title: How to uppercase first letter of the first word in each sentence using shell script?
body: <p>I am new to shell scripting and I am trying to capitalize each first letter of the first word in each sentence from a txt file called input.txt and I want this input file to be a argument of the shell script</p>
  
  <pre><code> ./script.sh input.txt
  </code></pre>
  
  <p>sample input file:</p>
  
  <pre><code>i am Andrew. you are Jhon. here we are, forever.
  </code></pre>
  
  <p>result file:</p>
  
  <pre><code>I am Andrew. You are Jhon. Here we are, forever.
  </code></pre>
  
  <p>Cheers</p>