SHELL

pipeline command in linux

Pipe is used to combine two or more commands, and in this, 
the output of one command acts as input to another command

example:
 grep command has searched the file ‘sample’, for the string ‘Apple’
 cat sample | grep Apple

bash pipeline commands

ls -lt | head	#Displays the 10 newest files in the current directory.
du | sort -nr	#Displays a list of directories and how much space they consume, sorted from the largest to the smallest.
find . -type f -print | wc -l	#Displays the total number of files in the current working directory and all of its subdirectories.

pipeline in shell

[time [-p]] [!] command1 [ | or |& command2 ] …