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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14
votes
3answers
40k views

Disable sudo permission to user from command line

I have activated root user in ubuntu and want to use ubuntu as server with no DE. For this I want to disable sudo privilege given to first user. How can I do this from command line ? I know I can use ...
14
votes
0answers
16k views

sudo: unable to resolve host (name already added to /etc/hosts) [duplicate]

Whenever I use sudo, I get this: sudo: unable to resolve host dave00-G31M-ES2L Here is my /etc/hosts: dave00@dave00-G31M-ES2L:~$ cat /etc/hosts 127.0.0.1 localhost 127.0.1.1 dave00-G31M-ES2 # ...
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?
13
votes
3answers
25k views

Mounting filesystem with special user id set

I want to mount the device /dev/sda3 to the directory /foo/bar/baz. After mounting the directory should have the uid of user johndoe. So I did: sudo -u johndoe mkdir /foo/bar/baz stat -c %U /foo/bar/...
13
votes
3answers
38k views

Mount VirtualBox SharedFolder in Ubuntu VM on boot

I have a Ubuntu VM running in VirtualBox. I have a Shared Folder set up as myshare I have a folder created in my home directory (~/jamesw) as host. using the line sudo mount -t vboxsf myshare host ...
13
votes
3answers
8k views

sudoers - simple explanation requested

Everytime I want to be able to run something that requires me to be a sudoer too many times, I need to google for the formatting of /etc/sudoers to remind me again what exactly is the proper way to ...
13
votes
1answer
532 views

Is there any way to allow user to execute commands for 2 days only

How to give a sudo command permission for a specific time? is there any way to give rights to perform a specific command for 2 days only in sudoers file.?
13
votes
2answers
4k views

Why am I suddenly not a sudoer anymore? [duplicate]

I booted up Ubuntu 12.10 today, and when trying to sudo, I entered my password as usual but it had said I'm not a sudoer. So I go and check my account under User Accounts, and for some reason Im now a ...
13
votes
2answers
45k views

sudo: unable to resolve host ubuntu-server [duplicate]

I have a problem with sudo. Every time when I trying to use sudo I got this problem: sudo: unable to resolve host ubuntu-server My /etc/hosts file: 127.0.0.1 localhost 127.0.1.1 ubuntu-...
12
votes
2answers
106k views

Launch Sublime Text 2 from terminal [duplicate]

I am new to Ubuntu and is trying to configure my environment so i can launch Sublime Text 2 directly from the terminal. I followed the solution on this post but no luck so far. These are steps I did (...
12
votes
4answers
6k views

How to prevent system applications (like the Software Center) from asking for password?

I'd like Software Center, Update Manager and some other system management applications to work without asking for password (like sudo does if configured with NOPASSWD) but only asking for a ...
11
votes
1answer
15k views

Cannot echo “hello” > x.txt even with sudo? [duplicate]

Possible Duplicate: sudo & redirect output I'm trying to create a file in /var/www, but even with sudo this fails: user@debVirtual:/var/www$ sudo echo "hello" > f.txt -bash: f.txt: ...
11
votes
6answers
4k views

Why can't non-admin users install software?

This is probably something I don't understand since I am used to Windows and am only starting out with Ubuntu. I know that software in linux comes in packages what I don't understand is why can't non-...
11
votes
2answers
404 views

How come you don't need sudo privileges to update the packages list in the 10.10 Update Manager?

I have noticed that when I press the "Check" button from the Update Manager in Maverick, it starts directly downloading the information on packages without asking me my password (sudo verification) ...
11
votes
1answer
1k views

Why I have to type my password after exiting a sudo -i session?

sudo -i in the terminal will made normal user into root user & after changing into root user if we exit then again we will be back to normal user.If we try again , next time it directly takes me ...
11
votes
1answer
19k views

How to run a command as a user whose login is disabled?

I am trying to use the su command to run an application as another user In this case I am trying to run irssi blah@ubuntu: su - [username] irssi (enter password) blah@ubuntu: (nothing happens) ...
11
votes
3answers
16k views

Save an edited file in nano, but no permissions

I edited a file in /etc/ that I want to save, but forgot to open it using sudo. I remember there was a command to save such a file in vi, and want to know if there is any such way to do it in nano? ...
11
votes
2answers
1k views

I broke Sudo after an upgrade from 9 to 12.04.1

Currently sudo will prompt for a password, but absolutely nothing happens after that. No errors of any kind. I've checked the sudoers file, it passed the visudo syntax check, here's the setup: # # ...
10
votes
3answers
1k views

How to rename sudoers back to its original naming? [duplicate]

Today I made a big mistake, I run the command mv /etc/sudoers{,.bak} on my ubuntu machine and now sudoers file is missing This is the message given in terminal wherever I use sudo sudo: unable ...
10
votes
1answer
3k views

How to make 'sudo' grab the password from a file?

I want to run a command that requires the sudo password say: sudo apt-get update Isn't this supposed to work (I have stored the password in a normal text file passwd.txt): sudo apt-get update <~...
10
votes
2answers
27k views

How to solve “sudo: /etc/sudoers.d is world writable”

How can I fix the following error with sudo? /etc$ sudo sudo: /etc/sudoers.d is world writable usage: sudo [-D level] -h | -K | -k | -V usage: sudo -v [-AknS] [-D level] [-g groupname|#gid] [-p ...
10
votes
2answers
46k views

Can I add myself to group `root'?

$ id uid=1000(kev) gid=1000(kev) groups=1000(kev),4(adm),24(cdrom),27(sudo),30(dip),46(plugdev),109(lpadmin),124(sambashare) $ ls -l /etc/sudoers -r--r----- 1 root root 723 Jan 31 2012 /etc/sudoers ...
10
votes
1answer
571 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 ...
10
votes
3answers
964 views

Is there a desktop-neutral gksudo?

There are various tools for various desktops that aim to run a graphical application as root. gksudo, kdesudo, empower, etc... But what if I'm writing a script that could be used on any Linux desktop?...
10
votes
1answer
6k views

sudo su doesn't change users for mysql

Last night, on my server, I did: sudo su - mysql to change to the mysql user so I could run the mysql client, which is set up so it will only authenticate from the mysql account. I successfully ...
10
votes
1answer
1k views

Why does sudo ask for a password in window after I've just authenticated in a different one?

If I am using the command line in xterm, gnome-terminal, etc., I can keep sudo from re-prompting for a password, within some limits, or I can disable it. As a compromise between usability and ...
10
votes
2answers
550 views

how to be warned if terminal has sudo privileges and also show how much time is left?

How to see in the terminal that you have sudo privileges? (so knowing I have these privileges, I can just type sudo -k) It would be better to not add too much information into the terminal also, just ...
10
votes
1answer
48k views

“error: XDG_RUNTIME_DIR not set in the environment.” when attempting to run nautilus as root

I am attempting to run nautilus as root but when I run "sudo nautilus" from the terminal, I get the following error: error: XDG_RUNTIME_DIR not set in the environment. (nautilus:9341): Gtk-...
10
votes
2answers
16k views

Enable passwordless sudo as a specific user

I have two users on my system: itsadok, my main user, and elasticsearch, a user with a different ulimit for running ElasticSearch. I would like to be able to run stuff as the secondary user without ...
10
votes
2answers
510 views

Run only parts of a script as sudo, entering password only once

I am writing a script (actually a combination of scripts and makefile) that installs external dependencies: some apt-get commands, some git cloning, building, installing, adding users to groups, ... ...
9
votes
3answers
4k views

Difference between cat and sudo cat? [duplicate]

Can you tell me what the difference is between cat and sudo cat? All I know so far is that cat is used for displaying contents of file and concatenation.
9
votes
3answers
564 views

sudo permission doesn't time out durring apt-get upgrade

Consider this: You type $sudo apt-get upgrade and get a list of things that need upgrading with a "Y\n" confirmation. before you can read the list, and type "Y" or "n", the phone rings, or your boss ...
9
votes
4answers
2k views

Why does echoing these parameters with sudo not work? [duplicate]

Possible Duplicate: sudo & redirect output These are suggestions given by powertop to save energy: echo 1500 > /proc/sys/vm/dirty_writeback_centisecs echo 1 > /sys/module/...
9
votes
1answer
817 views

How could I have dropped out of sudoers? [duplicate]

I started to receive a message dims is not in the sudoers file. This incident will be reported. about myself. How could this happen? The suspicious command I made was creating group "advanced" ...
9
votes
3answers
22k views

Error after sudo-ing “sudo: must be setuid root”

On a colleagues computer, everytime I use a sudo command, I get this error: sudo: must be setuid root I tried various things mentioned on the internet, like changing the permissions to 4755 from a ...
9
votes
4answers
87k views

'Some index files failed to download' while updating

When running sudo apt-get update I get these following errors: Err archive.ubuntu.com quantal InRelease Err archive.ubuntu.com quantal-updates InRelease Err archive.ubuntu.com quantal-backports ...
9
votes
3answers
24k views

No password prompt at sudo command

Whenever I issue command sudo apt-get install ** it does not ask for password, not in my admin user too. How to make it prompt for password? My sudoer : ubuntu:~$ sudo cat /etc/sudoers # # This ...
9
votes
4answers
14k views

How to give shutdown privileges to a user?

I am using Ubuntu 11.04. I want to run a script which checks for a running process and shuts down the system when that process ends. To do this, the user requires shutdown access so that the script ...
9
votes
6answers
6k views

Disabling shutdown command for all users, even root - consequences?

I would like to disable the shutdown command for all users, even root, on an Ubuntu Server installation. The reason I want to do this is to ensure that I don't get into the habit of shutting down the ...
9
votes
4answers
26k views

How to fix sudo after “chmod -R 777 /usr/bin”?

I enetered chmod -R 777 /usr/bin and now sudo is not working. It is giving error that sudo must be setuid root. On looking via Google, some advice said to run chown root:root /usr/bin/sudo chmod ...
9
votes
1answer
2k views

How to check if sudo password has been entered for this terminal session?

As said in the headline, I need to check if the sudo password has been entered for this terminal session in a shell (aka, if I have sudo rights now). If I have it, I would like to do one thing and if ...
9
votes
1answer
8k views

rm: cannot remove `/run/user/root/gvfs': Is a directory

Whenever I type a command which is similar to sudo apt-get install or anything like this I get this kind of error: $ sudo su # exit exit rm: cannot remove `/run/user/root/gvfs': Is a directory How ...
9
votes
2answers
15k views

Root's .bashrc not executing on sudo -i

On one of my Ubuntu 11.10 servers, when I use sudo -i to become the root user, root's .bashrc is not being executed. On all other servers, whose relevant configurations are identical as far as I know, ...
9
votes
1answer
37k views

Open file or application as root from GUI

Is it possible to open a file or application as root from the GUI? My ideal would be right-clicking on a file or an application and seeing an "Open as Root" choice in the context menu, after which I ...
8
votes
2answers
15k views

Run apt-get without sudo

This might be a very naive question, but I wanted to know how I could give multiple users access to a single computer without making them root users. How would I give them limitted sudo access such ...
8
votes
2answers
51k views

Cannot connect to X Server when running app with sudo

When I am running some software using sudo command it showing error like cannot connect to X server For example if I run the following command: $ sudo gedit /etc/profile I am getting ...
8
votes
5answers
1k views

Security risk in everyday use of an admin account (not root)?

The only thing that distinguishes my admin account from normal accounts is that my admin account is a member of the sudo group and can run sudo. Is it any less secure to use my admin account for ...
8
votes
2answers
3k views

How can I change the default editor of the sudoedit command to be vim?

I'm trying to use sudoedit, but it keeps running the nano editor. My preferred editor is vim. How can I make it the default? Looking at the man page, man sudoedit, I've noticed the following: ...
8
votes
3answers
10k views

Home folder in `root` and not in `home`… I'm confused!

I have an issue with my home folder and this are giving me some permission problems. I've installed an application that tells me that I have no permission to save in /home/username/Desktop, but in ...
8
votes
4answers
24k views

Deleted Myself from Admin Group - Now Getting Error usermod: cannot lock /etc/passwd; try again later [duplicate]

Possible Duplicate: Cannot lock '/etc/group' in recovery mode I have a laptop with Ubuntu 11.10 that is shared between myself and two other family members. My user id was setup as the ...