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If you often mount and access a remote NFS share on your system, you will probably want to know how to improve NFS file access performance. One possibility is using file caching. This tutorial describes how to enable local file caching for NFS shares by using cachefiles.

On any file system, deleting a file doesn’t necessarily mean that it is gone for good. When a file is removed, its meta data is gone, but actual file data is untouched inside the file system, until the location of the data is overwritten by other file data. This means that if you accidentally deleted a file, there is a chance that you can recover the file. This tutorial describes how to recover deleted files on Linux.

Meld is a visual diff and merge tool that can compare files, directories, and any version controlled projects. Meld offers two- and three-way diff and merge, as well as supports simple commands of major version control systems (e.g., SVN, Git, Mercurial, Bazaar). This tutorial describes how to diff and merge files and directories on Linux by using Meld.

One way to add personalization to the documents or presentations that you create in Linux desktop is via using custom fonts. In Linux desktop, you can download and add custom fonts to the desktop system as you wish. This tutorial describes how to install custom fonts in Linux desktop environment.

A hex editor can be useful in various cases, e.g., repairing disk image and partition, reverse-engineering binary code, patching emulator ROM files, analyzing malware, etc. This tutorial introduces a HEX editor called wxHexEditor which is available for Linux, Windows and MacOS X.

Amazon Web Services (AWS) EC2 is the most widely used pay-as-you-go type of elastic compute cloud. This guide describes how to run Ubuntu Desktop on Amazon EC2.

This tutorial describes how to access an SSH terminal in a web browser on Linux. Web-based SSH is useful when the firewall you are behind is so restrictive that only HTTP(s) traffic can get through.

Linux has its own share of Dropbox clients; CLI clients as well as GUI-based clients. Dropbox Uploader is an easy-to-use Dropbox CLI client written in BASH scripting language. This tutorial describes how to access Dropbox from the command line in Linux by using Dropbox Uploader.

On September 22nd this year, Fedora turned 10 years old. Since the historic announcement ten years ago, the Fedora Project has remained a massive volunteer-driven community effort that complements the Red Hat Enterprise Linux, and has led to several popular spin-offs such as CentOS and Scientific Linux. To celebrate its 10th birthday, I would like to share several interesting tidbits about Fedora Linux.

If you are looking for a cross-platform VNC client, you have two options: use either Java-based VNC viewers (e.g., RealVNC or TightVNC), or web-based VNC clients. Compared to Java-based VNC viewers, VNC web clients are typically faster than Java-based counterparts, and could easily be integrated into other third-party applications. This tutorial describes how to access VNC remote desktop in web browser by using VNC web client called noVNC.

There are several file mirroring tools on Linux, such as rsync or duplicati. However, these tools are meant for “uni-directional” file sync (i.e., pushing or pulling incremental updates in one direction). Unison is an open-source file synchronization tool that natively supports bi-directional file synchronization. This tutorial describes how to synchronize files between two servers with Unison command-line utility.

When you are running X applications over SSH, the encryption/decryption overhead of the SSH protocol may slow down the rendering of remotely running X applications. Furthermore, if an SSH session is established over a wide area network, X11 forwarding over SSH may become even slower due to network latency and throughput limitation. This tutorial describes some tips on how to speed up X11 forwarding in SSH over wide area networks.

Flickr has not released an official Linux client yet. So if you want to upload images to Flick on Linux, you have two options; use either Flickr’s web interface or third-party Linux Flickr uploaders. This tutorial explains how to upload pictures to Flickr by using a GUI-based Flickr upload tool called Postr.

This tutorial describes how to access Amazon S3 cloud storage from the command line in Linux by using the Amazon S3 command line client called s3cmd.

Earlier this year, GitHub reached a milestone in the history of open source project management by hosting 6 million projects over which 3.5 million people collaborate. You may wonder what the hottest open source projects are among those 6 million projects. In this post, I will describe 20 most popular open source projects that are hosted at GitHub.

If you want to know what video/audio codec are used for the video file you downloaded from somewhere, you can play the video itself with VLC or MPlayer. There are also command-line utilities that allow you to determine video properties quickly. This tutorial describes how to check video formats from the command line on Linux.

The increasing popularity of Linux and Linux-native gaming platforms such as Steam is bringing mainstream gaming to Linux. If you are a hardcore gamer, you will probably pay great attention to the performance of the graphics card on your system. This tutorial describes how to find information about a video card and video driver used in Linux system.

SFTP service provides secure file access and transfer mechanisms over SSH tunnels. This tutorial describes how to set up a secure SFTP server in Linux, by properly protecting the SFTP server from SFTP users, and isolating individual SFTP users from one another.

One of system resources to monitor closely as a system administrator is network connections. In order to maintain adequate networking performance on a server, you need to watch out for any abnormal behavior in network connections. This tutorial describes how to monitor active network connections, and how to count the number of open network connections on Linux.

Setting up a VPN typically requires using privileged access on all hosts involved (in order to create virtual network interfaces via TUN/TAP devices), as well as opening up additional VPN ports on any existing firewall. This tutorial describes how to set up a VPN over an existing SSH in Linux, by using a command-line tool called sshuttle.