title: Unable to install pgcrypto
body: <p>I'm new to postgres, I need to download and install pgcrypto extension. I ran below command but nothing happened:</p>
  
  <pre><code>    [root@localhost /]# yum install pgcrypto
     Loaded plugins: fastestmirror
  Loading mirror speeds from cached hostfile
   * base: mirror.nbrc.ac.in
  * extras: mirrors.nhanhoa.com
   * updates: mirror.nbrc.ac.in
  No package pgcrypto available.
  Error: Nothing to do
  </code></pre>
  
  <p>Then, I looked to several of commands on google and tried with below:</p>
  
  <pre><code>    [root@localhost ~]# gppkg -r pgcrypto
  -bash: gppkg: command not found
  </code></pre>
  
  <p>I'm using postgres 11.3 on centos. Please let me know appropriate command/link from where I can download/install pgcrypto. Any help will be appreciated.</p>
  
  <p>Thanks,</p>