hi.
I need a bash script which can login to an other mashin via SSH and then run some commands and then return the result to my mashine.
I dont know where to begin, I think first I will need a ssh connection, dont know how to make it,
then , do I need a ftp connection between the 2 mashins to... (5 Replies)
Ok, there's been a good number of posts about this, but here goes. I want a script to log in to a system via ssh without using keys.
This will be used to log in to Cisco IOS devices.
I have tried the following, but could not get it to work:
SSH login expect shell script to supply username and... (1 Reply)
Hi, I was wondering how to change the prompt for my ssh login. At the moment it is like
user>
while I'd like it to be as
user@host>
It is in the .bash_profile or .ssh ??? Thanks (2 Replies)
I've struggled to find a solution to this problem from searching so I thought I'd write a post to see what can be done.
I'm attempting to connect and run commands on 'server2' but because of security limitations I cannot access it directly. I can however ssh into 'server1' and then into... (7 Replies)
Hey Guys,
I want to have a bash script on my computer (Mac OS X 10.6.8) that can ssh into my iPod and respring. I know how do this by typing in "ssh root@10.0.1.10" and then typing in the password "alpine". From there i simply type "respring". I want to possibly put this into a shell script so it... (0 Replies)
This is the entry when I tail /var/log/secure when I ssh for user "nightly"...
Aug 4 03:19:48 itanium2 sshd: Illegal user nightly from ::ffff:10.91.220.35
Aug 4 03:20:10 itanium2 sshd: Failed password for illegal user nightly from ::ffff:10.91.220.35 port 32862 ssh2
What could be... (3 Replies)
Hi,
We have a requirement to do passwordless entry from one user to a different user on the same AIX server using ssh keys.
Can some one help me with this?
Thanks in advance,
Panditt (3 Replies)
Hi @ all
I have the following scenario:
As Admin of a cupple of servers I tried to write the following script to figure out, if the machine is up and available and if some directory´s were available. But my script is having some probs, while running. Maybe some of you have a better way to... (9 Replies)
HI
I have the following requirement
I have a script a.sh which will deploy files in multiple servers .The argument for the a.sh is abc.gz host1.conf
where abc.gz is a zip file and one.conf will contain all the database connection string .
Now I have to write a b.sh which will... (7 Replies)
Hi Everyone,
I started looking at the possibility of making some of our bash scripts available through a web server using CGI and the simple ones works just fine. Now I need to execute remote commands using ssh but can't really get it to work. I got private keys all sorted. Must be ssh... (1 Reply)
Discussion started by: arizah
1 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)