I want to know if i can somehow or someway run a remote linux script stored in windows machine through putty which can contain:
#!/bin/bash
su
<password>
<some operation which needs root permissions>
exit
<some operation with normal user credentials>
Since i tried above script but it does ask root password and then give error of not able to run commands and needed root access. I ran this script from putty using command line:
putty -ssh normaluser#linuxhost -pw <password> -t -m C:\myRootScript.sh
Thanks for answers
Ashutosh
Either login as the root user (not recommended!) or add the user that you're login in with to the sudoers file
sudo visudo
myusername ALL=(ALL) NOPASSWD: ALL
That will let you run sudo without a password.
Related
I am trying to copy files/directories from one user to another user in a same machine via jenkins.
Suppose there is one file abc.txt in a directory(say /tmp/dist) where user1 has sudo access. I need to copy that file to the directory of (/opt/user2/temp) via jenkins.
I executed these commands in interactive shells after logging in to the server.
sudo -u user2 -s cp /tmp/dist/* /opt/user2/temp
This asks for password prompt and abruptly comes out of terminal and terminates the job.
I also checked if i can remove password prompt by adding password details in /etc/sudoers but to no avail.
sudo visudo
I also tried scp to the destination folder directly but that also was not fruitful.
Tried ssh as well
ssh -t user2#hostname 'sudo -u user2 -s cp /tmp/dist/* user2#hostname:/opt/user2/temp'
edit 1:
Tried changing the owner of the group to the destination folder but it asks for password prompt again.
sudo chown -R user2 /tmp/dist
I expect directory copy from to another folder provided it doesnt asks for password prompt.
Also,I don t have access or can modify /etc/sudoers.
I'm currently writing a .sh script to deploy different applications on 4 different machines. Right now I'm having trouble with running a script as another user. I need to log in with myUser with my credentials and then sudo su to user2 to run a specific script.
Normally, I would manually do the following:
ssh myUser#remotehost
[Type in password]
sudo su - user2
cd /path/only/accessible/to/user2
./someScript.sh
when I tried
ssh -t myUser#$remotehost "sudo su - user2 && /path/only/accessible/to/user2 && ./someScript.sh"
I was asked my password, then stayed logged as user2, without any feedback from the script, which would normally give me some informations.
What am I doing wrong?
Try
ssh -t myUser#$remotehost "sudo -u user2 /path/only/accessible/to/user2/someScript.sh"
If you need shell access after that you can use
ssh -t myUser#$remotehost "sudo -u user2 /path/only/accessible/to/user2/someScript.sh && /bin/bash -l"
An update if anyone wonders about this.
What I finally did was to log in with an ssh key. My sysadmin had to get involved in order to set it up, but at least it is a viable option.
ssh -i /path/to/sshKey user2#$remoteHost "/path/only/accessible/to/user2/someScript.sh"
i am doing automation the process by bat file.
putty.exe -ssh bhavepatel#10.10.178.140 -pw Winter34! -m C:\Users\BHAVEPATEL\Desktop\tel\tel.txt -t
In tel.txt file , i want to change the directory ans switch the user.Please see below code in tel.txt file
cd /apps/denodo/bin
sudo -su denodo bash; /bin/bash
Putty prompt with pwd when i swith the user to denodo. How can i pass the password input to bat file?
You cannot. Not in an interactive session.
See How to pass the password to su/sudo/ssh without overriding the TTY?
All you can do is to configure sudo not to ask for a password at all. That's the only legitimate approach. To admin that you are actually logging in without typing a password. Instead of secretly automating password typing.
See How to avoid prompt password for sudo?
I am trying to create a Linux terminal menu by way of a simple script. Within the script it will have some commands that will submit a job (a shell script for example) as another user without password prompt.
I was able to find the following post and this worked. how to run script as another user without password
However, there was one side affect. It appears the user can run other scripts in that users folder which I don't want.
Any suggestions/help welcome.
For the sake of this. Here is what I have:
Username temp1, which is the user that will be running the menu.
uid=1001(temp1), gid=1001(temp1), groups=1001(temp1)
Username wayne, which is the user that the script must be submitted as to run the job
uid=1000(wayne), gid=1000(wayne),groups=1000(wayne),4(adm),24(cdrom),27(sudo),30(dip)...
Script script1.sh, script2.sh owned by wayne.
-rwxr-xr-x script1.sh
-rwxr-xr-x script2.sh
If I try to go to /home/wayne as temp1 user I get permission denied (expected)
I set the scripts to chmod 700 for wayne. So technically no one can run them other than wayne.
I have edited sudo file and have the following entry:
temp1 ALL(wayne) NOPASSWD: /home/wayne/script1.sh
When I run command su -c "/home/wayne/script1.sh" -s /bin/sh wayne the script runs (as expected)
When I run command su -c "/home/wayne/script2.sh" -s /bin/sh wayne the script runs (not expected).
Any ideas?
The answer is change from su to sudo.
su is primarily for switching users, while sudo is for executing commands as other users. The -u flag lets you specify which user to execute the command as:
sudo -u wayne '/home/wayne/script2.sh'
gives Sorry user is not allowed to execute
Solution: In order to run commands/scripts as another user on linux/unix you need sudo permission and run the following formula:
sudo -H -u <user> bash -c '<some-command>'
For example:
sudo -H -u wayne bash -c 'echo "user:$USER|home:$HOME|action:run_script"; ./home/wayne/script.sh'
from Documentation:
sudo allows a permitted user to execute a command as the superuser or
another user, as specified by the security policy.
-H The -H (HOME) option requests that the security policy set
the HOME environment variable to the home directory of the
target user (root by default) as specified by the password
database. Depending on the policy, this may be the default
behavior.
-u user The -u (user) option causes sudo to run the specified
command as a user other than root. To specify a uid
instead of a user name, use #uid. When running commands as
a uid, many shells require that the '#' be escaped with a
backslash ('\'). Security policies may restrict uids to
those listed in the password database. The sudoers policy
allows uids that are not in the password database as long
as the targetpw option is not set. Other security policies
may not support this.
Using 'Execute shell script on remote host using ssh' option and need sudo rights on remote server to change permissions and remove protected files.
How to run session with this rights?
Getting message
sudo: sorry, you must have a tty to run sudo
when trying to run sudo command.
To run sudo remotely you have 2 options
Allow the user to run sudo commands without a password.
Append username ALL=(ALL) NOPASSWD: ALL the /etc/sudoers file with sudo visudo. Alternatively you can modify this line to only allow certain sudo commands to be run without a password
Use the pseudo-tty to emulate tty remotely and enter your sudo password when requsted.
To do this run ssh -t username#host command_to_execute
If the remote server accepts the direct login of the root user you can simply do:
ssh -l root yourserver command_to_execute
Similar syntax is:
ssh root#yourserver command_to_execute
Mind that allowing the login of the root user via ssh to a remote server isn't always a good solution.
A better solution would be change the owner / permissions to allow a non-root user to modify the protected files.