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Emacs rectangle search/replace

Posted 08-21-2016 at 07:43 PM by flshope

I use Emacs to write code occasionally, mostly Fortran. A common thing I need to do is search and replace everywhere in a region confined to a rectangle within the text. An example is altering an existing code from Fortran 77 format to Fortran 90, specifically changing all of the Cs in column one (indicating comments) to !s. In Emacs terminology, this is a rectangle of width 1 character and as high as the number of lines in the code.

I have had difficulty figuring out how to do this...
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Old

Using an HP-2133 with an external display under Ubuntu 14.04

Posted 12-11-2015 at 09:23 AM by flshope
Updated 12-12-2015 at 07:49 PM by flshope (Fix typo)

This little note will be of interest to anyone (1) running an HP-2133 Mini-note PC (a little laptop), (2) with Ubuntu 14.04 and (3) Gnome Flashback, and (4) who wants to use it with an external Dell UltraSharp display. There must be maybe three such individuals (counting me) between earth and the Andromeda galaxy -- I include the end-points of the interval.

The 2133 has a nine-inch diagonal (viewable) screen. Although the display is crisp and readable, I am no longer pushing 70 (I'm...
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Old

Upgrade of 2003 machine to Debian 8 -- a bumpy ride

Posted 10-19-2015 at 10:53 AM by flshope

I have a 2003-vintage machine that remains useful despite its age, and I am determined to keep it running as long as I can as a backup to my main machine. The 2003 machine was born with Red Hat 9, migrated to Ubuntu, and finally to Debian 7 last December when Ubuntu dropped support for the display card.

Yesterday, after much study of the release notes,

https://www.debian.org/releases/stab...e-notes.en.txt

I decided to proceed with the upgrade...
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Old

idiosyncrasy (?) with gnuplot -- or just pilot error?

Posted 09-06-2015 at 10:56 AM by flshope

I just ran into the damnedest idiosyncrasy with gnuplot (http://www.gnuplot.info/). I was doing my routine spending/budget plots when suddenly gnuplot bombed with a cryptic message. I spent all morning figuring out what was wrong. In the end, as usual, it was pilot error ...

I am plotting a data file with up to 12 blocks of data (counted as 0, 1, 2, ..., 11), where each block is separated by a blank record. The command

Code:
plot "datafilename" every :::07::07
...
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Old

Anomalous KVM event: messed up screen colors

Posted 05-02-2015 at 11:01 AM by flshope

This morning when I booted up my primary machine and started Libre Office Calc, which I use for my To-Do List, I saw that all of the colors had been significantly changed. For example, the greens and yellows were almost the same and were almost fluorescent in flavor. All of the colors had a different tint. Most solid lines in the spreadsheet display seemed to have dark shadows. I didn't check any other display applications, like the Image Viewer.

I did notice just after initial power...
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