Technology

How to check if an email address exists an is reachable

This is a common occurrence where you receive at least one rejection email with the following Message Delivery Status (or Subsystem), as a result of sending it to a problematic or non-existing address.   So to check if an address actually exists or  ‘receives’ mail you could simply send an email to that address (with the ‘delivery notification’ flag active) …

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How to verify disc health with a smart control (HDD-SSD)

There are many tools to check the health of hard drives, which detect S.M.A.R.T. diagnostic data and report if there are any deterioration or other problems.    SMART stands for “Self Monitoring Analysis and Reporting Technology” and works only if supported/enabled by BIOS/UEFI.   Many times this data has to be taken with precaution, since a ‘passed’ test does not …

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How to replace the Debian desktop on RaspberryPi

While using your RaspberryPi intensively, you may find yourself in an unfortunate situation where the X server fails to boot up.  There may be several causes: a crash, deletion of system files, or a failed update.    In all cases, when starting up, you would see an error like the one below, which notifies us of the failure to start …

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Facebook: deactivate photo tag suggestions

Facebook has long since introduced facial recognition of photographs to facilitate TAG activity for users.  This means that when you add a photo with friends/parents/etc… the system recognises their faces directly in the photo and suggests the tags to insert.  Obviously the function is two-way, as your acquaintances will also be able to tag you by suggestion.   If you want to disable this feature, and thus prevent Facebook scripts from analyzing other people’s photos by looking for your face, you can do the following:  On Facebook, at the top, next to the padlock symbol,  there is a small arrow pointing downwards, click on it and go to ‘Settings’.  In the new page that opens, from the left panel go to ‘Journal and added tags’   go to the ‘How do I manage people’s added tags and tag suggestions’ section  …

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Connection strings for databases, a practical list with categories

A practical list with the most used connection strings divided into categories:    Microsoft SQL Server 20xx  STANDARD SECURITY  Server=myServerAddress;Database=myDataBase;User Id=myUsername;  Password=myPassword;  TRUSTED CONNECTION  Server=myServerAddress;Database=myDataBase;Trusted_Connection=True;  CONNECTION TO AN INSTANCE  Server=myServerName\myInstanceName;Database=myDataBase;User Id=myUsername; Password=myPassword;  CONNECTION VIA IP ADDRESS  Data Source=190.190.200.100,1433;Network Library=DBMSSOCN; Initial Catalog=myDataBase;User ID=myUsername;Password=myPassword;  ASYNCHRONOUS PROCESSING  Server=myServerAddress;Database=myDataBase;Integrated Security=True; Asynchronous Processing=True;  WITH MARS (Multiple Access Result Set)  Server=myServerAddress;Database=myDataBase;Trusted_Connection=True; MultipleActiveResultSets=true; Access  STANDARD SECURITY  Provider=Microsoft.ACE.OLEDB.12.0;Data Source=C:\myFolder\myAccessFile.accdb; …

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