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How to stop spammer sending email using squid

Have you spotted your squid log files of any spammer attempts trying to send email from squid port?Well, one dirty way of checking your squid logs of these spammer attempts trying to send emails using tunnelled SMTP via squid port. # cat /var/log/squid/access.log* | grep ‘\:25′ Here’s a few line samples: ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 1179265950.734 0…)

How to recover root password on linux

Finally, the well known root password recovery is here to stay. This old time favorite superuser root password recovery in linux comes as handy as a toolbox. Recovering root password in linux is as handy as newbie users during the very first linux installations. The simplest way to recover root password before kernel can be(…)

How to retrieve GMail emails via terminal using fetchmail

This entry will cover a one shot linux fetchmail command of retrieving GMail email messages using terminal without any further fetchmail configuration setup. Read on. Fetchmail is one good linux tool for fetching and retrieving remote emails. Fetchmail works and retrieves emails from remote email servers and downloads them locally into your local linux box.(…)

How to remove spaces from filenames – Linux

Let us assume that we have a situation where in your boss wants you to remove all spaces from his MP3/OGG/WMV/MPG filenames and replace them with underscore character. To accomplish this task of replacing space character with underscore character is real easy for a common linux task and can be easily done using linux renaming(…)

How to enable and disable of telnet service

The telnet command is used to communicate with another host using the TELNET protocol. If telnet is invoked without the host argument, it enters command mode, indicated by its prompt ( telnet>). In this mode, it accepts and executes the commands listed below. If it is invoked with arguments, it performs an open command with(…)

How to block yahoo chat messenger

A very old tip and trick on blocking yahoo chat messenger from connecting to internet, as per request. Considering an approved management policies, there are several ways to block yahoo chat messenger from connecting to internet coming from inside your network, depending on what equipment and boxes you have on ground. If you happen to(…)

How to Secure Your Browser with WOT

Why Secure Your Web Browser? Today, web browsers such as Internet Explorer, Mozilla Firefox, and Apple Safari (to name a few), are installed on almost all computers. Because web browsers are used so frequently, it is vital to configure them securely. Often, the web browser that comes with an operating system is not set up(…)

How To Convert White Spaces To Line Break

At times, when dealing with text file that contains numeric values that are separated by white space, there is a need to convert white spaces between numbers into line breaks or new lines. Here’s a quick tip on how to convert white space to new lines or line breaks. As an example, a created text(…)

How to secure router or ADSL modem?

This article written on 20/09/2008 by Dinesh Suryavanshi, Sometimes we ignore little details, which is a bad thing – because others can use our negligence against us.Most routers and ADSL modems come with a web interface that is used to control and configure the device. The administration panel is accessed with a web-browser, and it(…)

How to Split and Merge Multiple Linux Files

Considering that you have 50MB of single file. Your friend needs it urgently. The situation shows that the ONLY means of transferring this large file between you and your friend is thru email exchanges. The problem is both your ISP limits the size of email attachments to 5MB file attachments. How to transfer 50MB large(…)

How to Convert PDF to HTML/XML/PNG in Linux

Here’s a quick howto on converting PDF files into HTML file. PDFtoHTML linux tool converts PDF files into multiple file formats like HTML, XML, and PNG images. By default usage, the output is written to current working folder. PDFtoHTML linux tool is based on XPDF version 3.00. PDFtoHTML PDF converter tool is part of poppler-utils(…)

3 Easy Install Steps of Microsoft Fonts in Fedora 8

There are nice fonts included with the default Fedora 8 X installation. Some people love it, others want more. If you are fond of using Microsoft fonts, here’s a quick entry on how to have microsoft fonts installed from your Fedora 8 box. Three easy steps on how to install Microsoft Fonts in Fedora 8.(…)