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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 OSF1

netrc

netrc(4)						     Kernel Interfaces Manual							  netrc(4)

NAME

       netrc, .netrc - Specifies automatic login information for ftp

SYNOPSIS

       $HOME/.netrc

DESCRIPTION

       The  .netrc  file contains the information used by the automatic login (autologin) feature of the ftp command.  It is a hidden file in your
       home directory and must be owned by the user logging in, or by the root user.   If the .netrc file contains a login  password,  the  file's
       permissions must be set to 600 (read and write by owner only).

       The  .netrc file can contain the following entries (separated by spaces, tabs, or newlines): Where host is the name of a remote host.  This
       entry begins the definition of the autologin process for the specified host.  All following entries up to the next machine entry or the end
       of  the	file apply to that host.  This is the same as machine, except that default matches any name.  There can be only one default token,
       and it must appear after all machine tokens.  This is normally used as follows: default login anonymous password  user@site  The  preceding
       command	line gives the user automatic anonymous ftp login to machines not specified in .netrc.	This can be overriden by using the -n flag
       to disable autologin.  Where user is the username to use at the remote host.  If this entry is found, the  autologin  process  initiates  a
       login  using  the specified name.  If this entry is missing, the autologin process fails.  Where password is the login password to be used.
       The autologin process supplies this password to the remote server.  A login password must be established at the remote host and that  pass-
       word  must  be  entered	in  this  file, or the autologin process fails and you are prompted for the login password.  Where password is the
       account password to be used.  If this entry is found and an account password is required at the remote host, the autologin process supplies
       the  password  to  the  remote  server.	 If  the remote host requires an account password but this entry is missing, the autologin process
       prompts for the account password.  Where macro is the name of an ftp subcommand macro.  The macro definition starts on the  following  line
       and  is	defined  to  contain all of the following ftp subcommands up to the next blank line.  If the macro is named init, ftp executes the
       macro upon successful completion of the autologin process.

FILES

       Contains automatic login information.

RELATED INFORMATION

       Commands:  ftp(1).  delim off

																	  netrc(4)
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