Learning Linux Shell Scripting - Second Edition

The here operator with the wc command

Let's write a script for using the wc command along with the here document:

1. Create a Shell script, here_03.sh:

#!/bin/bash 
wc -w << EOF 
There was major earthquake 
On April 25, 2015 
in Nepal. 
There was huge loss of human life in this tragic event. 
EOF 

2. Save the file, give the permission to execute, and run the script as follows:

    $ chmod u+x here_03.sh
    $ ./here_03.sh
  

3. The output is here:

    21
  

In this script, we have used the here document as an input for the wc command to calculate the number of words:

    Tape backup using << here operator
  

Let's write a script for taking the tape backup by using the tar command and the here document:

1. Let's write the script here_04.sh:

#!/bin/bash # We have used ...