The account userA can directly issue:-
..... indeed anything you can think of. Yes, it might be logged via syslog, but they can edit the output to cover their tracks. You effectively have userA as a full privilege account. What does userA actually need to do?
If you are nervous of (and should be) giving out commands such as cp, rm, mv, vi, ftp etc. (especially as you can escape to a shell in the latter two) because you can then attack everything, then script up what is allowed and give them access to sudo-execute (not alter) the script meaning that they don't have direct access to the commands.
Give away as little as possible, after all it's you that will have to put it all back together again if they break something (intentionally or in error) if you still have a job. I don't want this to be scary, but would you give a local builder full access to your bank account to and trust them only to withdraw what they are owed?
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)
Hi All,
I got lots of request with sudo, a manager request, verbal command, do this and do that.
The problem with this kind of request is when I added that script and that. It will not be perfect, it's because I can't verify the userid sudo access, I can't reset their password as well, I... (2 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)
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'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)
Linux ubuntu 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
Hi Folks,
Please help me. I am bit struck here.
Here is the OS info.
Linux ubuntu 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
I have a... (17 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)
Install the sudo pkg SFWsudo.tar
bash#tar -xvf SFWsudo.tar
bash#pkgadd -d . SFWsudo
path may be /opt/sfw/bin
Make entry the user name in sudoer file
path of the sudoer file
/opt/sfw/etc/sudoers
check with the below command as a user (not as a root user)
user1$... (1 Reply)
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 have similar issue as mentioned in
167174-how-run-script-using-batch-file.html
It works good, but the control is not coming back to source i tried adding exit to remote script.
Thanks,
Suresh (0 Replies)
Discussion started by: snsuresh
0 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)