Debian Admin » Debian/Ubuntu Linux System Administration Tutorials,Howtos,Tips

Fix for High CPU usage when SNMP is enabled in Cisco Routers

Sep 042008

Cisco Routers and Switches with L3 routing functions are seen to have problems with High CPU usage when SNMP is enabled. This can range anything from 15% to 40%. According to Cisco, these are low priority processes and other priority processes requiring CPU cycles are given priority over these processes and this level of CPU utilisation can be is normal. However, it is always better to be safe than sorry and get the CPU utilisation caused by SNMP to bare minimum so as to ensure the Routers function smoothly.

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Howto use more than 4 GB RAM on Debian etch

General 6 Responses »

Aug 302008

Nowadays, many servers are running with 2-4 gigabytes of RAM, and their owners are discovering a problem: When they run 32-bit debian Linux distribution, their extra RAM is not being used. Fortunately, correcting the problem is only a matter of installing or building a kernel with a few specific parameters enabled or disabled.

Running Vhosts With Apache2 mpm-itk On Debian

Webserver 5 Responses »

Aug 272008

apache2-mpm-itk (just mpm-itk for short) is an MPM (Multi-Processing Module) for the Apache 2 web server. mpm-itk allows you to run each of your vhost under a separate uid and gid --- in short, the scripts and configuration files for one vhost no longer have to be readable for all the other vhosts.

Howto perform UDP tunneling through SSH connection

General, Security 13 Responses »

Aug 212008

In this tutorial we will are going to provide simple procedure how to to perform UDP tunneling through an SSH connection.Say you need to forward UDP packets between two remote networks securely.

Aria2 – high speed command line download utility in Debian

Free-Tools No Responses »

Aug 142008

aria2 is a utility for downloading files. The supported protocols are HTTP(S), FTP, BitTorrent (DHT, PEX, MSE/PE), and Metalink. It can download a file from multiple sources/protocols and tries to utilize your maximum download bandwidth.

Howto use SSH local and remote port forwarding

General 13 Responses »

Aug 062008

Port forwarding, or tunneling, is a way to forward otherwise insecure TCP traffic through SSH Secure Shell. You can secure for example POP3, SMTP and HTTP connections that would otherwise be insecure.

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