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