visudo edits the sudoers file in a safe fashion

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105
votes
12answers
135k views

How to modify a invalid /etc/sudoers file? It throws out an error and not allowing me to edit again

How do I edit an invalid visudo file? Here is what happens: $ sudo visudo >>> /etc/sudoers: syntax error near line 28 <<< sudo: parse error in /etc/sudoers near line 28 sudo: no ...
39
votes
3answers
6k views

What are the differences between sudo, su, visudo, chroot, and gksu?

What are the differences between sudo, su, visudo, chroot, and gksu ?
9
votes
1answer
1k views

Change the default editor when sudo visudo

When doing sudo visudo, the default editor is nano. I want to change it to vi or vim. I already made vim be the default application to replace gedit upon opening php, plain text, c and h files, by ...
7
votes
1answer
400 views

How disable mysql command in sudoers file?

How can I disable /usr/bin/mysql command in sudoers file? I've tried to use it this way: %tailonly ALL=!/usr/bin/mysql But when I access user 'tailonly' of group 'tailonly', this command is still ...
5
votes
2answers
6k views

How to change visudo editor from nano to vim? [duplicate]

When I use visudo, it always opens it with nano editor. How to change the editor to vim?
3
votes
2answers
235 views

Certain commands not working for a user with sudo after adding to `sudoers` file

I cannot seem to allow the user (In this case Ruby) to run sudo rm -rf, sudo rmdir, or sudo mkdir. I have tried it with other commands and it works fine allowing that user to run sudo apt-get update ...
3
votes
1answer
1k views

sudo: can't open /etc/sudoers: Permission denied [duplicate]

sudo from a standard user works fine, but when I try to use it from root it returns this error: sudo: can't open /etc/sudoers: Permission denied sudo: no valid sudoers sources found, quitting ...
3
votes
1answer
40 views

Must use 'visudo'?

In /etc/sudoers, it is said "This file MUST be edited with the 'visudo' command as root." My question is why must this file be edited with 'visudo'. It seems I was able to edit the file successfully ...
2
votes
3answers
944 views

Run a specific sudo command without a password in Ubuntu 13.10

I would like to run vagrant without being prompted for a password. As this post suggests, I used visudo to add the following line to my sudoers file. john-moz ALL=(ALL) NOPASSWD: /usr/bin/vagrant ...
2
votes
0answers
71 views

Reset sudoers file

I want to add a new user to run all commands without a password, so I went to edit /etc/sudoers (using visudo of course) by adding the line myuser ALL=NOPASSWD: ALL. Everything is OK, but 15 minutes ...
2
votes
1answer
340 views

Is there a GUI to `visudo`?

Quite simply, is there a GUI to visudo I can recommend to other users, and use for myself? I have to set up a system where over 50 users have different sudo privileges and I need to juggle them all.
1
vote
3answers
107 views

Do I have to do a new installation?

I was in the /etc/sudoers and might done something wrong, beacuse after I couldn´t use the commandline again. Maybe i deleted sudo in /etc/sudoers. It said something was wrong i line 28. What can I do ...
1
vote
1answer
31 views

Explanation of visudo lock file

When I edit /etc/sudoers using visudo, I think it saves to sudoers.tmp, checks it for errors, then copies it to the real /etc/sudoers. However, I can't confirm my theory (how the lock file is used) ...
1
vote
1answer
61 views

Upstart for docker and setuid permissions

OK, this has kept me busy for a day at least, since last night. I am trying to do something very simple: run a bash script which creates a few folders and runs a docker container - but using upstart. ...
1
vote
2answers
337 views

Auto-starting a GUI application that requires sudo

Question: I need to auto-start a GUI application that requires sudo. I know I need to edit the sudoers file with: sudo visudo However, I don't know what to write in the file. What I already ...
1
vote
1answer
111 views

/etc/sudoers file problem understanding

According to the documentation, modifications of this file may enables local users to execute sudo commands on remote machines: user1 192.168.1.14=(user2:group1) ALL According to what I read, ...
1
vote
1answer
271 views

Changes to sudoers have no effect. Following basic Ubuntu tutorial

I'm following along the Ubuntu sudoers tutorial. Here's my exact /etc/sudoers file (screenshot instead of code block because the formatting was getting messed up). Notice the lines at the bottom ...
1
vote
1answer
2k views

Mount samba share at login using startup script (not fstab)

Background I'm trying to automatically execute a command that mounts a password protected Samba share when my user logs in. The catch is, I share my laptop with another user, and I don't want the ...
1
vote
2answers
993 views

Xubuntu visudo sudoers edit not working

I have been trying to specify a script that I would like to run without being prompted for a password. After a number of google and stack searches and a number of different syntax changes, I still ...
1
vote
1answer
54 views

Changed suoders to an account that doesn't exist, what should I do

I've installed ubuntu 12.04 with single user, let's call him user1. I then created a new user, let's call him user2. I wanted user2 to be the only user with sudo rights, so I removed all users from ...
1
vote
0answers
18 views

timestamp_timeout in Ubuntu doesn't work

I use ubuntu 14.04 and I tried to change sudo password timeout but change made to it doesn't work. Please help , My visudo file looks like this. GNU nano 2.2.6 File: ...
1
vote
1answer
251 views

visudo: specified editor (./sudo_editor) doesn't exist

I tried to run the "sudo EDITOR=./sudo_editor visudo -f /etc/sudoers.d/relax_requirements" command and the error came out as: visudo: specified editor (./sudo_editor) doesn't exist Anyone know what ...
1
vote
0answers
42 views

Lost visudo - I seem to have lost visudo, to my great surprise

Lost visudo I seem to have lost visudo, to my great surprise. I'm trying to add to /etc/sudoers or /etc/sudoers.d but when I try and run visudo as root I get this sudo: visudo: command not found ...
0
votes
1answer
122 views

visudo crashing on making changes

I am attempting to add an entry to visudo: admin ALL=(ALL) /bin/kill I have attempted to make changes to this in the past but crashed the visudo file. Can someone assist in telling me where ...
0
votes
0answers
100 views

Sorry, user is not allowed to execute X as root on lt

Whenever I try to run a command from the termainal as sudo, I am now getting the error: Sorry, user {user} is not allowed to execute {command} as root on lt. lt is the name of my computer. The only ...
0
votes
1answer
92 views

Allow nopasswd sudo for specific user

I am trying to set the scp as a specific user with NOPASSWD. alice ALL = (bob:ALL) NOPASSWD: /usr/bin/scp As I did understand from this question. However when I save using my visudo I still can't ...
0
votes
0answers
169 views

When running a shell script using sudo I am getting no tty present and no askpass program specified

I am trying to build a project using jenkins. The project is based on node. I wrote a shell script that has only npm install command. I am running the shell script from jenkins as sh ...
0
votes
1answer
801 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. ...
0
votes
1answer
114 views

Shutdown launcher withouth password

I added new launcher to panel using this command for shutdown: gksu telinit 0 When I wanted to get rid of constant inserting of password, I did not succeed. I opened visudo and added line "username" ...
0
votes
1answer
63 views

Visudo not working for specified files

I am trying to give sudo ability without the need of passwords to specific files. So far I have: employee ALL=(ALL:ALL) NOPASSWD: /home/file_name The file has a simple chmod command, in the bash ...
-2
votes
0answers
21 views

Running .command file without the request for a password [closed]

So I'm actually running OS X Yosemite, but I figure, it's a unix-like OS, so... I stumbled upon this answer here But it's complete, and utter bollocks, in no way helps. First off, where the heck is ...
-3
votes
1answer
134 views

How can I edit the sudoers file since visudo command doesn't work properly [duplicate]

i tried to edit the etc/sudoers ,while trying to add myself to the sudoers file,but I'm unable to edit it. As I entered the command visudo the following came as output $ visudo visudo: ...
-6
votes
1answer
2k views

How to sudo visudo without a password, remove all prompts for password [closed]

Websites tell me to use sudo when I have no password, usually tell me one of two things. It is bad security Or use 'sudo visudo' and the %admin ALL=(ALL) NOPASSWD: ALL line I would like to not ...