Install sudo package linux

How To Install sudo on Kali Linux

In this tutorial we learn how to install sudo on Kali Linux.

What is sudo

Sudo is a program designed to allow a sysadmin to give limited root privileges to users and log root activity. The basic philosophy is to give as few privileges as possible but still allow people to get their work done.

This version is built with minimal shared library dependencies, use the sudo-ldap package instead if you need LDAP support for sudoers.

There are three ways to install sudo on Kali Linux . We can use apt-get , apt and aptitude . In the following sections we will describe each method. You can choose one of them.

Install sudo Using apt-get

Update apt database with apt-get using the following command.

After updating apt database, We can install sudo using apt-get by running the following command:

sudo apt-get -y install sudo 

Install sudo Using apt

Update apt database with apt using the following command.

After updating apt database, We can install sudo using apt by running the following command:

Install sudo Using aptitude

If you want to follow this method, you might need to install aptitude first since aptitude is usually not installed by default on Kali Linux. Update apt database with aptitude using the following command.

After updating apt database, We can install sudo using aptitude by running the following command:

sudo aptitude -y install sudo 

How To Uninstall sudo on Kali Linux

To uninstall only the sudo package we can use the following command:

Uninstall sudo And Its Dependencies

To uninstall sudo and its dependencies that are no longer needed by Kali Linux, we can use the command below:

sudo apt-get -y autoremove sudo 

Remove sudo Configurations and Data

To remove sudo configuration and data from Kali Linux we can use the following command:

Remove sudo configuration, data, and all of its dependencies

We can use the following command to remove sudo configurations, data and all of its dependencies, we can use the following command:

sudo apt-get -y autoremove --purge sudo 

References

Summary

In this tutorial we learn how to install sudo using different package management tools like apt, apt-get and aptitude.

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How to install sudo package in Unix? [closed]

So I assume, it is not installed on my server. Could anyone give me instructions on how to properly install the sudo package on my server. I followed this tutorial [http://www.linuxfromscratch.org/blfs/view/svn/postlfs/sudo.html][1]. But I am not able to login as a root and run command make install . My actual problem is: I have phpseclib installed on /usr/share/pear . I want to send some file using phpseclib from one website to another one.(I’ll generate pdf files on website1 and send pdf files to website2) I have a test.php outside of wordpress , it works perfectly (mean by I can see contents of website2 using ssh on website1). But then I have a wordpress page, it has exact same code, it said it failed to open library. I asked on other stackoverflow question and the member said because /usr/share/pear only allow root to access. As a wordpress user, I don’t have a privilege. So that is why am I here and was trying to gain root access.

Wrong question: you have sudo installed, but it’s not configured to do anything useful. Sudo is a common way of executing commands as root, but not the only one. You need another way to gain root (if only because that’s necessary if you want to set up sudo). What distribution is this?

As @Gilles said, you have sudo installed, but you need root access to modify the /etc/sudoers file to grant permission to your userid to run the mount command.

What are the other ways to gain access to root? What is distribution? Sorry I am not familiar with it. I just have web server and web site running on wordpress. I installed phpseclib on /usr/share/pear. But my wordpress page cannot access since it said only root can access it. I have test.php outside of worpress, it can access my phpseclib just fine.

@user2090076 a few examples of distributions: Ubuntu, Debian, Red Hat (aka RHEL), CentOS, OpenSUSE. the list goes on. if you really don’t know, run lsb_release (it it’s available) or cat /etc/*-release , which should give you a hint.

Please post the output of lsb_release -ic , that should tell us what system you are running, if the command does not exist, that will also narrow things down.

1 Answer 1

When you have an account on a unix system, there are two main ways to gain administrative privileges:

• with su , which requires knowing the password to the root account;
• with sudo , which requires having prior authorization and typing your account’s password.

Many variations are possible (other tools, other authentication methods), but if you haven’t configured anything special, one of these is likely to work. Depending on the distribution, su or sudo may be the default way.

If you’re using the command line, you can type:

• su -c ‘somecommand’ or sudo somecommand to execute a command as root;
• su or sudo -s to execute a shell as root;
• su — or sudo -i to execute a shell as root, with root’s initialization files.

GUI environments have ways to run commands as root by invoking su or sudo under the hood and prompting the user for a password in a dialog box.

If sudo tells you “no valid sudoers sources found”, it means that the sudo program is installed, but not configured. You won’t be able to use it until you’ve configured it, and you need root access for that. Always run the visudo command to set up sudo , never try to edit its configuration file directly. Before running visudo , make sure that you’ve configured your default editor — check that the value of the VISUAL environment variable is something you’re comfortable with (if unset, it may default to vi), e.g. export VISUAL=nano .

To gain root access, run su and type the root password. It is rare for su to be disabled. Many systems make su to root inoperative indirectly, by not having a root password.

Since sudo isn’t set up, it’s highly likely that su is. If it isn’t, this is an unusual set up; check your hosting provider’s documentation or contact their support.

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How to install sudo on Debian or Ubuntu Linux

The command sudo, we used before other program calls to execute them. The key purpose of it is to authorize the users to run the program on behalf of and with the rights of another user to perform tasks that are reserved for administrators.

When we run the command with sudo, it asks for the password of the current user before executing the program. This checks whether the user that entered the command is the group of authorized users defined in the /etc/sudoers file or not. The target user is root assumed by default.

Under Debian, in /etc/sudoers all members of the group are sudo and allowed by default to become the user root and thus to receive root rights. The user or users created during installation belong to the group sudo by default.

In GUI desktop environments such as GNOME or KDE, root rights are sometimes automatically requested for a certain program for certain tasks by giving a graphical dialogue box. For example, you are automatically asked for your password for a program installation or upgrading system graphically, so that APT receives root rights and can install the program. In many cases, sudo no longer needs to be called manually.

Easy way to understand what sudo is for-

Command to Install sudo on Debian Linux Minimal server

Well, sudo is already in the Debian system most of the time; however, in minimal Debian installation such as Debian on Docker, the sudo will be missing. Hence, to create any other user and use that to install some software without giving root access for all the commands, we have to install sudo manually using the command line. Here are the steps to follow.

This article assumes that you already have root user access because without that we cannot install “sudo” or any other packages.

1. Apt update cache

First, run the system update command to refresh the APT repositories cache. This is necessary because many times after installing a fresh minimal Debian or Ubuntu Linux, it won’t recognize any packages to install. It is because there is no list of packages in the cache, that the system can identify to install.

2. Command to install sudo on Debian or Ubuntu server

You have the updated minimal Debian or Ubuntu server, now we can easily use the APT package manager command to install the “sudo” without the help of any additional repository as it is already available in the base repo of Debian.

3. Create a new user

Once the sudo is installed, let’s create a new user to use later with the sudo command.

adduser your-new-user

Change “your-new-user” with whatever name you want to give to your user.

For example, here we area adding a user called – h2smedia, the command will be like this:

Set password when it asks.

4. Add a new user to the sudo group in Debian

This is an important step otherwise you won’t be able to use your new user with sudo rights to install new programs.

usermod -aG sudo h2smedia

Again replace h2smedia with your user created above.

5. Switch to new user

Now, let’s switch to the newly created user from root to run a non-root user but with sudo rights.

su your-new-user

Run sudo commands, to test it:

Enter the password you have created for your user.

Now to log back again to the root user, you can simply type:

In this way, anybody who has the root user rights can install and add a new user with sudo rights. However, make sure you are using a strong password.

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2 thoughts on “How to install sudo on Debian or Ubuntu Linux”

I have Ubuntu 18.04 but cannot do the following install:
/home/fred/Downloads/hotspot shield)f=hotspotshield_1.0.7_amd64.deb /home/fred/Downloads/hotspot shield)sudo apt install ./$f
Reading package lists… Done
Building dependency tree
Reading state information… Done
Note, selecting ‘hotspotshield:amd64’ instead of ‘./hotspotshield_1.0.7_amd64.deb’
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation: The following packages have unmet dependencies:
hotspotshield:amd64 : Depends: libdbus-1-3:amd64 (>= 1.10) but it is not installable
Depends: libnl-3-200:amd64 (>= 3.2.0) but it is not installable
Depends: libnl-route-3-200:amd64 (>= 3.2.0) but it is not installable
Depends: network-manager:amd64 (>= 1.10) but it is not installable
E: Unable to correct problems, you have held broken packages. How can I fix this? Reply

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