Linux Sysadmin Basics -- User Account Management

[@yashlakha4497]

this guy really understands the concept of open source.......#knowledge is free #knowledge is for everyone

[@ClaringtonMusic]

Wow it’s 2020 and this is the greatest video I’ve ever seen. I mean the greatest!

[@DarkXagami]

WoW! We're back on track! I found myself typing along with you and going off and venturing on my own. I was adding users, changing their rights, and deleting them like I was in some sort of auto-pilot mode. The best way to explain it is like I was on my desktop and just navigating through folders with my mouse, except, I wasn't using a mouse. I was using Linux commands!!! Almost felt like second nature!!! Thanks man!!!

[@jokesNgiggles]

this was in fact the greatest video I have ever seen.

[@HuyVu-vi4ut]

How?

[@jokesNgiggles]

@@HuyVu-vi4ut how could it not be

[@tutoriaLinux]

It answers the big questions and mysteries of life, makes you laugh, makes you cry -- 10 years after I made it, I can honestly say it's my greatest work. It really does have everything.

[@Fernandez218]

@@tutoriaLinux which part is the crying part?

[@dannycalise8519]

Watching your series now.. Appreciate the work you put into these.

[@FadaOfLegends]

Right on time! Just finished my class modules and this helped tie everything together! Appreciate you Sir!

[@valkyritza]

Thanks! ❤

[@edwardmcduffey3857]

Thanks for putting in the time to create this lectures and sharing with us Systems Administrators.

[@edenverjolas1866]

Being paranoid is the best in our day and age, good job sir.

[@headcase2226]

A gentleman and a scholar I say.

[@TheMagickwizard]

Very impressive video. I've worked for companies on and off for many years who add employees and I have always been curious on how it works out. You're only reference to it corresponding to a company type situation is where you mention you delete the user when the employee quits surprised me. This has been going on for tutorial after tutorial where no reference is made to real scenario so the entire vision of what you are doing is lost to those who would learn quicker by scenario. I have faced this same dilemma where I when I teach a mathematical equation to understand it properly I show what it is actually used for in the the field. This results in a concentrated thought form where the theory of the equation is balanced by the pragmatic use of it. First comes the lecture on the equation and then the explanation of the equation. For example, I might give lecture to students on the equations of deceleration and acceleration. The general theory is to explain that you cannot go any faster in space than you have fuel to slow down. I then begin the standard equations to show fuel consumption where the craft is delegated a speed where it can return to base without compromise. Now, your video is very well done and I admit I did not know that you could delegate to a new employee a default shell. This is something that I found valuable and will be using from now on. Again, I give you my sincere compliments. I enjoyed this video very much. As I stated in a previous message to you I enjoy getting all the software in Debian. I think in terms of downloading free what would cost me thousands of dollars.

[@TheGruselmops]

You make the best linux tutorials i know. Want to see more console windows ;)

[@Mo-ol2lr]

You are awesome!!! Love the way you explain things. And now I shall continue binge watching the rest of this course >

[@sharon2416]

This helped me so much in my self-taught journey

[@TechZoneUK]

Your videos are awesome! Please make more. Keep up the great work!

[@tutoriaLinux]

Thanks! Comments like yours motivate me to make more :-)

[@cr6925]

Thanks so much for takng the time to put these tutorials together. They're really helping me to get to grips with Linux! :-)

[@tutoriaLinux]

Thanks, that's great to hear! Getting to grips with Linux can look overwhelming at first, but it's not so bad, and the payoff is enormous. Keep kicking ass!

[@nathanhargreaves7071]

schnerg was the best possible example name. It cracked me up every time I heard it.

[@thcsparky]

agreed

[@Coding-yx1pf]

Thanks, Really great stuff. Very useful. To the point and no bullshit. You know a lot. must've spent a great deal of time behind your desk. Looking forward to working through your work. Not easy to find things that actually work and are there to teach. Thanks

[@marcinzpola]

Great tutorial, thanks ;) Greetings from PL

[@PunmasterSTP]

U, ser, are an expert teacher!

[@edgarardon3154]

thank you! this is very useful practice for my linux essentials cert this saturday!

[@dujajohnson7904]

Finally learned how to run terminal in root mode. Getting prompted for password every time was annoying! Thanks

[@josedejesussanchezverdin7225]

Thank you very much for the video and taking the time to pass your knowledge! Greetings

[@andreymatsoha7007]

adduser -- add a user or group to the system useradd -- create a new user or update default new user information usermod -- modify a user account deluser -- remove a user or group from the system userdel -- delete a user account and related files

[@boubeniamohamed236]

Hi TutorialLinux, Thanks for your incredible work. Please, I would like to know if we must disable or delete the other services accounts listed in /etc/passwd (which are considered as open doors) ? Thanks !

[@hengdam87]

all your videos is really helpful. thank for your hard work.

[@hudsond15]

Absolutely top notch video. Thank you.

[@mathssoso4261]

please, what dis you do at 14:25?

[@francissicnarf4707]

Key combination CONTROL + R will search previous commands you typed in on your shell

[@beautifulrelaxation3105]

Wow, this is amazing!!Thank you

[@gotli20]

Hi I m using Rhel7 and using following command useradd -d /tmp/dominos dominos but it is giving useradd: cannot set SELinux context for home directory /tmp/dominos. can you plz help me out how to troubleshoot it?

[@ky5069]

Any reason why a black box sometimes appears? Is it related with security?

[@Seattlefan77]

whats the significance of tailing those three files? which one shows what? shadow shows exclamation marks but passwd doesnt? Then whats the point of checking out etc/group?

[@networksystemguy9120]

How can i delete the Home directory while deleting the use using #userdel ? , is there any way or i've to do manually ?

[@BVKFocus]

How can I restrict users to access only few things especially for mca students

[@ANVary]

I want to know the date that i created my user account. how can i check it?

[@wolfganggermain7175]

how do I get that bottom bar you have that gives additional stats?

[@Dj_sanwich]

Deff the best vid i ever seen

[@monday6740]

Nice example - One thing I find confusing in the example: most users seem to have a group named exactly as the user itself. It can be confusing in my mind, if you really need an own group (as opposed to joining an existing group), I would create group _groupX. If a user has a group with the same name, and nobody else joins that group, it's the perfect example of a totally useless group

[@tahaait7236]

Generally, when you create a new user you can assign the group on which he should belong, no matter what the group is. There are no useless groups. You can create a user with the same name as its group and decide after to add users to that group according to your needs. Generally groups are like profiles that have some roles and responsibilities within the system.

[@avinashh21]

Hey, great videos, thank you. I run fedora 25 and I have vboxadd:!!:17142:::::: in my /etc/shadow. What does two exclamation mark signify? Thank you in advance.

[@tutoriaLinux]

It means that password login is disabled for this user, meaning that the user can't get a login session. These are service accounts, so processes can be started as this user, but they can never get a shell (which is a security risk).

[@jackfrost383]

Do you have updated vids? As 'Man useradd' shows there is now an updated command which is 'adduser'?

[@tutoriaLinux]

These aren't out of date -- those basics aren't changing anytime soon! The reason I cover 'useradd' is that you can expect to find it on pretty much every Linux server you ever log into. "adduser" is generally only available on Debian and Ubuntu systems. Although I'm using Ubuntu to demonstrate the course material, I've tried to make things as cross-distro-compatible as possible, just to make sure people have all the tools they need to administrate the wide variety of servers that they'll meet in real life. I hope that helps!

[@garretmkiii]

@5:10 ..."Get rid of some of these users before you push it online... use containerization... million open doors for bad guys to walk through" Ugh. I guess opening ports on my server BEFORE I finished your tutorials was an especially bad idea. Whoops. Close the blast doors! Close the blast doors! My already infected network, "open the blast doors! Open the blast doors!"

[@tutoriaLinux]

We all do it -- live and learn! :-D

[@jaredkeown]

type "exit" to logout of root (sudo -i) user. Perhaps there's another way but this is all I could find that worked

[@jaredkeown]

just learned the su command switches users: su - [username]

[@DarkWhisperer13]

if root want to give access file to a user. How do I do that?

[@ajopasoij9d00]

use the chgrp for that specific file.

[@bridgeItoC]

Your video is awesome! Thanks. Btw when I try to create a user It throws me a man page....and user is not added. Any ideas why?

[@tutoriaLinux]

akiko turhan When you see the man page (or more likely the output of --usage), 99.9% of the time it means your syntax was wrong. Did you ever figure this out? If not, just paste the command you're using here and I'm sure someone will help you out.

[@RandomAlexus]

God this tutorial is so good.

[@brooksburris8341]

I really love these videos! I'm having trouble with the add user command though it doesn't work exactly like it does on yours. It keeps giving me a message back that I don't understand even though I typed it exactly like it was on your computer. I was even in the same pwd as you.

[@brooksburris8341]

Now when I'm trying to delete a user, it says user does not exist. I can see it under home and I am typing it exactly as it appears /home/schnerg I have no idea what I'm doing wrong.

[@siniteanrazvan3298]

im lost at 6:53

[@stephendiebel3057]

Failed to open a session for the virtual machine box. AMD-V is disabled in the BIOS (or by the host OS) (VERR_SVM_DISABLED). Result Code: E_FAIL (0x80004005) Component: ConsoleWrap Interface: IConsole {872da645-4a9b-1727-bee2-5585105b9eed} msg received form Virtual Mach. Oracle screens are not like yours

[@tutoriaLinux]

Google is a better place for finding a solution, but it sounds like your BIOS has the virtualization setting turned "off" -- you'll want to reboot the machine, jump into the BIOS settings, and turn on AMD-V (hardware virtualization).

[@HotDogWater289]

How do I reset my sudo password on Linux? I'm trying to teach myself Linux with your videos hoping to learn and land an IT or cybersecurity job.

[@tutoriaLinux]

If you're already logged in as root, just run 'passwd.' If you're sudoing from a user who is in the sudoers file, then just do the same (change the password for that user). If you're locked out and have physical access to the machine, mount the hard drive and replace the password hash in /etc/shadow for the user you want to reset the password for.

[@HotDogWater289]

@@tutoriaLinux got it I figured it out all alone! Thanks for the reply and I'm still watching and learning from your videos!

[@monday6740]

It's funny that /etc/passwd ( the password file ) stores .... well, no passwords. I guess that on a sunny afternoon in 1973, it did store passwords literally in there

[@tutoriaLinux]

Yeah, it's a legacy thing. There really used to be plaintext passwords in there, and then crypto happened in the 80s and passwords got moved to /etc/shadow.

[@Postulatedstate]

can you explain to use what hte default usernames on linux are because i get a huge list of users and im like wtf? how do i know some of these are not hackers adding user accounts on my system. thanks !

[@tutoriaLinux]

Yes, they're most likely service accounts that your distribution creates for software that comes pre-installed. You can google them individually, along with your distro name, to see what they are. Digging into mysterious parts of your system is a GREAT way to learn. Have fun!

[@Chris-cl5gg]

Elon... Is that you? Damn you sound a lot like him though haha.

[@mattb5639]

This was really helpful.

[@Pippymint]

I can hear your server room in the background ;).

[@chaitanyasurepally8249]

very nice video. thank you so much.

[@pipotzescu]

awesome tutorial

[@nicksabino07]

Sir your tutorial is great godbless you :)

[@unboxing-rish]

u are awesome ! great tutorial

[@EX141FE]

Awesome videos!

[@Maxt3r1]

Very good video :)

[@ill-fatedstranger447]

Good tutorial but sound quality is not good

[@MyTube4Utoo]

Good stuff!

[@Ryuudo123]

im missing the need for all this. Sure we know how to check if a user has a password, and if he doesn't then he cant login...but whats Shadow?whats the difference between that and the passwd folder? whats the etc folder? why would we want to use the shell to add a user? isn't there an easier way? (or that question implies I should stick to Windows? :P)

[@jasonpittman6849]

Awesome!

[@joepoor5327]

ty

[@HigherPlanes]

awesome!

[@pynx5585]

you sounded like elon musk on this specific video. nice.

[@andreviniciusbezerradasilv9335]

thank u

[@kingaita9523]

How to switch between users? Use "su" command (man su) tayochu@goodlad:~$ sudo su Dave Dave@goodlad:/home/tayochu$ whoami Dave Dave@goodlad:/home/tayochu$ exit exit tayochu@goodlad:~$ whoami tayochu

[@pereloma]

Google+ me, that aged well :D

[@teoe9910]

99999 days are 390 years

[@jinooks9590]

sick

[@williamtang5686]

nice intro haha :)

[@cdoublejj]

sue-doo

[@cerenademe9433]

XD

[@MKSundaram]

How do I find the program and then uninstall it? I want to search for canon lbp 2900 B driver installed on my Ubuntu 22.04 and uninstall it completely and re-install the 32bit version as 64bit is not working. could you please help me? Thanks