, optimizer, and dynamic content cache which provides a bytecode cache. eAccelerator increases the performance of PHP scripts by caching them in their compiled state, so that the overhead of compiling is almost completely eliminated. It also optimizes scripts to speed up their execution. eAccelerator typically reduces server load and increases the speed of your PHP code by 1-10 times.
1. Install prerequisites
There is no eAccelerator package in the official repositories, therefore we must compile and install it from the sources. Before we can do this, we need to install some prerequisites.
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How To Limit CPU Usage of A Process with cpulimit under Linux
In this tutorial I'll show you how you can limit the CPU usage of a process with cpulimit tool on Debian/Ubuntu Linux.
cpulimit is a program that limit the CPU Usage of a process (expressed in percentage, not in CPU Time). This is very useful to control batch jobs, when you don't want them to use to much CPU. cpulimit is able to adapt itself to the overall system load, dynamically and quickly.
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How To monitor Apache traffic in real-time with apachetop
Apachetop is a very useful program that displays the stats for Apache in real time. Apachetop can show you how many requests per second are coming in, what files have been accessed and how many times. It can also show you who is hitting the sites and where they are coming from.
1. Installing apachetop
To install apachetop in CentOS, Fedora:
# yum install apachetop
Make sure you have DAG repository enabled.
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