Sudo requires that you type your own password. The purpose is to limit the damage if you leave your keyboard unattended and unlocked, and also to ensure that you really wish to run that command and it wasn't e. It is often configured to not ask again for a few minutes so you can run several sudo commands in succession.
If you need to run several commands as root, prefix each of them with sudo. Sometimes, it is more convenient to run an interactive shell as root. You can use sudo -i for that:. Instead of sudo -iyou can use sudo -s. The difference is that -i re i nitializes the environment to sane defaults, whereas -s uses your configuration files for better or for worse.
For more information, see the sudo websiteor type man sudo on your system. Sudo is very configurable; for example it can be configured to let a certain user only execute certain commands as root. Read the sudoers man page for more information; use sudo visudo to edit the sudoers file.
The su command exists on most unix-like systems.
It lets you run a command as another user, provided you know that user's password. When run with no user specified, su will default to the root account. The command to run must be passed using the -c option. Note that you need quotes so that the command is not parsed by your shell, but passed intact to the root shell that su runs. On some systems, you need to be in group number 0 called wheel to use su. The point is to limit the damage if the root password is accidentally leaked to someone.
If there is a root password set and you are in possession of it, you can simply type root at the login prompt and enter the root password. Be very careful, and avoid running complex applications as root as they might do something you didn't intend. Logging in directly as root is mainly useful in emergency situations, such as disk failures or when you've locked yourself out of your account. Single user mode, or run-level 1, also gives you root privileges.
This is intended primarily for emergency maintenance situations where booting into a multi-user run-level is not possible. You can boot into single user mode by passing single or emergency on the kernel command line.Introduction — Linux follows the very tough permission model.
A root user can do anything but normal user has no permissions.
Sudo nopasswd: How to run commands as root without a password?
To run any command, they need to ask for permissions from the superuser. In corporate world this is very dangerous because all the privileges of root are granted to any user, who can do anything. For Example —. To overcome above mentioned risk, sudo command comes in trend. You should not edit this file directly with normal editor, always use visudo for safety and security.
It also checks the syntax of edits and provide basic sanity checks which are very helpful. Syntax of pre-defined rule is given below —. ALL means, the user can run all commands on all hosts, as all users and groups. So, root has all the privileges to run any command as any user or group. User can check wether the command is working or not.
Then follow the below procedure to check —. Assign privileges to a group — You can asign similar privileges to multiple users just by making a group them. There is one predefined group is in sudoers file. Members of this group can use sudo to run any commands as any user, including superuser.
We can add users to this group. It is normally configured like —. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.
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Run commands as root with sudo
My problem is I want to execute this program as super-user, but I don't want to use sudo to run it. I just want to run with ". It can appear easy, but I have searched a lot and I don't know what to do. Yes it is possible. However, the error "operation not permitted" is indicative of the file itself not having executable privileges.
It appears you are already in the directory with the file, if not cd into the directory first and then run the following before you try to run the file again.
If you need root privileges, You will see "permission denied" instead of "operation not permitted". The output of ls -l will show the file permissions for the files in the current directory and an x at the end of the permissions indicates the file is executable.
Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. Run program as root without using sudo Ask Question.
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Asked 6 years, 3 months ago. Active 6 years, 3 months ago. Viewed 3k times. Best regards. John Scott 1, 5 5 gold badges 22 22 silver badges 48 48 bronze badges. Jefferson Dias Jefferson Dias 13 1 1 silver badge 3 3 bronze badges. Can you post the output of ls -l. It's easier to answer if you explain why you don't want to use sudo.
Is it because you don't want to enter the password, or some other reason? Active Oldest Votes. Please post any errors. I think that NvidiaTvOut. You can change it's permission as it's executable. This won't run it as a super-user though. Sign up or log in Sign up using Google.
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It only takes a minute to sign up. It is rarely a good idea to have sudo inside scripts. Instead, remove the sudo from the script and run the script itself with sudo :. That way, all commands within the script will be run with root privileges and you only need to give the password once when launching the script.
If you need a particular command within the script to be run without sudo privileges, you can run it as a regular user with thanks Lie Ryan :.
The space is irrelevant, it should not affect anything, there is always a space between a command and its arguments. Add an entry for your username and the script that you would like to run without being asked for a password. This is not the most secure thing to do since you are writing a sudoer password in plain text. To make it a little more secure you can create a variable and read the sudo password into the variable and then you could execute the command as:.
Also, if you do not mind all your commands being executed as root you can simple execute your script using sudoas previously suggested. This answer is similar to terdon's answer. I would also suggest running the main script with sudo so the script can run without having to ask for the user's password during its execution. There is actually a much simpler way to do this. For portability, this is my implementation but feel free to manipulate it to suit your need.
Enter your sudo password as a parameter when starting the script, capture it, and echo it with each command which will prompt for the sudo password.
But if someone else monitors what's run on the node; has access to logs created by it; or is just looking over your should randomly when you run a test, that could compromise security. The echo is in response to a prompt, so you can use anything you need to, there, if you're running other scripts that have prompts for progress, in sequential order.
Make sure you know that order, though, or bad things can happen. Ubuntu Community Ask! Sign up to join this community. The best answers are voted up and rise to the top. How do I run a 'sudo' command inside a script? Ask Question. Asked 6 years, 7 months ago. Active 1 year, 1 month ago. Viewed k times. To do a patch manually I must type this command sudo.
There are also several other commands but this one is giving trouble. Just put it in the script, what's the problem?By default, Linux restricts access to certain parts of the system preventing sensitive files from being compromised. The sudo command temporarily elevates privileges allowing users to complete sensitive tasks without logging in as the root user. In this tutorial, learn how to use the sudo command in Linux with examples.
To make it work, use sudo before a restricted command. The system will prompt for your password. Once provided, the system runs the command. When the sudo command is used, a timestamp is entered in the system logs. The user can run commands with elevated privileges for a short time default 15 minutes. Note: Staying logged in as an administrator compromises security. In the past, admins would use su substitute user to temporarily switch to an administrator account.
For most modern Linux distributions, a user must be in the sudosudoers, or wheel group to use the sudo command. By default, a single-user system grants sudo privileges to its user. A system or server with multiple user accounts may exclude some users from sudo privileges. We recommend to only grant privileges that are absolutely necessary for the user to perform daily tasks.
Add a user to the wheel group with the following command:. Replace [username] with an actual username. You may need to log in as an administrator or use the su command. Add a user to the sudo group with the following command:. In some modern versions of Linux, users are added to the sudoers file to grant privileges. This is done using the visudo command. To add a user and grant full sudo privilegesadd the following line:.
The visudo application prevents glitches, bugs, and misconfigurations that could break your operating system.
You should see an error message. You do not have the necessary permissions to run the command. Type your password when prompted. The system executes the command and updates the repositories. This command switches your command prompt to the BASH shell as a root user:.
The hostname value will be the network name of this system. The username will be the current logged-in username. The Linux command line keeps a record of previously executed commands.
These records can be accessed by pressing the up arrow. To repeat the last command with elevated privileges, use:. This example repeats the 6th entry in history with the sudo command. Adding a string of text to a file is often used to add the name of a software repository to the sources file, without opening the file for editing.
Use the following syntax:.How to grant terminal root without typing sudo su every time in Kali ✔️
SecuritySysAdmin. This guide will walk you through the steps to create or add a sudo user on CentOS 7. Read More. The sudo command is the preferred means to handle elevated permissions.This article is a brief overview of what Sudo nopasswd is and how to run commands on Linux as a sudo user without having to enter your password every time. Sudo superuser do command in Linux lets a user run a command as the root by entering your password.
However, if you are the only person using the system and require to run commands as the root user, again and again, entering the password every time could get a bit tedious. In this tutorial we will see how we can run commands as the root user without having to type in the password. A word of caution, be careful who you grant this power to cause as they say, with power comes responsibility.
The way to do this is really simple. First, we need to edit the suoders file. In my case, the default is set to nano editor:. To grant the permission to run commands as root users without the need of entering the password, add the following line at the end. After making the change, exit and save the changes.
I need to run something as sudo without a password, so I used visudo and added this to my sudoers file:. Why does it ask for a password? Therefore, if you can execute any command with a password prompt, and you want to be able to execute a particular command without a password prompt, you need the exception last. Note the use of rootto allow the program to be run as root but not as other users.
Don't give more permissions than the minimum required unless you've thought out the implications. Note for readers who aren't running Ubuntu or who have changed the default sudo configuration Ubuntu's sudo is ok by default : Running shell scripts with elevated privileges is risky, you need to start from a clean environment once the shell has started, it's too late see Allow setuid on shell scriptsso you need sudo to take care of that.
Complete Solution: The following steps will help you achieve the desired output:. Add some commands that only a root or sudo user can execute like creating a folder at the root directory level:. Save and exit using :wq!
Replace ahmad with whatever your username is. Also make sure this is the last line. Save and exit. The ONLY way to see it is under root privilegies, you cannot list this directory without it, this file is Manjaro specific, you may found this configuration with other name, but in same directory. Edit: Based on your comment to another answer, you want to run this from an icon.
You will need to create a. You should probably consider the idea that you shouldn't be running things as root and that changing the system farther down the road so that you don't need root permissions at all would be a better way to go.
Also something I doubted about clarifying for future readers : You need to run your script as sudo. Type sudo when calling the script.