When you ‘re coding a new application…


Whenever you start coding a new application, you have to spend a considerable amount of your time to: Continue reading “When you ‘re coding a new application…”

Some utilities I’ve found lately

During the last three days I had the opportunity to ‘discover’ some utilities I didn’t know before and with this post I want to write down their names and some notes. Continue reading “Some utilities I’ve found lately”

Feature request for GooglePlay app

Yesterday I re-installed my android system and apps in my mobile phone.

After that, when I tried to get everything installed as before, I discovered that some of the apps I had installed in the past and were working without a problem are not now in the Play store.

I don’t know the reasons why they have been pulled out of the store, but I think that it would be a good practice for the Google Play app, when searching for updates, to display a warning when an application I have already installed in my phone suddenly ‘vanishes’ from the list of available apps.

Τα παιδιά των πρώτων

Ποια είναι η οικογένεια των αριθμών που μπορούν να γραφτούν ως Continue reading “Τα παιδιά των πρώτων”

New scam by sharing posts on Facebook / Πώς να αντιμετωπίσετε τη νέα απάτη στο Facebook

[Ακολουθεί και στην ελληνική γλώσσα]

In case you are the owner/manager of a Facebook page, you may already had a notification about one of your posts being shared by another page, which asks from you to confirm your account or get blocked!

This page claims to be “The Facebook Team” and asks you to visit a web-page in order to confirm your account.

DON’T click this URL!

Instead, report this page to Facebook 😉

  1. Visit the profile of this page by clicking on the name
  2. Click on the ellipsis button (the three dots) and select “Report page”
  3. Select “It’s harassing me or someone I know” (see side picture)
  4. When you are on the “What You Can Do” box, click all “Submit to Facebook for Review“, “Block [Page name]“, “Hide all From [Page name]” options.

Today (Thu 9 Mar 2017), I had two notifications for two of the pages I own/manage, so I thought it would be useful to inform any other owners/managers who may be notified also.  🍀


Πώς να αντιμετωπίσετε τη νέα απάτη στο Facebook

Αν διαχειρίζεστε κάποια σελίδα στο Facebook, σήμερα μπορεί να σας ήρθε κάποια ειδοποίηση ότι κάποια σελίδα κοινοποίησε κάποια δημοσίευση της σελίδας σας με το μήνυμα ότι πρέπει να επιβεβαιώσετε το λογαριασμό σας, αλλιώς κινδυνεύετε με μπλοκάρισμα! (Δείτε την πρώτη εικόνα στην αρχή του άρθρου)

Επειδή αυτές οι σελίδες το πιο πιθανό είναι να θέλουν να κλέψουν κωδικούς (λυπάμαι αλλά δεν επισκέφτηκα το σύνδεσμο που λέει να πατήσω), ΜΗΝ ΠΑΤΗΣΕΤΕ στο σύνδεσμο που σας εμφανίζει.

Αντίθετα, κάνετε τα εξής:

  1. Πατήστε πρώτα επάνω στο όνομα της σελίδας που κοινοποίησε τη δημοσίευσή σας.
  2. Πατήστε στο κουμπί με τα αποσιωπητικά (τις τρεις τελείες) και επιλέξτε «Αναφορά σελίδας»
  3. Στο παραθυράκι που θα εμφανιστεί επιλέξτε «Παρενοχλεί εμένα ή κάποιον που γνωρίζω»
  4. Στο νέο παραθυράκι με τίτλο «Τι μπορείτε να κάνετε» πατήστε με τη σειρά και στις 3 πρώτες επιλογές, ώστε (α) να υποβάλλετε στο Facebook τη σελίδα για εξέταση (ώστε να επιληφθούν της υπόθεσης), (β) να μπλοκάρετε τη σελίδα και (γ) να μη βλέπετε τυχόν άλλες δημοσιεύσεις της.


Σήμερα (Πέμπτη) είχα δύο παρόμοια περιστατικά σε δύο από τις σελίδες που διαχειρίζομαι (από δύο διαφορετικές σελίδες με πολύ γενικές επωνυμίες — φαίνονται στις εικόνες) κι έτσι θεώρησα καλό να καταγράψω τον τρόπο αντιμετώπισης. 🍀

Variety wallpaper changer on Ubuntu 14.04

After upgrading to Ubuntu 14.04, I noticed that Variety, the desktop wallpaper changer I’m using, stopped updating the desktop wallpaper (xfce here), although it continued to change the photos (by updating the application’s indicator icon).

So, I started looking into the details and I found that I had to change two lines in ~/.config/variety/scripts/set_wallpaper script.


xfconf-query -c xfce4-desktop -p /backdrop/screen0/monitor0/image-path -s “” 2> /dev/null
xfconf-query -c xfce4-desktop -p /backdrop/screen0/monitor0/image-path -s “$WP” 2> /dev/null


xfconf-query -c xfce4-desktop -p /backdrop/screen0/monitorLVDS/workspace0/last-image -s “” 2> /dev/null
xfconf-query -c xfce4-desktop -p /backdrop/screen0/monitorLVDS/workspace0/last-image -s “$WP” 2> /dev/null

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Duplicity fails on 3GB /tmp

Backup application Duplicity has just filled up my /tmp, located on / partition with 3GB free space, during verification of a full backup and, finally, reported ‘failure’!
After quitting Duplicity, I have 1GB less free space on my / partition.

I wonder how much bigger the /tmp space need to be…


Update [2013/11/19]:

I’ve found the ‘lost’ GB into ~/.cache/deja-dup directory [naturally] (or /root/.cache/deja-dup if it runs under gksudo), but I still don’t know why 3 GB of temporary space are not enough.

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Yet another list of RSS feed readers

So, Google Reader is closing down its services tomorrow and the vast majority of its users have already chosen their next reader for their RSS feeds, since many bloggers and news sites have written about the alternatives.

Continue reading “Yet another list of RSS feed readers”

“Hidden” gems of VLC

Today I found out the power of the “Devices” items in the VLC application.
With that I mean the option to record:

  • a videocast with the computer’s camera [Video capture]
    Video effects, although can be seen on screen, are not recorded.
  • the usage of some application through its window (or the whole desktop, if you like) [Screen capture]

Audio capture didn’t worked for me; maybe it’s a configuration thing or a conflict, since video recordings had also no audio at all.

[Article copied from a Drupal blog I used to have; now deleted]

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“Bad request Error 400” for GMail on Firefox

For the last 2-3 days I had an unusual situation to deal with. Whenever I tried to visit my GMail account using Firefox, the response was:

Bad request
Error 400

 At first I checked with the other browsers (Chrome, Opera and Midori) I have installed on my system. All connected without reporting anything.
Then, my next guess was misbehaving addons, but as I tweeted:

So, what is wrong with #GMail on #Firefox today? “Bad request Error 400” (even with all addons disabled)
— A. P. Tsompanopoulos (@aptlogs) March 22, 2012

Since that approach didn’t helped either, I decided to remove the GMail-related cookies. I used the “Remove cookie(s) for Site” addon and it deleted 78 cookies I had for GMail.

Unfortunately, I don’t know which cookie was the “bad” one, but after deleting them I was again able to reconnect without problem.

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