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Questions tagged [administration]

Questions about Computer Administration

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Resources for learning about Ubuntu server administration [closed]

I'm looking for recommendations (either book or online course) for learning about Ubuntu server administration in the context of web application hosting. In particular, it should cover the following ...
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Does Ubuntu server 20.x have default firewall settings?

I am using Ubuntu server 20.04 on my server and today wanted to check what ports are open and found that neither iptables nor ufw are installed. Is there some other firewall installed by default on ...
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19 votes
4 answers
2k views

Seeking an "operator present" indication for a remote system accessed over ssh

An elderly relative uses a Ubuntu 18.04 + LXDE desktop, mostly just for internet browsing and to play a few word games. They rarely shut the PC down...last time I checked, it had been turned on for ...
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Mount point getting drop and getting back automatically

I have an SMB (v4.7.6-ubuntu) mount point which is used by 2 other machines in the same network (AWS). Sometimes that mount point is getting lost and again automatically coming back. Whenever it is ...
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1 answer
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Info regarding Disk/Drive partition in Ubuntu

I am just starting to use Ubuntu. I have already installed it in VM.I am general user and not tech expert. So my question is In windows generally there is one disk and then we partition them into ...
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How to stop users from accessing the backend source code running on server

I wanted to distribute the server side code (Node.js) to some of my users for hosting purpose, but at the same time I don't want any type of manipulation inside the code. So I have decided to use ...
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5 votes
1 answer
301 views

Logging off users with a countdown message

I want to do some maintenance on a server but in order to do that I need all users to be logged off. But I want to send I message (like shutdown do when you want to shutdown the system) to all the ...
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Error 5 - input/output error

I am trying to install Ubuntu (actually Kubuntu, but I've tried Ubuntu as well and it gives the same error) on my AMD Ryzen 5 3500u laptop, which runs windows perfectly. Every time I try to install ...
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5 votes
3 answers
2k views

How to configure policies/preferences for Chromium

I'm trying to enforce an URLAllowlist for my local Chromium (Version 89.0.4389.90, Snap) on Ubuntu 20.04.2 LTS. According to Google the policy should be available. The Chromium project discusses the ...
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2 votes
1 answer
159 views

Polkit Window doesn't allow user selection, how to pick different admin

I'm running the latest Ubuntu 20.04.1 It seems like polkit(I could be wrong here) isn't working as expected. When a regular, non-admin, user tries to do something that needs admin, they get a dialog ...
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2 votes
1 answer
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"An error occurred while extracting files." using Archive Manager

I get this error while extracting files with Archive Manager: An error occurred while extracting files I am using Ubuntu 20.04. How can I solve it?
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1 vote
1 answer
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Updating Ubuntu 20.04 Server

I am running Ubuntu Server 20.04 on my Emby server. And periodically, I log in via SSH to run "sudo apt update" and "sudo apt upgrade" to keep my OS patched. I also periodically ...
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  • 113
4 votes
2 answers
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mariadb-server : Depends: mariadb-server-10.3 (>= 1:10.3.25-0ubuntu0.20.04.1) but it is not going to be installed

Recognizing that this is basically a FAQ: nicholas@mordor:~$ nicholas@mordor:~$ sudo apt --fix-broken install Reading package lists... Done Building dependency tree Reading state information......
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1 answer
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/home/jdoe doesn't appear after creating user named "jdoe"

I'm running the last version of Ubunutu on VirtualBox. Just learning the usermod command. I got a problem : when i type sudo useradd -d /home/jdoe jdoe or sudo useradd -D /home/jdoe jdoe or even sudo ...
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1 answer
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Unattended/headless Ubuntu server with disk encryption - how to set it up?

I'm a long-time Linux user, but I'm not well-versed with the newer developments, esp. wrt Ubuntu and system(d) administration. I have a very old PC that I want to use for a file server, Mercurial repo,...
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How to generate a JSON report briefly summarizing system hardware?

The initial report sent to Ubuntu describing the system is no likely a summary pulled from lspci, lscpu and similar utilities. This is for bug reporting. Nonetheless, can I generate such a report, ...
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How to configure group settings for docker admin? [duplicate]

Listing docker containers: docker ps -a -q error: Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.40/...
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1 vote
1 answer
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User creation with limited access

How to create a user with access to selected applications installed in the system and read/write permission to only one directory in the file system? Say, for example, one wants to create a user dummy ...
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2 answers
170 views

Systemd interaction with Minecraft server

As you do when you're bored, you set up a Minecraft server for you and your friends. I'm trying to make this constructive so I'm learning systemd. My question is if there is a way to interact with ...
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1 answer
138 views

Why can't I see the sudoer permissions for another user in Ubuntu 18.04?

I am very used to using sudo -l -U <user> to check another user's sudo capabilities but since version 18.04 I can no longer see this. It always comes back blank. Is there some special setting I ...
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Cron job of new user high CPU usage

I have a fresh (3 weeks) install of Ubuntu server 18.04 LTS and about a week in I created 2 new users. If the cron systemd service is running, something is making my cpu really hurt, cause the load ...
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how to make environment variables persist?

For this bash script: #!/bin/sh export AccessToken=678 export AccessTokenSecret=wxy export ApiKey=abc export ApiSecret=123 How can I then ensure that printenv run at a later point in time will show ...
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2 votes
2 answers
3k views

how to use setenv to set an environment variable?

I've tried a few variations on setenv usage, including: thufir@dur:~/powershell/helloPSTwitterAPI$ thufir@dur:~/powershell/helloPSTwitterAPI$ setenv ApiKey="57647625454354365" Command 'setenv' not ...
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1 vote
0 answers
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Active Directory with ubuntu compputer

How I open Ubuntu device by a user from active directory after joining this device to the active directory ?
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2 votes
2 answers
1k views

Is there a way to create a user with username "admin"?

Is there a way to create a user with username admin? When I tried to pick a username admin I got this error/ warning message. The username you entered (admin) is reserved for use by the system. ...
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1 vote
1 answer
2k views

How to open Nautilus as admin in Ubuntu 19.04

We have been cautioned not to use sudo nautilus to open Nautilus as root. Have not been able to download gksu for 19.04. Have also tried to install nautilus-admin to 19.04 without success. Is it ...
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1 answer
717 views

Proper way to run Rider without Missing Templates

I'm using Ubuntu x64 18.04 and Jetbrains Rider IDE 2019.1.3 If i download rider with snap or download & extract tar.gz file; I can run rider with clicking app icon on Ubuntu's launcher / unity. ...
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-1 votes
2 answers
144 views

Is it possible to update, upgrade and administer Ubuntu via the GUI and never touch a command line?

Hi I use Debian and Fedora and have since 2007. It seems that Ubuntu has marketed and built itself to make Linux easier and more user friendly for daily use. PROBLEM: I am planning to use Linux in ...
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0 answers
1k views

New restart error? “Authentication is required for rebooting the system while an application is asked to inhibit it.”

Okay, so this is a follow up question to my last one, about my “issue” installing VirtualBox off the Software Center. I did what I was asked to with the Software Center, as it looks like VirtualBox ...
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24 votes
2 answers
21k views

How can one restrict the number of CPU cores each user can use?

We have a computer whose CPU has 32 cores and it's going to be used for running programs by a few different users. Is there any way to restrict the number of cores each user can use at any time so ...
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2 votes
1 answer
1k views

What is the best cgmanager alternative for Ubuntu 18.04 LTS?

I was using package cgmanager to automatically manage processes into memory cgroups in Ubuntu 16.04 LTS environment. However, I did a fresh install of Ubuntu 18.04 and package cgmanager is no longer ...
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3 votes
2 answers
11k views

Ubuntu 18.04 ethernet not configuring automatically

I have a laptop with Ubuntu 18.04 Desktop installed. The system is eager to configure and operate WiFi, but I need a wired connection because my adapter is slow compared to the 1000BASE-T Ethernet. ...
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3 votes
2 answers
17k views

How do I change the boot partition from one drives partition to a different drives partition?

I have two hard drives each with one primary partition, each with their own Ubuntu 18.04 install sda1 40gb sdb1 512gb The only purpose of sdb1 is to hold compressed backups of sda1 Normally the ...
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  • 153
1 vote
1 answer
256 views

Install minimal Ubuntu like AWS EC2

Is there any way I can install a minimal version of Ubuntu (GUI-less) so that it would closely resemble the Ubuntu set up you get when you get a standard AWS EC2 system? is there a better choice that ...
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2 votes
1 answer
1k views

How do I check that my users and groups are correct?

I have many Ubuntu-powered devices around me. As far I know /etc/group, /etc/passwd, /etc/shadow are created during installation, so they do not belong to any package: $ dpkg -S /etc/passwd dpkg-...
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0 votes
1 answer
540 views

Cannot sign in my laptop after sudo admin problem in terminal

Whenever I open the terminal I'm Ubuntu 18.04 To run a command as administrator (user "root"), use "sudo <command>". See "man sudo_root" for details. After that, I can't get into any of my ...
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1 vote
0 answers
1k views

change permission of directory and all its sub-directories/files recursively

I have search around but can't find the correct answer. How do I change the permission of a directory and all its sub-directories/files then also when a user creates a file or directory this must ...
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1 vote
0 answers
101 views

Prevent AD users changing the background in Ubuntu 16.04 with Unity desktop [duplicate]

I run a high school computer science lab with 17 desktops running Ubuntu 16.04 with the standard Unity desktop rather than Gnome. The users log in with Windows Active directory IDs and have standard ...
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19 votes
7 answers
22k views

Is there a GUI tool for managing systemd on Ubuntu 18.04 (Bionic Beaver)?

Is there a GUI tool for managing systemd on Ubuntu 18.04 (Bionic Beaver)? I want to be able so see the status of services and/or units (and/or whatever else systemd calls them). Ideally, I could ...
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0 votes
0 answers
38 views

Ubuntu 16.04 and Chrome managment

First of all, I'd like to greet everyone, it's my first post on this forum. I got two questions about Chrome browser in Ubuntu 16.04 (Xenial Xerus). I need to find out how to manage it from Terminal ...
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0 votes
1 answer
775 views

share virtualbox os with multiple ubuntu users

i have an ubuntu install with user account of myself and my brother sister father. recently install windowsxp on virtualbox on myside. how can i let my other users (brother sister etc ) to have access ...
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0 votes
0 answers
27 views

Share one of the main linux directories on server for all network clients

I'm trying to setup a network that I share /usr folder on my server and use it for all my clients so I don't need to update my /usr/lib for all clients every time and just updating server for all the ...
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1 vote
1 answer
144 views

leafnode fetchnews: received bogus greeting (498)

How do I run some sort of diagnostic to check the connection to an upstream leafnode NNTP server running on the same network? thufir@arrakis:~$ thufir@arrakis:~$ telnet 192.168.1.7 119 Trying 192....
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1 vote
2 answers
1k views

How to centrally administer Ubuntu servers [duplicate]

I'm curious as to whether there is a convenient way to push updates to multiple Ubuntu servers from a central location instead of remoting into each one individually and manually updating them. Bonus ...
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0 votes
1 answer
209 views

System Adminstration

I have lots of instructions for various things that tell me to choose the Administration function from my System menu. It doesn't exist. What should I do?
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1 vote
0 answers
135 views

How to prevent cached temporary files from being removed?

I have Ubuntu14.4 on my machine, and also have downloaded Android-SDK to program for Android. When I install some package in Android-SDK, it does three things: first it downloads the package into a ...
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4 votes
3 answers
10k views

How should one name "admin" user?

The ubuntu has user "root" of unlimited privileges, apparently, it exists to not be used. The "admin" is already taken by something. So, assuming the computer is not connected into any sort of ...
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0 votes
1 answer
1k views

How to change shutdown/Suspend/ off the main panel in Ubuntu MATE 16.04

I want to log off and then shut-down my computer and those buttons are deprecated for me, I would like to change that Power button for log-out instead and the menu items too. How can I achieve this ?,...
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  • 1,870
0 votes
1 answer
50 views

How to create an admin account after my admin account got deleted

My admin account has been deleted. This was because I had to use the dell recovery after a problem after one of the updates provided by Ubuntu. Now I only have the guest account. How do I go ...
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7 votes
1 answer
7k views

How to uninstall all trackers (tracker-miner: fs, apps)

How can I uninstall this programs in Ubuntu 16.04? Permanently from being installed by updates.
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