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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3
votes
3answers
7k views

Authentication Failure while accessing super-user privilege

I get the root privilege when I type sudo. But when su asks for the Password, which I type in, the terminal says su: Authentication Failure
0
votes
4answers
824 views

sudo -s works but su does not in ubuntu?

I have Linux Virtual machine (ubuntu 12.04) installed on my Mac OS. On my terminal, user@192.78.0.1:~$ su password: su : Authentication failure user@192.78.0.1:~$ ls -lth /bin/su -rwsr-sr-x 1 root ...
0
votes
1answer
643 views

Unable to do su or sudo after upgrade from 13 to 14

I have upgraded from 13 to 14, and in the upgrade process a lot of errors occurred. Now I can't access root(via su command) or execute something like sudo apt-get install something. NOTE: This is ...
1
vote
1answer
191 views

echo to /etc/sudoers causing pasrse error

Using fabric if I echo to sudoers file for second time the file got corrupted works fine for first echo. What could be the reason? First echo: sudo('echo "django ALL=(ALL:ALL) ALL" | sudo tee -a ...
2
votes
1answer
2k views

Allow chown command to www-data user

Is there a way to allow chown command to be run by www-data but limiting it in a way that the files owner can be changed only to uids greator than that of www-data user? I already researched a lot ...
0
votes
2answers
343 views

What is the root user

If you use sudo su - or sudo -s you will get the full root certification "likewise a root user ". Is this user an official user or is it from canonical? ~$ sudo su - [sudo] password for username: ...
0
votes
1answer
859 views

How to make everything run as root in ubuntu? [duplicate]

I have setup a virtual machine for compiling software for linux which I develop on Windows. I setup to automount a windows folder, run compilation scripts and then just shutdown. The machine isn't ...
0
votes
1answer
98 views

Is there a better command to use than Sudo? [duplicate]

I used to hear you are supposed to use gksudo, but that is no longer installed by default. What should be used in its stead?
2
votes
1answer
318 views

Bash script using `sudo` runs correctly from cli but not when clicked to run

I am trying to get a simple bash script to run when I click on it. It runs perfectly from the cli but starting motion with sudo fails to start. I have that script setup with sudoers already for ...
0
votes
1answer
265 views

start Ubuntu 14.04 with terminal

I have a system with a dual-boot of Windows 8.1 32-bit and Ubuntu 14.04 64-bit. Ubuntu usually works but after I became root with the command "sudo su" and rebooted my PC it had a Black screen after ...
1
vote
0answers
45 views

Why does sudo sometimes asks for a different sudo user?

i have all my boxes setup to authenticate against openldap. when i logon with the local user (localmin) and run a command like; sudo service smbd restart it sometimes asks for the password of ...
1
vote
1answer
211 views

Setting proxy in Ubuntu terminal - proxy having special characters

I am trying to set proxy for a ubuntu server 12.04. Our proxy user name contains in the format: CompanyName\UserName and Password like: $test I tried to set proxy like this: export ...
8
votes
3answers
24k views

Adding NOPASSWD in /etc/sudoers doesn't work

On 14.04 here. I SSHed into my machine, added the following line to /etc/sudoers: myuser ALL=NOPASSWD: ALL And then tried running: sudo mkdir /etc/blah ...and I'm being asked for my password. ...
0
votes
1answer
397 views

kdesudo does not work in Kubuntu 14.04

I recently installed Kubuntu 14.04, after which kdesudo seems to work only half the time. For example: $ kdesudo systemsettings kdesudo(29361) KDESu::KDESuPrivate::KCookie::getXCookie: No X ...
1
vote
1answer
70 views

Re-disabling the root account

In ubuntu by default the su (root) password is not not set. I have set it by using the sudo passwd (see link). But I didn't like it. Can I go back to my original state.
2
votes
3answers
404 views

how to block a command from terminal?

I don't want any users in my machine to use a command in my machine other than root user. The command is given below. "sudo -E su" For security reasons
1
vote
1answer
133 views

Question about sudo fdisk -1

I've been trying to mount an external HDD to my ubuntu server (14.04) but when I try to use the sudo fdisk -1 function it tells me that its an invalid option, is there any way I can fix this? Or any ...
0
votes
0answers
17 views

I modified sudoers. All users can not use sudo now. How should I fix this? [duplicate]

I was trying to save times to type password for sudo because one of my scripts had to be randomly repeated quite often. I googled some information about how to bypass typing password and applied to ...
6
votes
7answers
4k views

Is the command `sudo rm /Desktop/filename` safe?

Is this safe to use? sudo rm /Desktop/FILENAME The reason for wanting to use sudo is I can't see the file. I accidentally typed in sudo rm /Desktop/index.html. It didn't find it but could ...
1
vote
0answers
1k views

How to check if fstab file is correct without sudo?

I updated from saucy to trusy. After that, using sudo segfaulted: fkalter@London ~> sudo whoami [sudo] password for fkalter: YubiKey for `fkalter': [1] 16961 segmentation fault ...
1
vote
2answers
65 views

Shell scripting, [duplicate]

I made a simple update script. Now My question was is it possible to run it automatically by loggin in on the Ubuntu Desktop and automatically provide my password (sudo) for this so I don't have to do ...
0
votes
1answer
466 views

No command '“alias' found

Recently, Ubuntu stopped detecting my android device when I plugged it in with USB, so I was looking to fix the problem. In the process, I found this thread and I followed the steps on it. Only on the ...
0
votes
1answer
99 views

don't have permission or doesn't exist

I'm trying to configure an Oculus rift and I have a configuration script that needs to be executed: GLADOS@deathbox:~/Desktop/OculusSDK/Tools/OculusConfigUtil$ ./OculusConfigUtil_i386 bash: ...
0
votes
0answers
46 views

I don't want other administrator to change my password [duplicate]

I have one administrator account in my system which named as "admin". One more admin account called "test". I don't want test account to reset "admin" account and root account password in my system. ...
2
votes
1answer
2k views

Block a command from sudo user

I don't need an administrator to change my root password. I don't want any sudo user to execute this command: sudo passwd $root I have tried it in the sudoers file using the following command: ...
2
votes
1answer
587 views

How to run backintime as a user

To allow users to run backintime. I am usually running backintime-kde on ubuntu in the following way: sudo su ssh-agent bash backintime-kde4 --config /root/.config/backintime/config --profile-id 1 ...
0
votes
2answers
611 views

How do I enter my sudo password? [duplicate]

I know my sudo password but terminal not to permit me to enter any keyword into
1
vote
1answer
154 views

creating power group

I want to create a group that can run some privileged commands but not all. For example, a power user can access the home files (from one user to another), but it shouldn't be allowed to run apt-get ...
-3
votes
1answer
91 views

How can I disable password on termina? [duplicate]

I am trying to install a software through terminal. It asks for my password and i have given the correct password but still it says wrong password. Then i removed all kind off password from my login ...
2
votes
2answers
1k views

can't run sudo from terminal

I'm having an issue where I can't even run sudo from the command line, like for example I need to see or edit a file that required the use of sudo with nano or some other sudo nano /path/to/file But ...
2
votes
1answer
419 views

How can I identify the program that has written information to a log file?

I recently got a message that something had failed to sudo on my Ubuntu laptop. At the time, I don't believe I was running anything that would need sudo. The messages that appeared in ...
0
votes
1answer
974 views

I can't add myself(default user) in sudo group in ubuntu [duplicate]

I accidentally changed my primary group using the following command. sudo usermod -g localgroup shantanu #shantanu is my username I interrupted this process as soon as I realize what is happening. ...
2
votes
3answers
805 views

Completely Messed up sudoers file and su Operations

I am in a really bad condition right now.I am jotting down the steps I did to get myself into this situation. My objective was to disable sudo on my machine. I am running Amazon Ec2 Ubuntu 12.04 I ...
0
votes
1answer
172 views

Can't sudo after removing password from administrator account

I'm using Ubuntu 13.10 64bit. In the "System Settings"->"User Accounts" I chose the "Login without a password". This was my only administrator account, so according to this answer, I encountered bug ...
0
votes
1answer
2k views

Can't get nautilus to go sudo with gksu [duplicate]

I was recently reading some linux articles and stumbled on a faster way to do sudo tasks the gui way by installing a package called gksu-nautilus which allows me perform tasks with root permissions ...
0
votes
2answers
898 views

gedit problem when open by terminal

when I open terminal and run the command sudo gedit first.cpp it shows this error in terminal: (gedit:24589): IBUS-WARNING **: The owner of /home/bonny/.config/ibus/bus is not root! (gedit:24589): ...
0
votes
1answer
218 views

Is there any way to change the "Invalid password, please try again' text?

I wanted to change the "Invalid password, please try again' text to "PERMISSION DENIED... and... YOU DIDN'T SAY THE MAGIC WORD!" Is this even possible?
6
votes
1answer
6k views

sudo: unable to stat /etc/sudoers: No such file or directory - File Exists

I am one of a few people managing a gaming server. The Server is currently running Ubuntu 14.04, which was installed just 3 weeks ago. Everything was running fine until a few days ago, we've had a ...
2
votes
1answer
1k views

Permission denied error after SSH login

I am having Permission denied errors after logging with non root user (which has permissions to do "sudo -i" command). I get these errors: -bash: /bin/uname: Permission denied -bash: [: =: unary ...
1
vote
2answers
313 views

Specify password for sudo in script

I am making a script that will update my system (and do some other things, but that doesn't matter). I want the script to run sudo apt-get update and sudo apt-get dist-upgrade --yes automatically. I ...
0
votes
2answers
2k views

How to get back deleted data using sudo rm -rf [duplicate]

I have deleted folder using sudo rm -rf. How to recover back? Im not able to find it in trash folder
3
votes
1answer
309 views

Non-sudo wifi deactivation

I have ASUS N76VB laptop. I am affected by this bug in asus_nb_wmi driver, so I can't use Fn-F2 key combination to toggle wifi. The guy from the thread about bug workaround uses rfkill command to ...
1
vote
2answers
179 views

Find and download a package without sudo using aptitude [duplicate]

I would like to install a bunch of packages (glogg, libprotobuf7, libleveldb1, libsnappy1, libhdf5-7) on an Ubuntu system on which I do not have root privileges. (I understand that this can be ...
1
vote
1answer
582 views

Global sudo session in ubuntu

Is is possible to keep the sudo session for sometimes? I mean when you open synaptic, each time you have to authenticate. In a single terminal, sudo session exits for a specific amount of time. You ...
3
votes
2answers
3k views

add alias to root

I need to execute a command for my system to search for new sd cards and to be able to execute it I need to me logged on as root. Simply using sudo with the command does not work. This is not a ...
1
vote
0answers
47 views

Strange issue using sudo

When I try to use sudo this is what happens chris@vaio:~$ sudo sudo: 424273033461091241000: invalid value except that doesn't do it justice: I have been having issues with the latest ...
0
votes
1answer
826 views

I don't have permission to access this device on iftop and need to be root to run NetHogs

I have two dilemma's here: One is, I tried using iftop but it said I don't have permission to capture on that device (socket: operation not permitted) I can use ifconfig just fine. Also, I installed ...
0
votes
3answers
1k views

setresuid operation not permitted when calling via php

I've got following Problem: my Apache and PHP script are running as user www-data. I want to call a script that can only be executed as root, so I added a new File to /etc/sudoers.d to allow this ...
1
vote
2answers
965 views

Why do I get `egrep: /etc/shadow: Permission denied` when running this awk command?

Does anyone know why this command: sudo awk -v LIMIT=50000 -F: '($3>=LIMIT) && ($3!=65534) {print $1}' /etc/passwd | tee - |egrep -f - /etc/shadow > ...
2
votes
2answers
650 views

Sudo error, setuid [duplicate]

I'm using Ubuntu 14.04 and I run some command series on Terminal. But at one time I ran sudo chmod 777 /usr/bin/ -R And giving some permissions on this directory. After that, I'm continue my work, ...