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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2answers
25 views

Can we install a package through a shell script?

I'm trying to write a shell script so that when I reinstall my Ubuntu again. I could just run script and retain all the packages. And I'm planning to pass password in form of argument. My question ...
0
votes
0answers
7 views

Troubleshoot personal internet failure, vol. 2

This a follow-up from here: Troubleshoot personal internet failure, where: sudo service NetworkManager restart was proposed. However, Internet failure again today. I did the restart, but this ...
0
votes
0answers
18 views

sudo and su both not working

When I am running the command sudo apt-get update and after entering the password I am getting xxx is not in the sudoers file. This incident will be reported.. I have searched for this found ...
0
votes
0answers
6 views

Correct password cannot be authenticated to run Synaptic Package Manager GUI

I cannot access my synaptic package manager(in GUI) due to authentication error. Even though I enter the correct user password, it always say that "Your authentication attempt was unsuccessful. Please ...
1
vote
0answers
15 views

How to run a sudo command without a password where the command can be altered? [duplicate]

I know this question gets asked a lot but my situation is a little different. I am using Qt and the user has the ability to change timezones. Therefore, the following commands need to be used ...
-1
votes
1answer
42 views

Ubuntu 16.04 sudo w/ NIS too slow, bind(2) lotta ports and remains lotta connection between the NIS domain server

The title says all. anyway, I just upgraded my server from 14.04 LTS to 16.04 LTS and I realized the sudo runs too much slower than 14.04. I strace'd and got following result: $ sudo strace sudo ...
0
votes
1answer
19 views

How to reverse these settings?

I followed the first answer give by user "dginsd" from here Discs in DVD Drive not being read because I couldnt mount a game I had on a DVD disk and thought that ubuntu wasnt seeing my DVDrom drive ...
0
votes
0answers
18 views

how to fix the following error: User is not in the sudoers file [duplicate]

When I try to install skype from the terminal I get the following: sudo apt-get install skype [sudo] password for tana: User is not in the sudoers file. It will be informed of this incident. Also ...
0
votes
0answers
9 views

How to Upgrade Ubuntu 13.04 [duplicate]

Lately I've gotten very involved with Linux Ubuntu, but I think I have a barricade in my way. Every time I try to upgrade via Software Manager, it says to check my Internet connection because it ...
0
votes
1answer
11 views

Protect root-owned script against tampering and run unattended w/ sudoers' NOPASSWD

Using /etc/sudoers I gave a non-root user (anyuser below) permission to sudo-execute a root-owned script (test-script below) with the NOPASSWD: tag set. The script's permission octal value is 0550. ...
0
votes
1answer
21 views

Getting to root [duplicate]

I've checked the question archive and can't find an exact answer to the following. I have just installed Ubuntu on a new PC. While I'm fairly proficient in lumbering about in MSs operating console, ...
0
votes
1answer
35 views

Passwordless sudo for cluster computer [closed]

I have been at this for awhile now and can't seem to get it right. I have a 17 node Pi cluster that I need seamless access on both root and user X. I have already set up SSH and the rsa keys, ...
0
votes
2answers
28 views

Visudo Command Not Working on Sudo User

I recently bought a vps and I have am fairly new to using ubuntu on it since I have always used shared hosting. I have created a sudoer user and it worked perfectly fine yesterday except when I ...
0
votes
1answer
14 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
votes
0answers
61 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
0answers
34 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
17 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
votes
0answers
34 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
votes
0answers
23 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
votes
0answers
15 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
37 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 ...
11
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
54 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
votes
0answers
25 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 ...
-2
votes
0answers
48 views

Warnings while running graphical apps as root

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 whether I'm ...
10
votes
1answer
557 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
votes
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
127 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
17 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
28 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
112 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 ...
1
vote
1answer
29 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
63 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
votes
0answers
20 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
51 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
55 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
844 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 ...
24
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
57 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
17 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
23 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
49 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
101 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
0answers
63 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, ...
3
votes
3answers
70 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
40 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
63 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 ...
0
votes
1answer
39 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 ...