Questions related to the sudo command that allows users to run programs with the privileges of a different user (normally the root user).

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0
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1answer
19 views

Retrieving Files from Broken Ubuntu

I run Ubuntu 14.04. I recently ran the command sudo apt-get -f install, which, for some reason, ended up removing the boot files. So, I reinstalled Ubuntu on a different partition. However, I would ...
0
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0answers
123 views

`sudo hostname` checks hostname resolution - can I turn that off?

I am trying to get Vagrant working with Ubuntu 16.04 (xenial). Apparently there are recent changes to hostname when called with sudo and the output to stderr is interfering with the way Vagrant ...
3
votes
1answer
83 views

Automating SSH login gives unresponsive remote-shell, dropping back to client-terminal (without errors)

I have a problem with the tool expect under Ubuntu 14.04 LTS. I want to automate ssh logins to some Sophos UTM Firewalls and evelate my rights directly after with "sudo su -" and the correct password. ...
0
votes
0answers
18 views

Ubuntu sudo broken/other probelem, Ubuntu Server

So i have given accses to / for everyone, which at the time i did not know this basically breaks the system. Tried a few things nothing worked. So i reinstalled ubuntu, did the install normal for ...
0
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0answers
56 views

Failed to fetch error: Hash Sum mismatch

I can't update. I want to install GNU Radio also but system is not getting update. sudo apt-get install gnuradio also doesn't work.
0
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0answers
24 views

I'm a new user who's pretty lost

My problem is this: I'm trying to permanently disable my touchscreen because it is cracked and occasionally moves the pointer on it's own. I have tried the xinput solution but as many other forums ...
0
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0answers
24 views

Can't run any programs because of less permissions and how to give a user full sudo privileges ?(Ubuntu 14 Server)

So, I created a Ubuntu VPS with AWS. I am very new to Ubuntu so I need a GUI, therefore I installed TightVNC to use it from my Win 10 PC. Now here are the problems: 1) The server has a default user ...
3
votes
3answers
79 views

Can't Use SSH Keys Unless Running SSH With Sudo

For some reason I'm unable to SSH from my Ubuntu 15.10 machine to a remote server using a private key if I run ssh without sudo. Server side config is fine. I have tested the private key from my ...
13
votes
2answers
4k views

What is the name of the security concept that explains why Linux asks for root password?

Whenever I'm installing new software or making changes to the system, Linux asks for the root password. What is the name of this security concept and where can I research more information about it?
1
vote
1answer
121 views

Ubuntu terminal cant type special characters like backslash (\), slash(/), semicolon (:), etc properly

I'm running Ubuntu 14.04 without GUI and i'm having problems entering characters like backslash, slash, semicolon and so forth. The keys which would normally enter these characters print out all kinds ...
0
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0answers
31 views

what is the diffrence b/w “remove write-protected directory” & “descend into write-protected directory”?

am new to linux world, am practising basic commands, i tried to use rm command to remove directory/folder from current directory which was /, without providing super user permission or sudo. it says ...
10
votes
1answer
575 views

Accidentally mounted a partition on /usr

I mounted a partition on /usr accidentally. Hence, I have lost access to sudo command and can't unmount the partion. I am using AWS EC2 instance and don't have password for root user set. What are ...
0
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0answers
22 views

sudo chown -R $USER:$USER /usr/ [duplicate]

I got a problem, I run this command sudo chown -R $USER:$USER /usr/ And after that I got this error on every sudo I make sudo: /usr/bin/sudo must be owned by uid 0 and have the setuid bit set ...
0
votes
1answer
194 views

How to run GUI applications as root

UPDATE I would like to know which is the recommend way of running GUI applications as root, mainly because what I'm trying isn't running smoothly. I get some annoying warnings that makes me think ...
0
votes
1answer
18 views

How to start a process by another group using sudo

I wanted to start one process as a non root user with a group (non-root) by sudo. I added the line below in /etc/sudoers xyz ALL = (xyz:abc) NOPASSWD: <cmd> But I am always getting the ...
0
votes
1answer
36 views

Can't make a shortcut to work (properly)

I made a shortcut for PyCharm following this instruction (created a *.desktop file; before that I launched the application via terminal by sudo sh pycharm.sh comand). However, the shortcut I made ...
0
votes
1answer
373 views

Sudo apt-get update command is getting error

I am using Ubuntu 15.10 and 64-bit system. I am new to Ubuntu I am trying to use sudo apt-get update but I am getting error I am not able to understand what is wrong and I don't know how to rectify ...
2
votes
1answer
34 views

Make locally compiled programs request password graphically

I have an application that I downloaded from my class' website for our custom avr robot and it requires root privileges to send our binaries to the robot via usb. When I try to use it with sudo, the ...
3
votes
1answer
128 views

Difference between 'sudo apt-get' and 'sudo -E apt-get'

I'm using Ubuntu 15.10 guest on VMWare Player (7.1.3 build-3206955), with Windows 10 as the host OS. I'm able to use Firefox to browse the web inside the guest, however I'm unable to use apt on the ...
0
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0answers
22 views

How to restrict command using sudoer doesn't work

I created one user as filemanager. There are some users have to su as filemanager to run script which execute many commands. But SCP is not allowed for security reasons. I am trying to restricted '...
1
vote
0answers
62 views

Attempted to open Unity with sudo, now Unity messed up

It seems I really messed up with unity by trying to open a window as admin . I ran this in the command-line : User@Computer:-$ sudo unity /var/cache/apt/archives After that brilliant and inspired ...
1
vote
1answer
67 views

sudo passwd command with no-interactive mode

Context: I created a Virtual Machine with Packer for Vagrant system into a Ubuntu 14.04 server OS. All runs perfectly but this is a development VM (I'm alone on this) and I want to administer my ...
7
votes
1answer
858 views

Weird messages when using sudo

Whenever I run a sudo command in the terminal, this happens: arun@arun-GP70-2OD:~$ sudo apt-get update sudo: /etc/sudoers.d/README is world writable sudo: /var/lib/sudo writable by non-owner (040777),...
21
votes
3answers
1k views

How do I run a sudo command needing password input in the background?

I have recently disabled sudo's authentication caching ability so that it now prompts me for a password every time. And though this is good for security, it has caused one slight problem which I ...
1
vote
1answer
121 views

Difference between sudo -u and su -c

The following is being executed from an account with sudo privileges: I have a user tomcat created with the following command sudo useradd -g tomcat -d /usr/local/tomcat -m -s /bin/false tomcat I ...
1
vote
0answers
9 views

Please Help! Can't log into root Ubuntu 14.04 LTS [duplicate]

I am hoping someone can help me out here. For some reason my system has stopped letting me sudo. I can log into the machine just fine. When I attempt to install a package or sudo -i, I get asked ...
0
votes
0answers
23 views

How to copy data from a Mac formatted hard drive to local hard drive [duplicate]

I am a Windows user and new to Ubuntu, the reason I installed Ubuntu because I need to copy data from a Mac formatted (3.5" internal) hard drive (hd) (via an USB hard drive enclosure) to local hard ...
0
votes
0answers
22 views

How to resolve invalid sudoers file on ubuntu installed on AWS

I've set up a Ubuntu instance on AWS and foolishly modified the sudoers file and it is now returning a parse error when I try to run sudo commands, so I am unable re-edit the file. I found a command ...
0
votes
1answer
67 views

www-data running command not working

I'm using nginx with php , and I would like to run some command with exec() http://php.net/manual/fr/function.exec.php . the current example work perfectly echo exec('whoami'); but when I try with ...
0
votes
1answer
87 views

Why apache is unable to write with permission set as 2775?

I have installed LAMP as: sudo apt-get update sudo apt-get upgrade sudo apt-get install lamp-server^ If I understand correctly, apache server will be running with sudo privileges? If yes, for a ...
1
vote
4answers
261 views

Sudoers.d Permissions denied

I am running ubuntu 14.04 in DardDrive. I was taking the Steps for Setting up and Running sudo located here http://snag.gy/JAGgt.jpg. But every I type sudo "whatever" as user ($), I get the following ...
4
votes
1answer
110 views

How is the guest account prevented from using su and sudo?

It's already known that the guest account can't use su or sudo: Why is su disabled from guest sessions? Sudo not available in guest login How is this done? My guess would be apparmor. However, ...
1
vote
3answers
101 views

How to prevent scripts/commands hijacking your session's cached sudo ability?

If I run a sudo command it will ask me for a password, however in that Terminal session for the next few minutes it will allow me to run sudo commands without asking me for a password as it will cache ...
0
votes
0answers
47 views

No Sudo Permissions (No Username?)

When I login with Ubuntu it shows that I have no username and when I attempt to execute any code with sudo, I receive the following error: I have no name!@ip-172-30-2-112:~$ id uid=1000 gid=1000 ...
-2
votes
1answer
98 views

2 warnings 1 error while using sudo apt-get update [duplicate]

Whenever i try sudo apt-get update I get following messages: W: GPG error: http://download.opensuse.org Release: The following signatures couldn't be verified because the public key is not available:...
0
votes
1answer
44 views

How to disable the need for making operations with sudo

I can read my Dropbox directory from Ubuntu OS. However, in order to delete/create/move file to this directory I must use "sudo". This means that I can do these operation only by shell. Is there any ...
0
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0answers
224 views

How to solve server certificate Verification failed!

Recently I installed a complete ubuntu package on virtualbox and use it via vagrant ssh in windows.from yesterday i have a annoying problem,I cant use sudo commands for install,update or everything ...
0
votes
1answer
65 views

I can't update any packages nor can upgrade and all this started when I tried to install flashplugin which popup after I tried to upgrade last time

sudo apt-get update sudo: unable to mkdir /var/lib/sudo: No such file or directory [sudo] password for md: E: List directory /var/lib/apt/lists/partial is missing. - Acquire (2: No such file or ...
0
votes
1answer
78 views

can't compile .cpp file with clang even after installing clang3.8

I installed clang3.8 with bunch of other packages that I usually need, after a fresh installation of Ubuntu 15.10 using following command: $ sudo apt-get install clang-3.8 clang-3.8-doc libclang-...
0
votes
0answers
35 views

error dpkg in terminal ubuntu

I'm downloading brackets in github https://github.com/adobe/brackets/releases/tag/release-1.6+eb4 please help me dpkg --install ~/Download/Brackets.1.6.Extract.64-bit.deb dpkg: error: parsing file '/...
0
votes
0answers
32 views

Error while running “sudo apt-get update ” [duplicate]

When i run command sudo apt-get update, following error occurred : W: Failed to fetch http://dl.google.com/linux/chrome/deb/dists/stable/Release Unable to find expected entry 'main/binary-i386/...
0
votes
1answer
51 views

How to regain sudo permission when grub menu is unavailable?

I inadvertently failed to append myself to a group by using usermod -G group_name user_name instead of usermod -aG group_name user_name and now belong only to the group_name group. The problem is: I ...
0
votes
1answer
71 views

Not able to sudo after running `chown -R username:usergroup /*` [duplicate]

I am fairly new to Ubuntu. I am currently using Ubuntu 14.04 version. I am stuck into a problem that my primary user account is not functioning after i ran a command chown -R username:usergroup /* on ...
0
votes
1answer
78 views

issue with root access etc

I cannot do anything in ubuntu without being root all of a sudden. When I run emacs it says it cannot access files (and will run in sudo and works fine). firefox throws security issues until im root ...
0
votes
1answer
135 views

sudo: unable to resolve host error but still works

I recently changed my Ubuntu 15.10 laptop's name to Nick-Laptop: Ubuntu and now whenever I use sudo I get the error sudo: unable to resolve host Nick-Laptop: Ubuntu However the command still runs, ...
0
votes
2answers
67 views

SSH jump + Lock User account on remote machine, but allow user to use sudo?

I am trying to configure a server that users will log into. Users will use this server as a box to jump into other servers via ssh. From jump server to others will use SSH key based authentication. ...
0
votes
0answers
20 views

use a different password for the prompts

I installed Ubuntu for the first time since 2006, its awesome. So i installed and went for the encrypted home dir install, just for fun. Now every time i need to do something that requires sudo I am ...
0
votes
0answers
22 views

Need help being able to run sudo and bash commands. New and confused [duplicate]

Okay, so for some reason when I use sudo or bash or most other commands, I get this: Command 'sudo' is available in '/usr/bin/sudo' The command could not be located because '/usr/bin' is not included ...
2
votes
0answers
54 views

OpenSSH asks for root@hostname password instead of user@hostname password

So I have this other desktop PC, that serves as my server, primesystem and a laptop as my client, zerosystem that is connected to it. They both serve as my ssh-server and ssh-client respectively, and ...
0
votes
0answers
35 views

Multiple admin (sudo) accounts issue

I have a computer with two admin accounts my was the second one created, now when I try to make anything in terminal as sudo user like tar it automatically give permissions to the first user as the ...