EMT 2390L – Lab 3

For each of the following commands write a description of what it does and provide a screenshot with an example of its usage:

• > 
• < 
• |
• grep
• head
• tail
• echo 
  Less Then
  The Less Then command is used as an input for a file or files.

  

  Greater Then
  The Greater Then command sign is used to as an output towards a file or files.

  

  Vertical Bar
  The vertical bar character is used to represent a pipe in commands in Linux operating systems. A pipe is a form of redirection that is used to send the output of one program to another program for further processing.

 Grep
Grep is a well made program that allows user to find text patterns within   files.In addition, when grep finds the pattern, it prints out the lines containing the part ten within it.

 Head
Head is a command that prints out the first 10 line of a file. For example, in
this image it shows the words or the sentence that was input into the file.

Tail
The command tail is use to print out the last 10 lines of a file. In fact, if a
user only needed 3 lines to be printed out they could use the command
tail -n 3 abc.txt to print the last 3 lines of a file.

Echo
The echo command is one of the most easy shell command because its
basically use to display a line of text. It’s use to help user write script
while working on the linux program.