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From: darksun <lujun9972@gmail.com>
Date: Wed, 6 Mar 2019 19:11:06 +0800
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+[#]: collector: (lujun9972)
+[#]: translator: ( )
+[#]: reviewer: ( )
+[#]: publisher: ( )
+[#]: url: ( )
+[#]: subject: (How To Check Password Complexity/Strength And Score In Linux?)
+[#]: via: (https://www.2daygeek.com/how-to-check-password-complexity-strength-and-score-in-linux/)
+[#]: author: (Magesh Maruthamuthu https://www.2daygeek.com/author/magesh/)
+
+How To Check Password Complexity/Strength And Score In Linux?
+======
+
+We all know the password importance. It’s a best practices to use hard and guess password.
+
+Also, i advise you to use the different password for each services such as email, ftp, ssh, etc.,
+
+In top of that i suggest you guys to change the password frequently to avoid an unnecessary hacking attempt.
+
+By default RHEL and it’s clone uses `cracklib` module to check password strength.
+
+We are going to teach you, how to check the password strength using cracklib module.
+
+If you would like to check the password score which you have created then use the `pwscore` package.
+
+If you would like to create a good password, basically it should have minimum 12-15 characters length.
+
+It should be created in the following combinations like, Alphabets (Lower case & Upper case), Numbers and Special Characters.
+
+There are many utilities are available in Linux to check a password complexity and we are going to discuss about `cracklib` module today.
+
+### How To Install cracklib module In Linux?
+
+The cracklib module is available in most of the distribution repository so, use the distribution official package manager to install it.
+
+For **`Fedora`** system, use **[DNF Command][1]** to install cracklib.
+
+```
+$ sudo dnf install cracklib
+```
+
+For **`Debian/Ubuntu`** systems, use **[APT-GET Command][2]** or **[APT Command][3]** to install libcrack2.
+
+```
+$ sudo apt install libcrack2
+```
+
+For **`Arch Linux`** based systems, use **[Pacman Command][4]** to install cracklib.
+
+```
+$ sudo pacman -S cracklib
+```
+
+For **`RHEL/CentOS`** systems, use **[YUM Command][5]** to install cracklib.
+
+```
+$ sudo yum install cracklib
+```
+
+For **`openSUSE Leap`** system, use **[Zypper Command][6]** to install cracklib.
+
+```
+$ sudo zypper install cracklib
+```
+
+### How To Use The cracklib module In Linux To Check Password Complexity?
+
+I have added few example in this article to make you understand better about this module.
+
+If you are given any words like, person name or place name or common word then you will be getting an message “it is based on a dictionary word”.
+
+```
+$ echo "password" | cracklib-check
+password: it is based on a dictionary word
+```
+
+The default password length in Linux is `Seven` characters. If you give any password less than seven characters then you will be getting an message “it is WAY too short”.
+
+```
+$ echo "123" | cracklib-check
+123: it is WAY too short
+```
+
+You will be getting `OK` When you give good password like us.
+
+```
+$ echo "ME$2w!@fgty6723" | cracklib-check
+ME!@fgty6723: OK
+```
+
+### How To Install pwscore In Linux?
+
+The pwscore package is available in most of the distribution official repository so, use the distribution package manager to install it.
+
+For **`Fedora`** system, use **[DNF Command][1]** to install libpwquality.
+
+```
+$ sudo dnf install libpwquality
+```
+
+For **`Debian/Ubuntu`** systems, use **[APT-GET Command][2]** or **[APT Command][3]** to install libpwquality.
+
+```
+$ sudo apt install libpwquality
+```
+
+For **`Arch Linux`** based systems, use **[Pacman Command][4]** to install libpwquality.
+
+```
+$ sudo pacman -S libpwquality
+```
+
+For **`RHEL/CentOS`** systems, use **[YUM Command][5]** to install libpwquality.
+
+```
+$ sudo yum install libpwquality
+```
+
+For **`openSUSE Leap`** system, use **[Zypper Command][6]** to install libpwquality.
+
+```
+$ sudo zypper install libpwquality
+```
+
+If you are given any words like, person name or place name or common word then you will be getting a message “it is based on a dictionary word”.
+
+```
+$ echo "password" | pwscore
+Password quality check failed:
+ The password fails the dictionary check - it is based on a dictionary word
+```
+
+The default password length in Linux is `Seven` characters. If you give any password less than seven characters then you will be getting an message “it is WAY too short”.
+
+```
+$ echo "123" | pwscore
+Password quality check failed:
+ The password is shorter than 8 characters
+```
+
+You will be getting `password score` When you give good password like us.
+
+```
+$ echo "ME!@fgty6723" | pwscore
+90
+```
+
+--------------------------------------------------------------------------------
+
+via: https://www.2daygeek.com/how-to-check-password-complexity-strength-and-score-in-linux/
+
+作者：[Magesh Maruthamuthu][a]
+选题：[lujun9972][b]
+译者：[译者ID](https://github.com/译者ID)
+校对：[校对者ID](https://github.com/校对者ID)
+
+本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
+
+[a]: https://www.2daygeek.com/author/magesh/
+[b]: https://github.com/lujun9972
+[1]: https://www.2daygeek.com/dnf-command-examples-manage-packages-fedora-system/
+[2]: https://www.2daygeek.com/apt-get-apt-cache-command-examples-manage-packages-debian-ubuntu-systems/
+[3]: https://www.2daygeek.com/apt-command-examples-manage-packages-debian-ubuntu-systems/
+[4]: https://www.2daygeek.com/pacman-command-examples-manage-packages-arch-linux-system/
+[5]: https://www.2daygeek.com/yum-command-examples-manage-packages-rhel-centos-systems/
+[6]: https://www.2daygeek.com/zypper-command-examples-manage-packages-opensuse-system/