Check how secure your password is with: cracklib-check

Right now I am renewing some of my passwords, simply changing passwords of my accounts in sites that I created 6 months or 1 year ago, as it is not my intention to always leave the same password because… now I am renewing some.

A few moments ago I wrote an article about makepasswd and I had already written another about pwgen (I keep using this) but now I have the doubt: How secure are my passwords?

Although it is true that when using lower case, upper case, numbers and other characters it is known that really strong passwords are generated, it is always good for an application to tell you: «yes kid, your passwords are excellent»😀

For this there is the command cracklib check (belongs to the package libcrack2)

To install it simply install that package: libcrack2 (on Debian - » sudo apt-get install libcrack2 and in Ubuntu - » sudo apt-get install cracklib-runtime libcrack2)

Then we just have to pass the password and that's it, that is ... we execute it in a terminal:

sudo cracklib-check

They will see that it is waiting, that is, it only shows us the cursor to write ... there let's say for example: desdelinux.net and ... I leave you a screenshot that will surely help you understand:

As you can see, they write a password and press [Enter] and it will tell them how good / secure their password is, the criteria is based on whether the password contains NOT only letters, as well as different letters, etc.

Another way to check a password is using echo and passing the password with a pipe to cracklib-check, at the end of the screenshot I showed you how, basically:

echo "el-password-que-quieran-comprobar" | sudo cracklib-check

And well there is not much more to add, this I imagine you will find interesting 😀

regards