title: Can we connect amazon redshift thro linux shellscript without password?
body: <p>Team, 
  I am using amazon redshift ( 8.0.2. ). While connect redshift cluster, we can connect without password ( this setting we can do in my local machine - pg_hba.conf entry ).But
  I have set "md5" to prompt password. </p>
  
  <pre><code># IPv4 local connections:
  host    all         all         127.0.0.1/32          md5
  # IPv6 local connections:
  host    all         all         ::1/128               md5
  #host    postgres   postgres    &lt;my_ip&gt;      md5
  </code></pre>
  
  <p>Now i would like to connect redshift thro linux server. in my shell script, I am connecting redshift and doing my activities. But I should be able to connect redhsift (i.e i shold be able to pass the password as variable, and after connect, i should be able to perform my activities ).</p>
  
  <p>Could you please guide me on this ? </p>
  
  <p>Thaks </p>