The Linux Page

Help other users realize that everything is possible, especially avoiding Windows for their own personal use.

Welcome to The Linux Page

Fox Trot by Bill Amend. Click to enlarge.
Click to enlarge

This site is a collection of my own work with Linux. Certain things are easy, others take time to decipher and if I ever need to repeat the work (which usually happens!), then I need to remember everything by memory or... have a site with all the steps taken and to take again.

The following are my most recent posts:

Who is ZmEu?

An image showing ZmeuThe name Zmeu (no capital E) is the name of a fantastic creature of Romania. There are so many stories that there isn't a clear understanding of what it is... but it is human like, can spit fire and wants to marry young women.

If you're wondering, it is generally a bad guy.

ZmEu Attack

Today, I noticed a lot of traffic on one of my servers. Looking into what was happening, I immediately found out that an attacker was looking for a loophole in that system. That attack was being performed from China.

I checked another server, and sure enough, that other server was ...

Whenever you create a page, you at times notice that your text goes bye bye without telling you anything about the reason why it would do that.

The fact is that there are many reasons why this can happen. The following is here to remind me of the various possibilities that I've bumped into over time.

Text Color

The first one that got me many times is the color of the text. If that color is set to transparent or the same color as the background, then you won't see the text.

What I do to test that quickly is go to the block where the text is expected to appear and change the ...

As I was checking some logs, I found the laundry list of a robot checking out one of my websites: 54 hits. As we can see, it checks many paths, some of which it checked 2 or 3 times (the first number in my list is a count).

3 /apple-app-site-association
1 /cache/iph.php
1 /dbss.php
1 /ecss.php
1 /function-sync.php
1 /inlos.php
1 /sph.php
1 /tip.php
3 /.well-known/apple-app-site-association
3 /.well-known/assetlinks.json
1 /wp-content/plugins/another-wordpress-classifieds-plugin/AWPCP.po
1 /wp-content/plugins/auto-attachments/a-a.css
1 ...

Bad Documentation (if you ask me)

When you looks at the document of logrotate, the first page about the settings shows an example as follow:

/var/log/news/* {
    rotate 2
    olddir /var/log/news/old
        kill -HUP `cat /var/run/`

Making your think that it's okay to have an asterisk in this way, right? PLAINLY WRONG!

The logrotate utility actually has no heuristic to detect whether a file was already rotated or compressed so with an asterisk, it will discover all the files in a folder and ...

Today I spent hours trying to find out why one of my find_library() would fail.

I fixed the search implementation, to make it cleaner as a result, which is not a bad thing, but the problem was a -D on a cmake call that would define the value ahead of time. That is...

There is the search I used:

find_library( ADVGETOPT_LIBRARY advgetopt

This looks just fine and it should work, easy. I even added a test in my main CMakeLists.txt to see what would happen:

find_library( TEST_LIBRARY advgetopt
            PATHS ...

Today, I finally upgraded to SeaMonkey 2.49.1.

It was out on Nov 4, 2017 but I did not check for it any time sooner. Bad for me as there were some bugs in 2.48 that banks and such were warning about (oh and WordPress too...)

Anyway. I downloaded the new version. Extracted the files. Updated my icon with the new path. Click on the icon to open the browser. Nothing.

Today I needed to check a zone file to see why the IP address was wrong on one of my servers.

Sure enough, the IP was the old one (We switch servers about 9 months ago). Although once in a while I would get the right IP, the second name server still had the old IP. I thought the cache would be renewed more often than that, but I guess this is well optimized!

The error I made is not change the time info which means that the second name server never saw the change. This is just a domain name I redirect so I never noticed the problem before.

To check the cached file, though, I needed a way to ...

Functional Subscribe Form

Today I installed a simple mailing list builder on my Becoming an Internet Affiliate website. So simple that it creates a widget on the sidebar and that's it. So it's not going to be super persuasive, but I like it that way for some of my websites.

The plugin is called Mail Subscribe List. It's a free plugin making it particularly attractive. And it keeps the names and emails in your database (no third parties involved.)

The plugin offers a Widget that you can install in your sidebar. Go to

Appearance » Widgets

and then select the Subscribe ...

This happens on all websites. It's not specific to Wordpress.

However, this is when hackers are trying to gain access to your website. They do two or three things. First they choose common user names such as "admin" or your .com name (i.e. I have and they used "stargazerrock" as the username!) I saw "administrator" as well.

One way to protect your administrator account immediately is to change your username to something that they are not likely to guess. Say your surname is "giraffe", you could use that. Or even better, ...

Today I tested one of my Stargazer Rock blog pages and got a WSoD... Not the first time, but last time I fixed the problem by loading and resaving a PNG and changing an SVG to a PNG. Not the type of things I really want to do while bloging.

So I search into it, there is a plugin I use, called "Facebook Open Graph, Google+ and Twitter Card Tags" which attempts to load an image but only the first 32Kb. If that loads fine, then the author attempts to get the image dimensions and save that to the open graph meta data.

Somehow, some images will actually break that process because the ...

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