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Plot bar charts using gnuplot (part 3/3)

Parts one and two of this series illustrate how to use gnuplot to plot a two-dimensional point graph with time-series data. This post, the third and final of the series, focuses on plotting a bar chart. The raw input data consists of the daily number of page views, and clicks for this blog from 2005 to 2014:

gnuplot explained (part 2/3)

Part 1 of this series presented a gnuplot script to plot the following two-dimensional graph. This post continues the discussion of the commands in the script.

How to plot 2D data using gnuplot

As the publisher of this web site, I am interested in visualizing readership growth over time. With that in mind, I set out to plot the number of page views and clicks over time. Linux is well stocked with data plotting software. This 3-part series introduces gnuplot, a command-line tool, to plot two-dimensional time-series data. Parts 1 and 2 explain how to plot a points graph; part 3, a bar chart.

Redirect local emails to a remote email account

My previous post is a guide for setting up exim4, an SMTP mail server, to use Gmail as a smarthost. One reason for setting up a mail server is to redirect my local root emails to an Internet email account that I actually monitor. In this way, I won't miss any security alert sent to the local root mailbox. This post shows you how to set up email redirection.

How to setup exim4 on Debian to use Gmail

Why bother configuring an SMTP mail server on your Linux desktop? Especially if you can send and receive all your emails within a web browser using your Gmail account, or with an email client such as Thunderbird. My reasons are twofold:

  • Some applications running on my desktop require SMTP to be set up. My desktop computer is used to stage a WordPress blog. For WordPress to send email, an SMTP server is required.
  • To redirect local root emails.

Burn DVD from an iso image

You have backed up a DVD to your hard drive in ISO format. Now, you want to burn a DVD from that image. This post illustrates how, first using the command line, then the GUI. Command Line Insert the DVD disc, and issue one of the following commands to burn a disc.

  1. growisofs To install growisofs, $ sudo apt-get update$ sudo apt-get install growisofs

Backup DVDs using K3b

My previous post explains how to backup and playback a DVD from an iso image file in the hard way - using the command line. Now, I discuss how to do it with K3b, a GUI tool. K3b is a tool from the KDE desktop environment. For Debian users, install it as follows: $ sudo apt-get install k3b Backup

  1. Run K3b.

Backup and playback DVD from hard drive using command line

This post is about how to backup and playback DVD content on a hard drive using the command line.

  1. Check available space on hard drive. $ df -hFilesystem Size Used Avail Use% Mounted onrootfs 1.4T 41G 1.2T 4% /udev 10M 0 10M 0% /devtmpfs 1.6G 900K 1.6G 1% /run/dev/disk/by-uuid/6c30b 1.4T 41G 1.2T 4% /tmpfs 5.0M 0 5.0M 0% /run/locktmpfs 9.6G 640K 9.6G 1% /run/shm

Increase font size of virtual terminals

My earlier post shows how to change, on the fly, the font size of X terminal emulators. Besides terminal emulators, Linux provides six virtual terminals which you can bring up from X Window by pressing Control+Alt+F1 to Control+Alt+F6 keys respectively. This post explains how to adjust the font size of virtual terminals for Debian, Ubuntu, and their derivatives.

How to change font size of terminal emulators on the fly

There is no shortage of Linux X Window terminal emulators. For a power user who works long hours with the terminal, it is important to know how to zoom in, that is, make the text larger. Your strained eyes will thank you for it. The table below summarizes how to increase and decrease the font size on the fly for an non-exhaustive list of terminal emulators.

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