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Opera browser – multiple profiles .

The Opera browser let you to use multiple profiles.
This feature allow you to have a new clean profile by select a folder profile.
To use this feature you need to start from folder where the Opera browser is install with this command.

This will start the Opera browser the same way as in the first installation.

Windows 10 – SubInACL tool.

This tool can be found at microsoft website and is a powerful tool.
After install the tool complete html documentation with useful examples.
You must run this command with administrator privileges.
Also they tell us about this tool:
SubInACL is a command-line tool that enables administrators to obtain security information about files, registry keys, and services, and transfer this information from user to user, from local or global group to group, and from domain to domain.

For example, if a user has moved from one domain (DomainA) to another (DomainB), the administrator can replace DomainA\User with DomainB\User in the security information for the user’s files. This gives the user access to the same files from the new domain.

SubInACL enables administrators to do the following:

Display security information associated with files, registry keys, or services. This information includes owner, group, permission access control list (ACL), discretionary ACL (DACL), and system ACL (SACL).
Change the owner of an object.
Replace the security information for one identifier (account, group, well-known security identifier (SID)) with that of another identifier.
Migrate security information about objects. This is useful if you have reorganized a network’s domains and need to migrate the security information for files from one domain to another.

For example:

come with infos like :

Blender 3D – new text effect strip.

This new option is available from Blender 3D version 2.76 and let you to add a text effect strip into your video using Video Editing layout.
Select the Video Editing from Screen layout check box .
Next, you can add the text effect strip from Add – Effect Strip – Text, see the next image:

News: New released LibreOffice version 6.0 .

As we know the LibreOffice is a good tool for most of office tasks.
Now this tool come with a new version and new features.
Two of this allow us to implemented a new import filter from QuarkXPress v.3, v.4. and a new export filter to format EPUB file format.
We can read more about the new version of the LibreOffice tool from release notes.

Go – simple or not.

In this tutorial I will show you how important it is to read the documentation in programming.
I’ll start with a simple command to detect the go language version

Most will say there are improvements and it is normal to know them.
Some of them will think that implementation is not obvious at a more general level and does not affect basic issues.
Let’s continue with the following example:

Obviously the word “Probably” will ask us a question mark.
Here’s what the documentation tells us:

func (*Int) ProbablyPrime
func (x *Int) ProbablyPrime(n int) bool
ProbablyPrime reports whether x is probably prime, applying the Miller-Rabin test with n pseudorandomly chosen bases as well as a Baillie-PSW test.

If x is prime, ProbablyPrime returns true. If x is chosen randomly and not prime, ProbablyPrime probably returns false. The probability of returning true for a randomly chosen non-prime is at most ¼ⁿ.

ProbablyPrime is 100% accurate for inputs less than 2⁶⁴. See Menezes et al., Handbook of Applied Cryptography, 1997, pp. 145-149, and FIPS 186-4 Appendix F for further discussion of the error probabilities.

ProbablyPrime is not suitable for judging primes that an adversary may have crafted to fool the test.

As of Go 1.8, ProbablyPrime(0) is allowed and applies only a Baillie-PSW test. Before Go 1.8, ProbablyPrime applied only the Miller-Rabin tests, and ProbablyPrime(0) panicked.

About prime numbers:

When a number has more than two factors it is called a composite number. Here are the first few prime numbers: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199

Although both Baillie-PSW test and Miller-Rabin tests, solve the same problem.
Knowing which version we have, we can see what is important for programming.
Also, the information like: ProbablyPrime is 100% accurate for inputs less than 2⁶⁴ are very important from a mathematical point of view.