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+# Generate a strong password from the command line
+
+
+ ![generate-a-strong-password-from-the-command-line](https://www.rosehosting.com/blog/wp-content/uploads/2016/10/generate-a-strong-password-from-the-command-line.jpg) 
+
+Having a strong password is the most important thing you can do to protect your account or server and to keep your data secure. Common thinking is that a strong password should be comprised of at least 14 characters, including lowercase and uppercase alphabetic characters, numbers and symbols and should never be based on a dictionary word. Using a long password is much more secure that using a short one, the longer the password the harder it is to guess. In this post, we will take a look at a several different ways to generate a strong password using the Linux command line.
+
+### Generate a strong password with openssl
+
+This method uses the openssl rand function and it will generate 14 characters random string:
+
+```
+openssl rand -base64 14
+```
+
+### Generate a strong password with urandom
+
+In this method we will filter the `/dev/urandom` output with `tr` to delete unwanted characters and print the first 14 characters:
+
+```
+< /dev/urandom tr -dc A-Za-z0-9 | head -c14; echo
+```
+
+### Generate a strong password with pwgen
+
+`pwgen`is a tool that generates random, meaningless but pronounceable passwords.
+To install `pwgen` run:
+
+```
+sudo apt-get install pwgen
+```
+
+Once the installation is complete, use the following command to generate a random string of 14 characters:
+
+```
+pwgen 14 1
+```
+
+You can also use some of the following flags:
+<small style="transition: height 0.15s ease-out, width 0.15s ease-out; font-size: 14.45px;"></small>
+
+```
+  -c or --capitalize
+        Include at least one capital letter in the password
+  -A or --no-capitalize
+        Don't include capital letters in the password
+  -n or --numerals
+        Include at least one number in the password
+  -0 or --no-numerals
+        Don't include numbers in the password
+  -y or --symbols
+        Include at least one special symbol in the password
+  -s or --secure
+        Generate completely random passwords
+  -B or --ambiguous
+        Don't include ambiguous characters in the password
+  -h or --help
+        Print a help message
+  -H or --sha1=path/to/file[#seed]
+        Use sha1 hash of given file as a (not so) random generator
+  -C
+        Print the generated passwords in columns
+  -1
+        Don't print the generated passwords in columns
+  -v or --no-vowels
+        Do not use any vowels so as to avoid accidental nasty words
+
+```
+
+### Generate a strong password with gpg
+
+We can also use the `gpg` tool to generate a strong 14 characters password:
+
+```
+gpg --gen-random --armor 1 14
+```
+
+* * *
+
+Of course, there are many other ways to generate a strong password. For example, you can add the following bash shell function to your `~/.bashrc` file:
+
+```
+genpasswd() { 
+    strings /dev/urandom | grep -o '[[:alnum:]]' | head -n 14 | tr -d '\n'; echo
+}
+```
+
+and when you need to generate a strong random password just type `genpasswd`
+
+
+
+--------------------------------------------------------------------------------
+
+via: https://www.rosehosting.com/blog/generate-password-linux-command-line/
+
+作者：[RoseHosting][a]
+
+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]:www.rosehosting.com