Month: February 2010

How To : FTPS Server Configuration in Linux

I astonish all the time when I see the FTP package name. vsftpd which abbreviated to Very Secure File Transfer Demon(vsftpd). But when we see the security prospective of this package there is no much security included with this package. I mean when you login to server the credentials are transferred in plain text. This is the reason by default root user is not allowed to login to ftp server. To eliminate transferring data/user credentials in plain text and to encrypt the entire transmission we can take help from openssl to generate a certificate and use SSL certificate when...

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Converting Sun Virtualbox vmi file To Vmware vmdk file

This article show you how to convert Sun Virtualbox vmi file to Vmware vmdk file. Recently I have started using Ubuntu as my desktop in my company. And installed Sun Virtualbox for test VMs. But most of the people have vmplayer installed. So they donot know how to use this vmi images on a windows box. So here is a solution for converting those vdi image files to VMware .vmdk images. When we install Sun Virtualbox we have so many command lines tools installed along with it. One good tool is VBoxManage, Please remember commands in Linux are case sensitive. So if you try to type vboxmange it will not work. You have to type exactly as VBoxManage. Step1 : Convert from vdi to raw.#VBoxManage internalcommands converttoraw /data/Vm-images/ubuntu-vm.vdi /data/Vm-images/ubuntu.raw Step2 : Now install qemu, which is used to convert .raw files to .vmdk#apt-get install qemu Step3 : Convert .raw files to .vdmk using qemu-img command#qemu-img convert -O vmdk /data/Vm-images/ubuntu.raw /data/Vm-images/ubuntu.vmdknow try to access this .vmdk file using your VMware workstation or VMware player. So what about viseversa?here there are two methods are there 1. By default your Sun Virtualbox will support .vmdk vmware images.2. If its not supported use the following way. Step1 : Use again qemu-img to convert .vmdk disk to .rawqemu-img convert ubuntu.vmdk /tmp/ubuntu.raw Step2 : VBoxManage convertdd /tmp/ubuntu.raw ubuntu.vdiplease share your thoughts. Please visit for...

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File types In Linux/Unix explained in detail.

"How many types of files are there in Linux/Unix and what are they?" This is a common question to every person who starts to learn Linux. O.K, why is it that much important to know file types? Answer: This is because Linux considers every thing as a file. When ever you start working on Linux/Unix box you have to deal with different file types to effectively manage them. How many types of file are there in Linux/Unix? By default Unix have only 3 types of files. They are.. Regular files Directory files Special files(This category is having 5 sub types in it.) So in practical we have total 7 types(1+1+5) of files in Linux/Unix. And in Solaris we have 8 types. And you can see the file type indication at leftmost part of “ls -l” command. Here are those files type. Regular file(-) Directory files(d) Special files Block file(b) Character device file(c) Named pipe file or just a pipe file(p) Symbolic link file(l) Socket file(s) For your information there is one more file type called door file(D) which is present in Sun Solaris as mention earlier. A door is a special file for inter-process communication between a client and server (so total 8 types in Unix machines). We will learn about different types of files as below sequence for every file type. Definition and information of the file type...

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How to : Confiugre Pidgin To Connect Microsoft OCS/LCS IM Server

Note:I am seeing so many people visiting this page, but leaving early.. please feel free to comment at comment section what problems you faced in installing PIDGIN, i am very much interested in helping you.. Good news for all the Linux lovers who are working in Corporate companies where most of the communication is through Microsoft OCS(Office Communicator Software)/IBM Same time IM clients. OCS is primarily used for IM communications, but if you want to use OCS in Linux its not possible till this point. Recently Pidgin started supporting SIP(Session Initiation Protocol) Protocol. So for the people how know about MS OCS. Here is the short notes for you. MS OCS is a proprietary software is an enterprise real-time communications server, providing the infrastructure for enterprise instant messaging, presence, file transfer, Peer to peer and multi-party voice and video calling, ad hoc and structured conferences (audio, video and web) and PSTN connectivity. These features are available within an organisation, between organisations, and with external users on the public Internet, or standard phones, on the PSTN as well as SIP trunking. Its little bit tricky to install and use it. Here are the steps how to accomplish this. Note : By default Pidgin will not support MS OCS. We require a third party ( pidgin-sipe) to accesses MS OCS. Step1 : Check if pidgin is installed or not, From...

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How To : Linux Terminal Server Project (LTSP)

Guest post by Sandeep Yadav( He is having 2+ years of experience in Linux administration and he is a good at automating system admin task through shell scripting. You can reach him at [email protected] I will tell you how we can configure LTSP server for our lab with telnet, rdesktop, shell and startx ( for Linux log in).Step1 :a. Make sure DHCP server is installed and running properly on your systemb. Now install tftp server also on your machine and you can find it’s rpm on your Redhat DVD (5.0)c. Now install rdesktop rpm and it is also you can find on your redhat DVD (5.0)d. Configure your windows xp system with full terminal and remote desktop support for distribute rdesktop also over the network so that client can be run windows xp.e. Now download ltsp-4.1.0-1_2.iso image from it’s website ( and my package size is 100MB (apprx.).f. Now I am making dir test in filesystem (/) and extract this package in test directoryg. Now open readme file from test folder and read instructions carefully on how to install this package.h. After installation complete you need to configure ltsp server . Step 2 :Configure tftp for ltsp serverTFTP : TFTP is a simple file transfer protocol, used by ltsp to transfer the kernel to the workstations.XINETD : Xinetd is a powerful replacement for inetd, with advanced features, used by...

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