Shell Scripting Tutorial for Beginners 16 - using sleep and open terminal with WHILE Loops Video Lecture | Complete Linux Course: Become a Linux Professional - Software Development

hey guys welcome to the next video on
shell scripting tutorial for beginners
in the last video I've shown you how to
use the while loops in shell scripting
now in this video I want to continue
using the while loop and I'm going to
show you some more tricks which you can
use with value and the first trick is
using sleep with the loops right so as
you know this code I have written in the
last video and this prints the value 1
to 10 on terminal right now for some
reason I want to give some delay while
printing the value and this I can do
with sleep command so I can just write
sleep here and then whatever number I
will give you for example 1 it's going
to pause the execution of this loop for
this much amount of seconds and once
again executing this loop normally right
so the sleep command gives a pause or
for whatever seconds you want you can
write here so if you want to seconds you
can write to second or whatever seconds
right so let's run the script and let's
see what happens now so run the script
and you can see the numbers are printing
after interval of one second and once
the condition is met you can see it
comes out of the loop and we can see our
normal terminal right now if I don't
provide this increment the value of n
will always be one so for example I
remove this increment of n the value of
n will always remain one for example and
this loop will execute infinitely so
let's run the script and let's see what
happens now so you can see it's printing
1 1 1 1 and this condition is always
true so this script will run always
until you stop executing it right and
how to terminate this process
is running using this shell script you
can just press control-c to come off of
this script so ctrl C and I'm out of
this script okay
so if you want the continuous loop you
give a condition such that it's always
true right but always remember that you
know whatever is the logic of your code
if you do not provide this sleep this
loop will work infinitely and it will
run so fast that it may you know slow
your computer even sometimes right so
this is the first trick now the second
trick I want to show here is how we can
open some terminals so for example I
want to open three terminals so I will
just write instead of ten three here and
I want to open a terminal using my bash
script right so what I can do here is
depending upon the what kind of terminal
available on your operating system you
can open those terminal so on my open
two operating system I have X term for
example and genome terminal which is
this terminal this is the genome
terminal and X term is also available on
my system so let's use the genome
terminal command to open those terminal
first so I will just use genome -
terminal and just give this and single
after this right and let me clear the
terminal first of all and let me choose
run the script and you will see three
more terminals are open so there is the
first I will close this the second once
again close this and the third I will
close this right so using this genome
terminal command you can open the normal
tunnel like this and X term is available
also on my
Ubuntu operating system so instead of
genome I can just write X term and then
once again I will run the script and you
can see these terminals are open three
terminals right so I can close them once
again so these are the two traits I
wanted to show you in this video and in
the next video we will see how we can
read a file using while loop so stay
tuned and please recommend subscribe and
bye for now