What is a mailman mailing list & how it works? Most of the academic and other institutes use mailman based mailing list to convey information between students and staffs. Organizations may have several mailing list to convey information between different groups of people. Each mailing list have a particular email address (say example-list1@organization.com, example-list2@organization.com etc)…
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What is WannaCry or WannaCrypt? WannaCry or WannaCrypt or WannCrypt0r 2 is a special short of malware (ransomware) that affects Windows PC. It encrypts files on local Hard disk, any connected USB drives and make them unusable. After first report on 12th May this malware has already affected over 230000 computers, ATM etc. Once affected…
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Introduction Here you're because you've lost your CentOS or RHEL root password. OMG..!! Don't be scared, we'll demonstrate how to reset that step wise with Image. Both RHEL/CentOS 6.x and 7.x is covered. The basic is editing the kernel before booting to force the system to start in single user mode. Then system will provide…
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Introduction: What is tunneling? In networking tunneling refers passing network traffic from source to destination via some intermediate. The intermediate may be a server or a network router which acts as gateway between source and destination. Way of interaction between gateway and destination server depends on the type of actual communication. Tunneling decides how the…
Read moreIntroduction When we want to write a client server program in C/C++, we need to clutter with huge amount of details like socket creation, configuring the server structure, configuring the client structure etc. Is there any simplification there? The answer is yes. RPC(Rempte Procedure Call) is one of the rescuier (Note: there are several other…
Read moreIntroduction Plesk is one of the most full featured control panel in web hosting industry. Due to availability in both Linux and Windows platform Plesk is the choice of many System Administrators. Right now the latest release of Plesk control panel is Plesk Onyx. While restarting or troubleshooting DNS server in Plesk Onyx Linux many…
Read moreIntroduction This short tutorial will demonstrate how to change default command line (bash) editor in Linux and Unix type operating system. Most of the Linux distribution comes with vim or vi as default bash editor. Both are powerful editor, but I don't like their interface. Here I'm going to demonstrate changing bash editor from vim to nano in CentOS…
Read moreIntroduction ISPManager is the most full featured cheap web hosting control panel. But most of the users find it's too small font size difficult to read. The control panel doesn't provide any web interface to change font size, font color and other style features. One obvious way is to increase font size of your browser.…
Read moreIntroduction Quality and price of a VPS (Virtual Private Server) depends on it's virtualization technology. Like XEN, VM Wire, KVM provides true virtualization and costly. On the other-hand now a days low end OpenVZ VPS are very cheap. This has severe performance impact. Unlike KVM, XEN etc. OpenVZ use container based virtualization and share same kernel installed…
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Internet is an integrated part with today's life. Imagine you've just wake up in morning. Waiting like crazy for a reply from someone in Facebook or Whatsapp. Then found your Internet connection is not working..!! How much irritating it will be..!! But indeed this happens frequently. So this post will discuss several possible reasons for…
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