In Linux, The pipe character, “|” is used by Linux Hosting professionals to concatenate two or more commands together. The output of the first command is “piped” into the next program, and if there is a second pipe, the output is sent to the third program, etc.
ls -la /usr/bin | less
The above command used by Linux hosting professionals gives a long listing of all of the files in /usr/bin. Due to long output we pipe the
output to a program called “less”, which displays the output for us one screen at a time.