Questions tagged [administration]
Questions about Computer Administration
205
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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
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1
answer
5k
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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
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3
answers
14k
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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 ...
- 1,064
1
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2
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751
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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
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0
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32
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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
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1
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126
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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
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520
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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 ...
- 672
19
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4
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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 ...
- 22.8k
0
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0
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49
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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
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37
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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
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79
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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
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1
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421
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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
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3k
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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 ...
7
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3
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5k
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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 ...
- 111
2
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1
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527
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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 ...
- 23
4
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1
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18k
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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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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 ...
- 183
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4
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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......
- 1,064
0
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1
answer
58
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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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9
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1
answer
8k
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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,...
- 191
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0
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427
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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, ...
- 4,451
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21
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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/...
- 1,064
2
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1
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1k
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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
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2
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309
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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
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1
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226
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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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642
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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 ...
- 1
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0
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166
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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
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2
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5k
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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 ...
- 4,451
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140
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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 ?
2
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2
answers
2k
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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.
...
- 22.1k
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1
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2k
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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 ...
- 19k
0
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1
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941
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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
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224
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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
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0
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1k
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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
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2
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26k
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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 ...
- 1,225
2
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1
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1k
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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 ...
- 3,240
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2
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12k
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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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2
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22k
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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 ...
- 153
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305
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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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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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664
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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
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0
answers
2k
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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
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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
29
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7
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30k
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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 ...
- 1,297
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40
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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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1
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866
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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 ...
- 41
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27
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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 ...
- 101
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159
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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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2
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2k
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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 ...
0
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1
answer
226
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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?
