Today's Question:  What are you most afraid of as a programmer?        GIVE A SHOUT

  WRITE ARTICLE

 LINUX/UNIX


  Networking Terminologies

Portmaps sudo apt-get install -y portmap Portmap is a part of ONC RPC (Open Network Computing Remote Procedure) collection of software for implementing remote procedure calls between Computer Programs. It is widely used by NFS (Network File System) and NIS. Portmap is a server that converts RPC program number to DARPA protocol port number. It must be used in order to make RPC calls. Network Infomation Service (NIS) sudo apt-get install -y nis NIS is a client server directory service provi...

1,691 0 0          LINUX NETWORK PROGRAMMING NETWORK FILE SYSTEM


  New Linux kernel fixes power-saving issues

Greg Kroah-Hartman has released long-term kernel 3.0.20 and stable kernel 3.2.5. Both contain just a single bug fix that allows PCIe power-saving technology ASPM (Active State Power Management) to be used on systems with a BIOS that activates ASPM on some components, but states in the FADT (Fixed ACPI Description Table) consulted by Linux that ASPM is not supported. According to Matthew Garrett, who developed the patch, the change can reduce the power consumption of a Thinkpad X220 by 5&nbs...

6,490 0 0          LINUX KERNEL POWER SAVING FIX


  Vim anti-patterns

The benefits of getting to grips with Vim are immense in terms of editing speed and maintaining your “flow” when you’re on a roll, whether writing code, poetry, or prose, but because the learning curve is so steep for a text editor, it’s very easy to retain habits from your time learning the editor that stick with you well into mastery. Because Vim makes you so fast and fluent, it’s especially hard to root these out because you might not even notice them, but it’s worth it. ...

1,769 0 0          VIM MACRO SYNTAX ANTI-PATTERN


  Using vi key bindings in bash and zsh

Takeaway: If you prefer to use vi or vim for command-line editing, you can configure shells to use vi key bindings instead of emacs-style key bindings. Here’s how. By default, most shells use emacs-style key bindings for command-line editing and modification. For users of vi or vim, however, you can instead configure shells to use vi key bindings instead. This is done by editing ~/.bashrc in the case of bash, or ~/.zshrc in zsh and ad...

3,017 0 0          LINUX BASH VI ZSH KEY BINDING


  SSH Security and You - /bin/false is *not* security

Backstory While at RIT around 2004 or 2005, I discovered that a few important machines at the datacenter allowed all students, faculty, and staff to authenticate against them via ssh. Everyone's shells appear to be set to /bin/false (or some derivative) on said machines, so the only thing you'll see after you authenticate is the login banner and your connection will close. I thought to myself, "Fine, no shell for me. I wonder if port forwarding works?" ...

3,698 0 0          SECURITY LINUX SSH /BIN/FALSE


  Why, oh WHY, do those #?@! nutheads use vi?

Yes, even if you can't believe it, there are a lot fans of the 30-years-old vi editor (or its more recent, just-15-years-old, best clone & great improvement, vim). No, they are not dinosaurs who don't want to catch up with the times - the community of vi users just keeps growing: myself, I only got started 2 years ago (after over 10 years of being a professional programmer). Friends of mine are converting today. Heck, most vi users were not even born when...

1,643 0 0          LINUX ADVANTAGE HISTORY VIM VI


  Useful Bash Scripts

Many people hack together shell scripts quickly to do simple tasks, but these soon take on a life of their own. Unfortunately shell scripts are full of subtle effects which result in scripts failing in unusual ways. It's possible to write scripts which minimise these problems. In this article, I explain several techniques for writing robust bash scripts. Use set -u ...

3,964 0 0          LINUX COMMAND SHELL BASH ROBUST


  Why I Use Vim

I've been using MacVIM as my editor of choice for a couple of years now, yet in many ways I still feel like a beginner. Every day I am learning more and more about my editor, but it takes a conscious effort to become proficient with an editor like Vim. Here's why I make that effort. Editors are something that are very personal; they have to fit with your own work flow approach to programming. If you have ever stopped to think about it, the way each person goes about editing text is quite differe...

2,168 0 0          FEATURE VIM EDITOR