Wow, what a achievement you have spent so much time on this course and now finally you have finished
it and now it's time to do a recap and we will go over the commands that we actually have learned in
this course.
Do you know how many commands so far we have learned in this course?
Take a guess.
Well, approximately, we have learned about 146, 250 commands.
So to be specific, because I will be adding a few commands later or I have added a few commands now
that are not part of it.
But anyway, approximately, we have to learn 150 commands.
That is awesome.
Guys, you should pat yourself on the back that you have done an amazing job.
So I'm going to cover in this lesson or in this recap all the commands that we have covered.
So let's go over my spreadsheet that I have an open and at the same time I have a window terminal open
to my Linux machine.
So go where one by one.
So the first command I have right here, every command you will see, they are all alphabetical sorted.
So they are starting from a all the way to Z.
So we'll go one by one.
So the first command that we have here is ileus.
What does an alias do?
Alias creates a shortcut or a short name for a long command.
So if you just type simply Ilya's and you will see all the aliases had already been created for you
to remove an alias, you could just to Unreligious.
Then we have ARC.
Arc is the command that tells you the system architecture with a 64 bit or 32 bit at command is used
to schedule ad hoc jobs, meaning there is a command called crosstab.
If you wanted to schedule a job repetitively or if you wanted to schedule a job just one time, you
just type add command and the complete syntax can be found by running man at @ and you will find all
the options with that.
Then we have OK or Camacho's the output of a file by field.
So if you do that as much as LTA on your home directory and let's say, let's say you want to list only
the first column, so then you do this myself, TR Orckit and you printed the dollar one and you hit
enter and you'll get only the first call.
Moving on then we have bash.
Bash is just a shell.
Just tells you what schell's you are running.
So if you do echo and do a shell you'll see our bash.
Our shell is Basche then we have a, b, c, D stands for a calculator.
If you want to do some computation, some calculation, you can just Hibiki and you get into a calculator
more than just simply type your calculation like two plus two and it'll give you the four.
And of course to get out of it you could just to control C to get out of that.
Then we have Khail Callies for Calendar Case.
Case is a script that provides the options that is used in a script and it gives you the option.
If you wanted to press A or B or C Kittitas option, that is to read a file, then we have to change
the directory, some of these commands that you already know by heart.
So I'm not going to go into detail.
Change age.
This command is used.
If you wanted to change the properties of a password when a password should expire or not.
We have learned that and I believe in Model three and change group to change the ownership of a file
on a directory, a group ownership.
So change mod is the change file permission change ownership is to change file ownership, meaning if
you are doing this myself, you'll see this is to change the first column.
You need to use change mod to change this, you need to use change group.
And to change this ownership, you need to use change.
Only then we have the next one is Chronicity, which is a newer program that is used for A.P. system
to be service.
Clear is used to clear your screen so you simply type clear Altruria.
The screen C and P is to compare files bite by bite command and Dashti help.
If you wanted to get a quick help on any command that you want, then CP is to copy files and directories.
Very simple commands create repoll.
This is a command that we learn and I believe in module eight when he actually when we add module seven
I believe sorry in when we wanted to create a local repository to download the packages, then we have
crosstab.
This is to schedule the jobs.
Whether you want to get a one time job, a regular job cut is to cut the characters or fields in an
output, so if you have this much healthier or cat or whatever you're doing, so if you want to cut
the first character, so you will do cut minus see one.
This will give you all the D in the in every line.
So you see, I'll give you all the D.
So this cut is of course you have practice that the rehab date as give you the time and date did convert
a copy of just like copy, but it is mostly used to do the backups.
Then we have def d.f. file system disk space.
Usually when you do have an option minus H, you'll get the space utilization of the entire file system.
Next one number 27 command def compare files line by line.
Digg is the DNS lookup utility.
Remember we did that in lesson in Module seven where we have to if you are to find out the IP address
of a hostname, we use Dagar and it's lookup.
Same thing, a DNS utility message.
It's a print kernel ring buffer.
If you wanted to see system messages, any hardware related messages, you just simply typed message.
But of course to run the message, you have to be approved.
So just be careful because if you run the message right here.
Oh, OK.
So sorry, you don't have to be rude.
You could just run.
There is another command that is DMZ code, which is the next command for this command.
Yes, you do have to run.
You do have to be rude.
So let's see.
See right here says permission denied.
So you have to be rude.
This one tells you about the system information to hide the information.
What is the CPU memory you have in your system?
Moving on, do is the command that is used to in a scripting language with conjunction for the for loop
or wire loop scribblings.
Then due is used for file space usage.
If you want to check a usage of a specific file, let's say I have this file in my home directory.
Let's say pictures.
If I wanted to know the space I do you mind as education, S.H. pictures and it tells me it is zero
byte.
So just like that you could pick any of the files.
Rendezvous Bassman S.H. followed by the file name or directory name to get a specific size information
echo.
It's just a display input on the screen.
It's nothing but whatever that you type like echo Emran so springing back Emran.
So it's just like as if you were standing in the middle of all the mountains and you echo your voice
in your voice comes back is just like that.
This is kind of a tool that our command that is mostly used in scripting and as you know, scripting,
we have Kawada Module six then we have else else.
There's also a scripting command works in conjunction with Falu.
It is used in us to create a script.
Then each tool tells you the information about the NEC.
If it is its speed, it's other properties of that Nic.
Then we have exit as exit is just to simply accept your terminal.
F DESC is to display disk information.
And of course you need to be rude to run this command of myself and says, permission die, be rude.
So let's see, we've become rude.
And now if you type F disk minus oh, you'll see all the disks that we have available in the system.
We cover that in modulate and then foreground bring a process in the foreground.
Fee is again used in a scripting language with conjunction with F fine is to find files and directories,
then firewall cmd command.
This is the command.
This is a command to enable firewall or configure firewall.
It's a command line.
If you want to use the GUI, then you will run firewall D actually configure which brings up the GUI
firewall.
Sorry there is no D here.
It's just file dash config.
So when you run that brings up a good way to configure firewall.
So quit out of it then.
We have for again for as used in the script language free.
It tells you how much memory you have used available ftp to transfer files from one system to another.
Grep.
We learned that as well.
I believe in module three to grab a specific key word from a file or a directory or attractive structure.
There is another command called Ekra, which is an enhanced version of Grupp, though, if you want
to learn that as well, do man on it.
You'll find that out.
A group ad is to create a new group juss new group, then group to lead, as you can see it, to delete
a group.
Then we have Ecover then sys administration module.
Gunzinger is to compress files zipper's to compress a file.
Both use the same way.
No, no different different tools hault.
If you want to shut down the system immediately without waiting on the process had if you wanted to
get a few top lines of files, if you don't specify an option with the head then it will give you the
first 10 lines by default.
History Commands tells you how many commands have been ran in your terminal.
Hostname tells you the hostname of the system.
Hostname is the utility or command you use to manage the hostname.
If you want to change your name, you could use hostname.
Sitel, this is a new command or new utility.
Introduce an RedHat seven or Santoya seven.
ID is just the printer user information.
If, as the scripting command works conjunction with the if config tells you your notebook information
if you run have config meeran that many times and you should know this command by heart if down.
If you want to bring down the netbook, the NEC lets if you want to bring this down you run F down,
followed by this Nick name right now as you see it's up right here and running f up again opposite off
down and it s you want to bring the system in different levels.
We talked about different levels from level zero through level six.
So there are seven levels.
What are those?
I believe you know that if you forget any of these, please go back and review those modules.
iOS that is about input output status, what is been coming into the system?
What is leaving the system?
Then we have IP that's in your command, which will be replacing the Conficker man does the same thing
as if config IP tables is an all the command, which is a few systems.
Still, has this comen been replaced by the new command firewalled ACMD or firewall dash config killers
to kill a process by process?
Idy last shows the listing of last logged and users less is the opposite of more.
And you guys know what more is, right?
If you wanted to read a file one page at a time on a screen and you use more, and if you wanted to
do the opposite of it, then you do less and then tell me what else is.
Well, let's create a link.
It's that simple.
Locata, if it works the same way as if you are trying to find a file, the only difference between
file and located is locate.
If you're creating a file right now and run locate to find out file, it won't work because there's
another utility update DB Command that runs every day which will tell the system, hey, this system,
there is a newer file that's been created.
So if you want to use locate command right away, run update DB Command, unless you don't tell me you
don't know this command.
OK, Elvie create is to create a logical volume covered in module eight display is to display the logical
volume mail and to send sendmail.
If you want to send mail from one system to another or from outside of the system.
Management commands many times very helpful command creating a directory.
You know that.
And then keep moving on to number seventy six make file system if you want to create an example Firestones
system if you will.
If you adding a new disk to the system then you will create a file system.
This is coming module eight make swap swap as something that is taken out from your hard disk and once
you dedicate some space from your hard disk for you swap, then you will run the command and swap again
its part in Module eight mod probe program to add and remove modules.
We covered this command, if you forgot about it.
We covered this when we are doing a neck bonding.
And Nick bonding is a lesson that is covered in module in module seven.
Yes, more we just talked about more mount is used.
If you want to mount a file system, use this command module.
Eight move is to move files around from one system to another.
We covered that in the earlier modules, movies also.
Is to rename Ovalle, right?
Yes, Netz, that is telling you about the network statistics, you could use many different options
and a lot of system administrators, Usenet's that to troubleshoot many issues.
See tells you what's coming in, what's leaving about only the network status related things.
I usually run this commando's and that said, RMV to check the system, gateway, the IP address and
stuff like that to nice nice is to prioritize the process.
I think it's the part of the system.
Administration of Module five.
Check if it's not modified and probably your margins.
Five I think.
Yes.
This if you want to run a process and you want to prioritize with different levels to go on.
Nice.
No hub is the command to what interruption upon exit.
What does it mean that if I'm running a command right now and I close this window, it will also close
my program.
So, you know, up with it.
We cover that, of course.
And let's look up just like Digg.
Then we have A.P..
Q It's an A.P. utility, just like Chronixx.
It tells you which system and what A.P. clock that we are thinking to.
So if you run into Q it brings you to a. p q mode and then you run.
Piers.
Oh, it's his connection of yours.
I know why.
Because we remember we stopped A.P. and we ran across the clonidine.
So then usually that's where we cannot get the connection anyway.
If you are under all the system, you will see the A.P. Q utility there.
If not, then run C, then we have password to change the password.
Very beginning lessons, paying beginning lessons or seventh lesson, seventh module pipe if you want
to pipe is mostly used to change the output of a command.
So if you do ls minus L and you want to view the second column that you pipe it to another command,
which is let's say OK and print.
Let's say second column and I'll give you the second column.
Yes.
OK, so I'll give you the second column.
Actually I wanted to get the third column then I'll give you the third column anyway.
The pipe actually translated or changes the output.
So it actually deals not with the command, it deals with the output.
OK, moving on, Peko kills the process by a process name.
If you have a process running X, Y, Z, you just type kill X, Y, Z, it will kill the process.
You don't need to know the process.
I'd recommend very powerful command when it comes to sys administration when you're on a different options,
let's say minus F and then we do more because it's going to throw so much processes on the screen.
This one tells you all the processes that are running in our system.
Peevey Create LVM Command is to create a physical volume displays to display the physical volume.
PVS works pretty much the same.
P.W. D is working directory and that is something you don't know, right?
Oh, come on, don't tell me you don't know.
You do know.
OK, read is OK and you come in and you used in conjunction with the scripting language which reads
and waits for the input from a user.
We cover that in Module six reboot.
As you could see, reboot is just as namesakes, reboot the system, remove most files and directory
remove directory.
Just remove the directory.
Now why do we have our mediaa why can't we just use R.M. space minus R to remove a directory?
Well, seriously, I don't know.
Well they wanted to have a separate dedicated command to remove directorate.
Well that's fine.
Moving on, R.P.M. R.P.M. is about package management.
We use the command to install a package in our system.
Our sync, our sync is something to synchronize your packages or your system from one server to another.
ACP is again doing the same thing.
Copy files from one system to another.
Script script is something.
If you were running script and then you want to record all your commands that you're going to run,
then you type script C status is above C Linnik status.
So if you type AC status, you will see Linux is enabled, you talked about AC Linux as well, of course,
as H is the Shell, just like Basche or Quanzhou shut down.
You know, that sort of one of the beginning commands to sort your output in alphabetical order or reverse
order.
S.O.S report that as part of system administration module five, that is something that was added late
after the entire course.
So if you have not covered this lesson, please go back modifier cover this lesson as well.
Split spelling files into different files by size or lines.
SSA is just a protocol that is used to connect from one machine to another stat as a command that will
tells you the attributes of properties of a file of directories mostly used for C Linux.
If you want to switch user from one user to another, what do you do?
You do?
S use base dash.
If you do not specify a user, then it will change it to root.
Yes, Suzu allows you to run command as root swanbourne sort of.
Once you create Asla, it works the same way as it was that we have Meixell.
I remember.
But once you make a swap then you do swap on and sort of to enable or disable system.
Ctrl is a new command to enable start stop the services if you want to start, let's say, a party service.
Remember, we covered that in Module seven.
If you wanted to stop the service, you do system ctrl stop, followed by the name of the service and
all the words, and you would do systems service, the name of the service and stop or start restart
till till gives you the last few lines of an output, usually by default gives ten.
Tor is to put everything, all the files into one container so that becomes a top file.
TCP Dumouchel every in and out traffic of a system.
So if you do if config and you do TCAP dump minus I.
S for interface and P zero as three and hit enter, you're going to see every package that is leaving
your system and every transaction that's coming into the system is going to throw so many messages on
my screen so I'm not going to run it.
Moving on talent as works just like S.H. but it is not secured just like SSL.
So a lot of companies don't use that anymore.
Then is the command that you use in conjunction with the for a while loop in a scripting top?
Top is one of the favorite commands of system administrators.
A check system resources touch touch is to create a new empty file.
Unmount, a huge amount is to unmount a file system.
It is the opposite amount.
You name tells you about your system and you run, you name it tells you that it's a Linux.
But when you type your name minus a, which is for all that, it would give you all the information
about your system, like the kernel version or when it was created and so on.
Unique, it removes all the duplicates from an output.
One of the initial lessons that we covered uptime shows system uptime and load information.
User add create a new user user deleted so deleted the right user mode.
The Mod, as it says, is just to modify a user properties or attributes.
When you run just users, it will actually print all the user names of user currently logged in e.g.
create or B.G. display.
Both commands are for LV.
LVM is to create a new group and new volume and to display the volume from V.I..
You really need to know that is the editor.
When you run by followed by the filename, it will create a new file and will put you into editing mode
w show who is logged on and what they are doing.
So and you do clear and do just w you'll see it tells you there are two user logged in with the terminal
and how much CPU they're using and what time they're logged and what they are doing w get is the network.
So Wall Wall is to send a message to everyone's terminal.
If you wanted to send hi or if you wanted to send hey I'm bringing down the system your type wall hit.
And then you send a message and then you do control the actual broadcast message to everyone who is
logged into the system, account, words, characters, lines and so on, you get network download a
program.
So if you have a complete you are well, you could just get followed by the URL and I will download
the package.
What is the full description of A commands?
If you want to know something about command without going through the man pages and you just type what
is followed by the command name, which, which will show the full path of actual command.
So let's say if you are doing which wall, so it tells you that this wall command is located in slash
bin slash wall while against the scripting command works in conjunction with Doodlebug Wilder, who
shows who is logged on just like W but the difference between W and who is that, who does not show
all that information after logging Idol, CPU, PXP, you and what.
Who am I.
Hmm.
Remember that command.
You better write it.
So am I.
Tells you your user name right is to send a message to a specific user, Zephyrs underscore grothus
that is also used when we were creating or extending file system.
So it's in module seven last command right here, but of course not the least as that's how everybody
sees is right.
Yum Yum is to download and install packages in your system.
So here is the summary of everything we have learned.
And if you remember, every single command that we just covered and of course covered an entire training
course, then you did an amazing job.
You know, everything in inside out.
And again, Kulluk.