The sudo command is a program for some Unix and Unix-Like operating systems, that allows a user to execute programs with the security privileges of another user. Typically those of a superuser or the root user.

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Can't sudo because password is disabled

So, in my attempt to prevent the default ubuntu user from logging in, and to prevent the default sudo user me from logging in with a password, and thus enforcing to use the private key, I managed to ...
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8 views

How PAM module reads /etc/shadow

I am developing a PAM module, which is much similar to pam_unix.so, the default authentication module. I also have a small test app that uses this module for authentication purposes. My module first ...
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1answer
32 views

Can't run /bin/bash… sometimes?

I’m on a Google Compute Engine which is running Debian Wheezy 7.4. I’ve been noticing strange things recently. For example, I can do sudo bash. But then, from root, I can’t do sudo -u anotherUser ...
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51 views

Require bash script to be run with sudo (not as root user)?

I want to require a bash script to be run as the current user with sudo, but prevent it from being run if it was executed as the root user directly. This is because I'm doing some setup actions for ...
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1answer
28 views

How to remove network-manager access from LightDM?

I'm running Ubuntu 14.04. I didn't like how LightDM gave access to network manager before anyone has actually logged in... So I added 'network-manager stop' to rc.local. It works just like how I ...
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34 views

Sudo fails when running as service

I have a program that runs as a normal user but sometimes needs to run a command that requires root privileges. So I made a shell script and gave the user permission to run that script with sudo. The ...
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1answer
18 views

ZFS send/recieve over ssh on linux without allowing root login

I wish to replicate the file system storage/photos from source to destination without enabling ssh login as root. I've tried a number of different combinations such as: sudo zfs send -R ...
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1answer
46 views

ssh + sudo + su into login shell

I have several machines I ssh into regularly only for the purpose of using sudo su to spend the rest of my session logged in as some special-purpose user. The general workflow is: mymachine:~ me$ ssh ...
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2answers
406 views

Difference when using backticks in double quotes and single quotes in Bash

Why to the following two executions differ in output? (I need double quotes for variables in my eventual command) $ sudo su -c "echo `cat /root/root_file`" cat: /root/root_file: Permission denied $ ...
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1answer
25 views

Renamed dylib, sudo stopped working

I renamed the dylib /usr/lib/libz.1.dylib for testing purposes, but when I tried to change it back I had to realize that sudo mv ... cannot be run because it needs exactly this dylib. How can ...
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1answer
21 views

Prompting for sudo password in a setuid root binary

I have a setuid root binary, with_sudo.bin, with the following source code: /* with_sudo.c */ #include <stdio.h> #include <sys/types.h> #include <unistd.h> #include <stdlib.h> ...
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How do I trick Nautilus to use “sudo mount” instead of just “mount”?

Thanks to new "security fixes" in mount or mount.cifs (I'm not sure which) it's no longer possible for normal users to mount anything, even if they are explicitly allowed using the user, users or ...
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1answer
44 views

Run ifconfig without sudo

I have an embedded Linux running on a imx6 platform. This is a freescale embedded linux. The problem is that there is no sudo available for this linux, but I need to activate and deactivate the wlan0 ...
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82 views

security: changing sudo permissions in /etc/sudoers on Debian 7.8

I have a single-user home system running Debian 7.8 console with desktop installed but default runlevel 3 boot. I added my limited user account to the sudo group using adduser for the purpose of ...
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3answers
799 views

Why does the system have /etc/sudoers.d? How should I edit it?

Last time, I asked about the risk of these (in /etc/sudoers): user_name ALL=(ALL) /usr/bin/vim /etc/httpd/confs/httpd.conf %group_name ALL=(ALL) /usr/bin/vim /etc/httpd/confs/httpd.conf ...
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1answer
36 views

Mac OSX permissions

Please, before jumping to much appreciated answer, please read this, as my problem is not related to files and folders permissions (chmod and chown). I have a Mac, with 2 user, one is an admin, and ...
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1answer
53 views

use sudo -s but show current folder name

Is there a way to use sudo -sbut keeping the current folder name in prompt? I want to see jw:documents nescalante$ instead of bash-3.2# when using sudo -s. Thanks!
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58 views

The risk of vim -Z (rvim)

Last time I asked about the way to prevent risks caused by these configurations: user_name ALL=(ALL) /usr/bin/vim /etc/httpd/confs/httpd.conf or %group_name ALL=(ALL) /usr/bin/vim ...
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1answer
33 views

Get back to sudo group without recovery mode

I made a big mistake when executed command: sudo usermod -G vboxusers me instead of "gpasswd" or "adduser", and I lost sudo group. Is it possible restore it, if I dont know root password, and have ...
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2answers
86 views

Why bother stopping 'root' from ssh login?

Best practice is to remove the ability of 'root' to login over ssh. However, I need to run some Ansible commands and am currently connecting via a user called "amdhske" and then have set this user up ...
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1answer
50 views

How do I run NetBeans (or ANY .app) as SUDO on OSX?

In addition to running other applications elevated (a bridge which I will burn when to it I get), I need to run NetBeans elevated in order to debug this application that I am writing. I would really, ...
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85 views

How to prevent security flows caused by sudo vim? [closed]

I learned doing sudo vim causes security problems. For example, user_name ALL=(ALL) /usr/bin/vim /etc/httpd/confs/httpd.conf or %group_name ALL=(ALL) /usr/bin/vim ...
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29 views

ssh indirectly to root

Is there a way to ssh to root on another machine even if PermitRootLogin is set to no, but ssh to a user is allowed and this user can just sudo -i to become root. For simple commands, I think there ...
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3answers
41 views

ssh config with sudo

I'm backing up my local machine to a remote server. Because I want to backup the whole local machine, even files that my local user doesn't normally have access to, I'm doing it using sudo, so the ...
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58 views

Gammu Error 500

I want to send server alerts as SMS messages from Ubuntu (13.04). I've downloaded gammu and installed - but I don't get very far. I have set the config file like this: [gammu] port = /dev/ttyACM0 ...
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60 views

Why does sudo fork before executing the process?

This question may seem a bit silly, but since in Unix-based systems, replacing an executable's image is done in a single step, replacing the currently running process, in the function call execve (and ...
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1answer
47 views

No command sudo found on Debian server

I want to have GitLab under domain git.blue-world.pl. I use Omnibus package downloads for GitLab CE for Debian 7. ssh -l login blue-world.pl cd domains/git.blue-world.pl/public_html wget ...
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2answers
61 views

Changing date on Ubuntu without sudo privilages

I am trying to automate a time change on Ubuntu 10.04 with a bash script using the date command. The script works, but it requires sudo privileges, however, the user who will execute the script does ...
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321 views

sudo - /etc/sudoers is world writable on Ubuntu OS

By mistake I change the permission of /etc/sudoers file on Ubuntu OS, now when applying any command using sudo, its giving error, sudo: /etc/sudoers is world writable sudo: no valid sudoers sources ...
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1answer
26 views

I removed the sudo,the I have no permission to install any program?

It's seems like a big problem. I can't login as root, because I use the fedora20, and I can not use sudo. What can I do now ?
2
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1answer
27 views

'Syntax error' while setting sudo.conf askpass variable with visudo

I want to set askpass program for sudo, i've made file /etc/sudoers.d/path-askpass with following content: # Path to askpass program Path askpass /usr/bin/ssh-askpass File was edit with visudo, ...
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1answer
17 views

Strange behavior when sudo -u

I'm trying to set up daily backups of my postgres database. To that end I've created a /home/backups directory, and inside it the /home/backups/postgres directory. The owner of /home/backups/postgres ...
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8 views

How to make an exception in a pam module?

I have 2 servers: A and B. I want A to connect to B via ssh (as a non-root user) to run a sudo command. But sudo on B requires a yubikey input to allow the command: auth required pam_yubico.so ...
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1answer
42 views

Running opera as a different user in linux

I am trying to run multiple opera instances as different users simultaneously in linux mint. I have done it with firefox in the past using the sux command like sux user1 firefox But if i try that ...
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1answer
25 views

Suse root group not having root rights?

I am in the root group of a suse machine but when I use sudo -u <myAccount> ... I get a Root privileges are required for... a few terminal commands: $ cat /etc/sudoers: ALL ALL=(ALL) ...
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2answers
69 views

Broken sudo on Google Compute Engine

Error : [ri@myinstance-1 etc]$ sudo su - sudo: >>> /etc/sudoers: syntax error near line 120 <<< sudo: parse error in /etc/sudoers near line 120 sudo: no valid sudoers sources found, ...
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2answers
87 views

how to undo sudoers file

I accidently command the root admin and sudo in sudo visduo file. Now with current user it is not rolling it back because i can't access it any more. File does not get opened with command sudo visudo ...
2
votes
1answer
279 views

sudo su “username” vs. su “username”

Please explain me, what is the difference between: sudo su "username" vs. su "username" Which has higher privileges? If I log into root with sudo su "username", I am root for one command only? So it ...
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1answer
104 views

sudo cp with wildcard syntax doesn't do anything in Linux

I have a directory containing files that are owned by root, from this directory I wish to copy all the files ending with errorAll to another directory. My wildcard syntax is correct because performing ...
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2answers
176 views

How to run command without “sudo”?

Nagios on my server isn't working properly. It can't execute command lftp without "sudo". Is there a way how to allow nagios run commands without using "sudo"? My /etc/group: ...
1
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1answer
33 views

force sudo to forget password immediately after exit everytime

If I execute sudo su, I am asked for my password ( [sudo] password for ... ) After do some stuff, I can leave this root mode with exit. If I execute again sudo su, I will not be asked for a password ...
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2answers
70 views

What makes the differences between `sudo CMD` and `sudo su` followed by `CMD`?

I have an SSH server with key only auth and I want to add a key for a new user. I log in with one user(kidmose), I try to append the key to a new user's(remote) authorized_keys and it fails: ...
2
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1answer
236 views

OpenWrt: Cannot install package sudo

I have installed the latest OpenWrt Chaos Calmer r42871 on my TP-LINK WR-842ND router. And everything's good except the problem: root@router:~# opkg install sudo Unknown package 'sudo'. ...
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1answer
59 views

output of sudo -l confusing me

(habdbsync) NOPASSWD: ALL, (habdbsync) !/bin/sh, !/bin/ksh, !/bin/csh, !/bin/tcsh, !/bin/zsh, !/bin/bash, (habdbsync) !/bin/su, (habdbsync) !/usr/bin/ssh, !/usr/bin/scp, !/usr/bin/slogin (root) ...
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1answer
638 views

su- no password entry for user? installing powerline with pip

I am trying to install Powerline using pip to do the installation. I'm installing in to /usr/local/lib/python2.7/dist-packages/powerline using the su -c "pip install github******" and get the response ...
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1answer
81 views

Replacement for “su user_with_sudo; sudo -s” for user without sudo-rights?

Let's say I have two user accounts: user (without any sudo permissions) user_with_sudo (with all sudo permissions) Now, I'm logged in as user but want to do something as root, e.g. switch to a ...
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2answers
1k views

Cannot change the desktop wallpaper in Ubuntu 14.04

I tried installing GNOME packages to Ubuntu 14.04(unity). I used these codes. sudo apt-get install gdm sudo apt-get install gnome-shell sudo apt-get install ubuntu-gnome-desktop ...
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65 views

Sudo suddenly not working correctly on OS X?

I have started noticing that commands requiring the use of sudo on OS X Mavericks are failing, e.g. I just updated Meteor and it couldn't write the launcher script sudo cp ...
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0answers
14 views

How to run a zle widget from an alias

I am using the sudo plugin for oh-my-zsh, which usually is bound to (Esc) (Esc). However, I'd prefer an alias for sudo !!. The plugin actually defines a zle widget, but how can I call this widget ...
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56 views

Adding group permissions with sudoers with NOPASSWD still prompting for password

Fedora 20, clean install. I added the following lines to my sudoers file with visudo: %power ALL=NOPASSWD: /sbin/shutdown I then created group "power" and added my account to this group. ...