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Full Discussion: Automating su ( sudo ) login
Top Forums UNIX for Beginners Questions & Answers Automating su ( sudo ) login Post 302997248 by jim mcnamara on Wednesday 10th of May 2017 08:13:48 AM
Old 05-10-2017
I agree with apmcd47's direction. You can set up ssh keys for the root user. This has some security issues. As you describe it, your ssh configuration probably does not allow root to login directly, which is definitely more secure.

Your described approach with echo is not secure. Period. root passwords do not belong in scripts.

The below stuff is a model, a suggestion. You need to change it. No sudo needed.

If you do not want to undo security consider a different model from your base proposal.
Create a directory off root: /venkidhadha, maybe with 1700 permissions, definitely 700, owned by venkidhadha user. That username (or whatever name you use) has to exist on every remote box.
Leave the directory EMPTY.

Write a simple script executed by the root user's crontab, and have run once a day, or once every hour - whatever:
crontab that runs at 1:00 am once a day:

Code:
0 1 * * * /path/to/runme.shl


Code:
# runme.shl  in another admin directory  must have execute
cd /venkidhadha
find .  -type f user venkidhadha |
while read scriptname
do
    ./${scriptname} > ./${scriptname}.log_$(date "+%d%m%Y")
    chown root:root scriptname
done

The above script needs some tweaking, but you need to keep track of what has been executing, maybe send email, changing the owner to root means you cannot use duplicate script names because this:

Code:
scp $myunique_filename venkidhadha@computername::/venkidhadha

is what you execute to get the script to run as root on the remote side.
 

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LEARN ABOUT SUSE

pmvarrun

pmvarrun(8)							     pam_mount							       pmvarrun(8)

Name
       pmvarrun - updates /var/run/pam_mount/user

Syntax
       pmvarrun -u user [options]

Description
       A  separate  program is needed so that /var/run/pam_mount/user may be created with a pam_mount-specific security context (otherwise SELinux
       policy will conflict with gdm, which also creates file in /var/run).

       pmvarrun is flexible and can run in a number of different security setups:

   root-root
       When pmvarrun is invoked as root, /var/run/pam_mount's permission settings can be as strict as needed; usually (0755,root,root) is  a  good
       pick  as  it  gives  users the debug control over their refcount. Refcount files are given their respective owners (chowned to the user who
       logs in).

   user-user
       When invoked as the user who logs in, /var/run/pam_mount needs appropriate permissions to create a file, which means the write bit must	be
       set. It is also highly suggested to set the sticky bit in this case, so other users do not tamper with your refcount.

   root-user
       Some  programs or login helpers incorrectly call the PAM stack in a way that the login phase is done as root and the logout phase as a nor-
       mal user.  Nevertheless, pmvarrun supports this, and the same permissions as in root-root can be used. While the user may not  be  able	to
       unlink his file from /var/run/pam_mount, it will be truncated to indicate the same state.

Options
       --help, -h
	      Display help.

       --user user, -u user
	      User to handle, must be a valid username.

       --operation number, -o number
	      Increase volume count by number.

       -d     Turn on debugging.

Files
       /var/run/pam_mount/user

Author
       This  manpage  was originally written by Bastian Kleineidam <calvin@debian.org> for the Debian distribution of libpam-mount but may be used
       by others.

       See /usr/share/doc/packages/pam_mount/AUTHORS for the list of original authors of pam_mount.

pam_mount							    2008-10-08							       pmvarrun(8)
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