I have setup password less login to sudo for a particular group. if I do sudo /usr/local/sbin/group it will take me to the group without password. Recently i executed a command scl_source as source scl_source enable devtoolset-7. After that my sudo is asking password not sure why
I just need to know what should be done on a login user so that no one can access it except through sudo
i.e.
telnet server
login: user
NO ACCESS
telnet server
login: mylogin
sudo - user <any command>
ACCESS GRANTED
thanks (0 Replies)
I have installed sudo on AIX 6100-04 and want to know how do I set it up for a user to be able to run only some commands? I want to give the user the rights to only cd to certain directories and run the ls command to name a few? Are there any issues with running sudo when the user is forced to... (2 Replies)
I've run into an issue running rsync remotely via SSH/sudo ...
I get the error sudo: sorry, you must have a tty to run sudo
I know that I can disable the tty in sudoers file ( !requiretty),
but my question is: is there a security risk by disabling requiretty with SSH/rsync/sudo?
Is... (0 Replies)
Hello All,
I want to create a script that will do ONLY su to any user on the server with hpadmin login using sudo. Can anyone let me know how can it do it.
Regards
Ankit (1 Reply)
I am writing a BASH script to update a webserver and then restart Apache. It looks basically like this:
#!/bin/bash
rsync /path/on/local/machine/ foo.com:path/on/remote/machine/
ssh foo.com sudo /etc/init.d/apache2 reloadrsync and ssh don't prompt for a password, because I have DSA encryption... (9 Replies)
I'm actually working with a Ubuntu-System here and have a question about executing a command with 'sudo'.
I tried and got a error message like "not allowed".
After this I logged in with 'sudo -s' and typed the command without 'sudo'. This worked well.
Can please somebody explain me this... (0 Replies)
I want to give root access to a user called denielr on server - tsprd01, but do not want to share root password. I have sudoers configured already.
He should have all access equal to root. I made this entry in /etc/sudoers, but it is not working
denielr tsprd01 =(root) NOPASSWD: ALL
I tried to... (2 Replies)
Hello everyone,
Can anyone help me please. I want to disable SSH direct access for an AIX user.
For example, if I have USER1 and USER2. I want to disactivate direct access for USER2. The user must enter his login (USER1) and his password and then he can do su - USER2 .
Thanks, (3 Replies)
Hi,
I have given access to user mwadmin in shudders file as :
mwadmin ALL:NOPASSWD:/www/* /usr/* /opt/*
However, not able to execute below command:
sudo mkdir -p /usr/test
password for mwadmin:
Sorry, user mwadmin is not allowed to execute '/bin/mkdir -p /usr/test' as root.
... (4 Replies)
I had a question on users inheriting SUDO capabilities of another account. Let's say that there are three users A, B, and C. A has access to Sudo into B. B has access to Sudo into C. Does this give A access to sudo into B and then sudo into C.
A -> B
B -> C
A -> B -> C ?
Another example. My... (2 Replies)
Discussion started by: sbcopty
2 Replies
LEARN ABOUT LINUX
sudo_root
sudo_root(8) System Manager's Manual sudo_root(8)NAME
sudo_root - How to run administrative commands
SYNOPSIS
sudo command
sudo -i
INTRODUCTION
By default, the password for the user "root" (the system administrator) is locked. This means you cannot login as root or use su. Instead,
the installer will set up sudo to allow the user that is created during install to run all administrative commands.
This means that in the terminal you can use sudo for commands that require root privileges. All programs in the menu will use a graphical
sudo to prompt for a password. When sudo asks for a password, it needs your password, this means that a root password is not needed.
To run a command which requires root privileges in a terminal, simply prepend sudo in front of it. To get an interactive root shell, use
sudo -i.
ALLOWING OTHER USERS TO RUN SUDO
By default, only the user who installed the system is permitted to run sudo. To add more administrators, i. e. users who can run sudo, you
have to add these users to the group 'admin' by doing one of the following steps:
* In a shell, do
sudo adduser username admin
* Use the graphical "Users & Groups" program in the "System settings" menu to add the new user to the admin group.
BENEFITS OF USING SUDO
The benefits of leaving root disabled by default include the following:
* Users do not have to remember an extra password, which they are likely to forget.
* The installer is able to ask fewer questions.
* It avoids the "I can do anything" interactive login by default - you will be prompted for a password before major changes can happen,
which should make you think about the consequences of what you are doing.
* Sudo adds a log entry of the command(s) run (in /var/log/auth.log).
* Every attacker trying to brute-force their way into your box will know it has an account named root and will try that first. What they do
not know is what the usernames of your other users are.
* Allows easy transfer for admin rights, in a short term or long term period, by adding and removing users from the admin group, while not
compromising the root account.
* sudo can be set up with a much more fine-grained security policy.
* On systems with more than one administrator using sudo avoids sharing a password amongst them.
DOWNSIDES OF USING SUDO
Although for desktops the benefits of using sudo are great, there are possible issues which need to be noted:
* Redirecting the output of commands run with sudo can be confusing at first. For instance consider
sudo ls > /root/somefile
will not work since it is the shell that tries to write to that file. You can use
ls | sudo tee /root/somefile
to get the behaviour you want.
* In a lot of office environments the ONLY local user on a system is root. All other users are imported using NSS techniques such as
nss-ldap. To setup a workstation, or fix it, in the case of a network failure where nss-ldap is broken, root is required. This tends to
leave the system unusable. An extra local user, or an enabled root password is needed here.
GOING BACK TO A TRADITIONAL ROOT ACCOUNT
This is not recommended!
To enable the root account (i.e. set a password) use:
sudo passwd root
Afterwards, edit the sudo configuration with sudo visudo and comment out the line
%admin ALL=(ALL) ALL
to disable sudo access to members of the admin group.
SEE ALSO sudo(8), https://wiki.ubuntu.com/RootSudo
February 8, 2006 sudo_root(8)