hello my name is Jason Johnson and thank you for watching my videos I hope you
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this video is going to cover netacad the cisco netacad IP essentials chapter 10
part 2 of 2 and this video is going to focus on Linux and the OS 10 operating
system so let's take a look at these two sections here and then we're going to do
a chapter summary so we're going to take a look at Linux in the OS operating
system then we'll finish up with the basic troubleshooting process for mobile
Linux and OS 10 and operate our OS 10 operating systems and then we'll do a
chapter summary so with the Linux operating system I'm not going to go
into the history in the background of Linux and the operating system and
Lana's traval them and all of the creation of the open source software in
the open source community I would recommend that you check out the
description below I've got some links there that will give you some history on
Linux and also check out the netacad course and it's going to have some more
information on on this for you for linux so with linux we're going to look at an
introduction to the operating systems now linux and the OS 10 what are called
cousins of each other or they're they're related to each other and the fact that
they both come from the UNIX UNIX operating system or the original UNIX
operating system so both linux and os are UNIX derivatives or they inherited
their traits or they came from the UNIX operating system so both OSS keep most
of the UNIX basic traits structure traits in other words they don't have
things like Windows as where you don't have Drive letters like C and D and
things like that they are based on folders type of type of structure modern
versions of Ubuntu Linux include unity modern versions of a10 include a aqua
unity and a core gooeys or similar UI elements there are multiple different
gooeys or graphical user interfaces that you can get with Linux there's a couple
of main ones and then voodoo has unity but they are hundreds of different
gooeys that you can get and put on there you can get Linux and you can create
your own GUI with the open operating system if you want to get into some
programming and change the GUI around on yourself with the OS 10 though it's
locked into what they call the aqua GUI and it's but they do have some similar
elements to them now when we look at the overview of Linux and OS or OS X I'm
just gonna say oxo x10 here I guess a good way to say it but due to the
relation to Unix both Linux and OS 10 have similar command-line interface
coming our CL is the text-based tools they have a shell the file permissions
and case sensitivity or a few common characteristics Linux and our OS 10 is
case sensitive we're in Oh in the windows side it's not and they inherited
that from the Unix now when we look over at the backup and
recovery on these on the back of our recovery it does allow the user to
restore recover the data in case of a failure the deja doop is an easy and
efficient tool for backing up data in linux there's his mother open source
backup tools out there as well OS 10 users can use time machine it's a user
friendly efficient backup tool and there they are very similar to each other
because again they're based on a similar UNIX operating system which is now you
know either Linux 0 is 10 now the overview of disk utilities modern
operating systems do include disk tools to help troubleshoot and solve solve
disk related problems just like with Windows both Linux and OS 10 have those
as well a lot of disk problems are the same
regardless of the OS so whether it's Windows whether it's Linux or OS 10 some
of the disk problems are going to be similar so those tools are going to be
similar that fix those a good dis tool that should be provided or should be let
me restate that a good disk tool should be able to provide partition management
mounting and unmounting of disk partitions formatting bad sector checks
and smart queries and disk and district utilities or disk tools included in both
Linux and OS 10 so to install and boot more than one OS
though a boot manager is required grub is on the linux side grab is allow you
to boot multiple operating systems either multiple Linux systems or a Linux
and a Windows system and then boot camp is a popular boot manager for Linux and
OS as well now when we look at a scheduling task in the system's here
maintenance tasks should be scheduled and performed frequently computer
systems can be programmed to perform tasks automatically such as backups and
dis checks those are some good examples of a frequent tasks the cron service on
Linux can be used to schedule tasks in Linux and OS 10 and then with security
measures can and should be taken to prevent malicious software from getting
into a mobile computer system or into the Linux or the OS 10 as well now there
is a misconception about OS 10 and Linux that viruses do not get in those
operating systems that that they're safe quote unquote safe because they don't
get viruses all as often the the salt on that and this is my personal opinion is
that those operating systems do not have as many viruses on them is because they
are not used as much the Windows platform has by far the most users in in
in the IT operating area and so the people that are writing the viruses are
going to go for the low-hanging fruit and they're going to write viruses for
platforms that have 70 to 75% of the market and not that 20% because they
don't reap the same rewards from a smaller market and that's why Windows
has many more viruses that are out there now there can also be some arguments
about safety and some things like that first you know Linux in OS 10 versus
Windows I'm not going to get into that because I don't really take sides I
teach all the operating systems equally and so you can look at look at different
aspects of that about you know which ones are which ones are more safe or
which ones are more secure what I'm going to tell you is you're never truly
safe and secure with your operating system so you need to take measures to
secure yourself so those include make sure your OS is always updated make
sure that your firmware has the latest updates make sure that you're running
antivirus and anti-malware and you can run those both on the linux and the OS
10 as well I'm not going to go into the video on here on which software because
that information gets dated but you can check depending upon your operating
system which one to run on there and versus the windows now when we look at a
file and folder commands those are similar between the two operating
systems a number of command line tools are included in the unix-like systems by
default some common ones are LS like list CD change directory CP for copy and
beef remove you've got the grep command some administrative commands that you
have its UNIX and the derivatives utilize file permissions to create
boundaries within the system and that's one of the more secure ways that Linux
and OS 10 operates is that it's based on file permissions now every file on UNIX
carries its own file permissions so UNIX file permissions can be read write or
execute or a combination of those so a user can have access to those so you
would have flags on those like read/write X you know the user would
have these boundaries here and they would be given flags up can the user
read this can it write to it or can it execute
that file if it has read it can just pull that file up and look at it the
user has write it can make changes to that or expore execute it can actually
execute that a program or execute some type of up file from there if the user
is inside of a group does the group have access to this and then there's other
out here now also keep in mind that if the user is within a group it's going to
inherit those permissions so if user is in group a and group a is given
permission for read then user one is going to inherit the rights from group a
and also have a read permission so users inherit rights from the groups just as a
side note there for you now let's take a look at basic
troubleshooting processes for mobile Linux and operating system OS 10
operating systems these are very similar to what we've been covering in the class
all along you want to identify the problem ask
open-ended questions you want to establish your theory of probable calls
I'm going to go through these rather quickly by the way because we keep going
over these each chapter and reinforcing these you want to make sure that you
establish your theory of probable cause test that theory to determine if that is
truly the cause then establish your plan of action resolve the problem implement
the solution verify that the system is fully functional and implement
preventative measures and then document document document document all your
findings on there okay so identifying common problems and
solutions with a with operating systems they computer problems can be attributed
to hardware software networks or a combination of any of those three so you
always want to use Occam's razor and you can look up Occam's razor on the
internet if you want to but Occam's razor is the simplest answer is going to
be should be the correct answer that's the way I kind of use Occam's razor and
this is in this instance the simplest answer is most likely going to be the
correct answer so many problems can be solved with a reboot that's true about
Windows Linux our OS 10 sometimes just rebooting refreshes
memory it refreshes the operating system and sometimes that just fixes a lot of
things when a mobile device does not respond to a reboot a reset may be
performed you may have to go into a factory reset in the case of mobile
devices it's really nice whether you have an Apple device or a Linux or an
Android device or a Windows device when you reset that device and then all of
your information can then just be reloaded back down based upon your
logins so you know like on an Android you just go back into the Google Play
Store and all your all your apps once you log in all your apps would you roll
back down to that device same thing with the with the iPhones so then when a
standard reset does not correct the problem a factory reset may need to be
performed and then when a reboot does not fix a PC then you have to go further
so just rebooting it's still having the same problem then you just keep going
farther but you always want to do the simple things first so that's just one
of the things when I did helpdesk my users when I would go to help them they
would their first response would be yes I've already rebooted because they knew
that was the question I was going to ask them have you rebooted yet because if
you haven't rebooted let's do that first so some configuration could be changed
software could have been updated and that's some of the simple questions that
you would ask you know what was loaded last did something update did what did
you open an email what websites did you go to things like that they know the
simple questions start investigating and figuring out what caused the problem and
what needs to be reinstalled or fixed okay so with chapter 10 parts 1 & 2 we
looked at mobile devices we covered mobile devices operating systems used on
mobile devices we also looked at a boot to Linux and Apple and I just want to
say that this chapter in no way covers even close to all of the information
that you can learn about Linux or the Apple operating system there is much
much more that you'll learn about those but this is just an overview for the A+
and for the Cisco netacad course we did learn about graphical user interfaces or
the GUI and some of the tools that are used we also learn about troubleshooting
the mobile operating systems Linux and the OS 10 now some things to remember
that are important from this chapter Android devices use apps to synchronize
data not automatically synchronized by Google iOS devices use iTunes to
synchronize data passcode locks can secure mobile devices and they can and
should be used remote backups can be performed to a mobile device data to the
cloud you should also turn on device tracking I just had an example this
weekend where I lost my I've got a galaxy tab to Android device and I lost
it I didn't know where it was and so I went onto the tracking tracked it and
was showing at my house and I had remembered that I had left at my car so
I went out of my car in the garage and sure enough it was down inside the seat
where I had left it two days earlier and and forgot about it and then couldn't
find a number where I left it and then but my tracking mine went on to up you
know the Google Website made was tracking it down and it said hey it just
connected today it showed me that was just on the network and it showed me it
which address it was at and I was able to find it quickly so you should also be
able to should and can or can and should set remote locks up and remote wipes
where you can if a device gets stolen or lost you can wipe that device a lot of
companies do force that down on an owner device and then you also want to look at
antivirus software it's often it is sometimes used on mobile devices to
prevent the for malicious programs to other devices
or computers I will tell you personally a few my opinion is if you watch your
device close enough you don't really necessarily need antivirus i but you
don't what you want to watch out what what apps you're putting on there what
websites you're going to so that you can be careful about those okay well that is
chapter 10 part 2 of 2 I hope you hope this video was helpful for you and thank
you for subscribing and I hope you have a great day