Questions tagged [administration]
Questions about Computer Administration
211
questions
-1
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1
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17
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Swap to files not working
I have all my swap used (by Rust compiler) and it didn't grow despite I do have swapspace package installed.
total used free shared buff/cache available
Mem: ...
- 133
2
votes
1
answer
60
views
New to Linux development: any good resources describing the administration of the environment to run my program?
New to Ubuntu Desktop 22.04, and am wanting to run a .NET 6 program that I've created on Windows on the system. Some basic tests have shown the program works - in a way. I can run it via the dotnet ...
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-1
votes
1
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62
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I borrowed a Ubuntu administration book dating to 2013. Is it useless? [duplicate]
I guess the book can be partly good, and I am waiting for other Linux administration books from the library.
So, would I waste my time with that book? It talks about Ubuntu 12.04.
I'm pretty new to ...
0
votes
0
answers
37
views
master password for user login debugging ubuntu
I manage a small cluster. The users call me for problems in vnc or xrdp login. I want to be able to enter to their user direct from xrdp and see the issues.
I need a master password that i can enter ...
- 1
-1
votes
1
answer
66
views
Common admin commands?
I usually work with administrator access privileges on my Ubuntu workstations. On a new machine, I've recently been offered only a normal user account; and asked to provide a list of admin-level ...
- 412
1
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0
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3k
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How to remove Ubuntu Pro from a machine?
What is the process to stop using Ubuntu Pro and return the machine to what would have been it's general configuration before using Ubuntu Pro?
I've done "sudo pro detach" which said it ...
- 292
1
vote
0
answers
39
views
What could cause a "user not in passwd" error when using su, ssh connection refusal on a Ubuntu 20.04 Web Server?
Something happened on one of our server running Ubuntu 20.04 that caused a co-worker who was logged in via ssh at the time to get a "user not in passwd" error when they tried to use the su ...
0
votes
1
answer
11k
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Unable to locate package net-tools [duplicate]
I wanted to install dhcp server. When I typed ifconfig it says,command not found but can be installed with sudo apt install net-tools. Then I did so. Results were
Reading package lists... Done
...
2
votes
4
answers
33k
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How to fix the "Unit docker.service could not be found." error?
How do I simply pull and run hello-world?
nicholas@mordor:~$
nicholas@mordor:~$
nicholas@mordor:~$ snap list docker
Name Version Rev Tracking Publisher Notes
docker 20.10.14 1779 ...
- 1,158
1
vote
2
answers
1k
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Applying netplan with both NetworkManager and networkd
I have the following question: how does sudo netplan apply work when it has several configuration files with different renderers: e.g. I have 2 config files in /etc/netplan:
01-network-manager.yaml
# ...
- 13
0
votes
0
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34
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How do I, if at all, configure a user environment that is not tethered to a physical machine with a Ubuntu image installed
This is the genesis of
How do I copy a local home dir to an iscsi mounted home directory
I have read, over the last decade, that while Ubuntu is pretty respectable with upgrade in place it is not ...
- 111
0
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1
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151
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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 ...
- 111
0
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0
answers
840
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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 ...
- 702
19
votes
4
answers
2k
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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 ...
- 23.7k
0
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0
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60
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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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0
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1
answer
40
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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 ...
0
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1
answer
132
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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 ...
5
votes
1
answer
506
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 ...
- 53
0
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0
answers
4k
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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 ...
8
votes
3
answers
7k
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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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3
votes
1
answer
687
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 ...
- 33
4
votes
1
answer
23k
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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
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1
answer
187
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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 ...
- 311
4
votes
4
answers
36k
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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......
- 1,158
0
votes
1
answer
71
views
/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 ...
- 1
11
votes
1
answer
10k
views
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,...
- 211
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0
answers
527
views
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, ...
- 4,551
0
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0
answers
21
views
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/...
- 1,158
2
votes
1
answer
2k
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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 ...
- 1,015
0
votes
2
answers
342
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 ...
0
votes
1
answer
246
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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 ...
- 211
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0
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706
views
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 ...
- 1
0
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0
answers
174
views
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 ...
- 4,551
2
votes
2
answers
5k
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 ...
- 4,551
1
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0
answers
156
views
Active Directory with ubuntu compputer
How I open Ubuntu device by a user from active directory after joining this device to the active directory ?
2
votes
2
answers
3k
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.
...
- 22.5k
2
votes
1
answer
3k
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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0
votes
1
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1k
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.
...
- 101
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2
answers
273
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 ...
0
votes
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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29
votes
2
answers
28k
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 ...
- 1,235
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 ...
- 3,360
4
votes
2
answers
13k
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
3
answers
25k
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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1
vote
1
answer
326
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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1
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2k
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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
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1
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695
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 ...
1
vote
0
answers
2k
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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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 ...
- 409
31
votes
7
answers
34k
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 to see the status of services and/or units (and/or whatever else systemd calls them).
Ideally, I could also ...
- 1,375