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Full Discussion: How to get a login name of a person who used 'su' and act with different user-name?
Top Forums UNIX for Advanced & Expert Users How to get a login name of a person who used 'su' and act with different user-name? Post 302284985 by fimblo on Friday 6th of February 2009 05:16:33 PM
Old 02-06-2009
Even if you don't have a pretty version of ps (with -forest flag), nor
the ptree app, you can still get the parent pid from a process when
you run a ps -ef.

You should be able to find your process (owned by root), and its
pid. Next to it is the parent pid. Now look for this pid, and _its_
parent pid. And so on.

Another way of finding out more about a process is by looking at its
environment variables. This will work if the user did a su, without
the '-' char as an argument, since most of the original environment
variables will be retained.

pargs -e <pid>
 

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LEARN ABOUT MINIX

chsh

CHSH(1)                                                            User Commands                                                           CHSH(1)

NAME

       chsh - change login shell

SYNOPSIS

       chsh [options] [LOGIN]

DESCRIPTION

       The chsh command changes the user login shell. This determines the name of the user's initial login command. A normal user may only change
       the login shell for her own account; the superuser may change the login shell for any account.

OPTIONS

       The options which apply to the chsh command are:

       -h, --help
           Display help message and exit.

       -R, --root CHROOT_DIR
           Apply changes in the CHROOT_DIR directory and use the configuration files from the CHROOT_DIR directory.

       -s, --shell SHELL
           The name of the user's new login shell. Setting this field to blank causes the system to select the default login shell.

       If the -s option is not selected, chsh operates in an interactive fashion, prompting the user with the current login shell. Enter the new
       value to change the shell, or leave the line blank to use the current one. The current shell is displayed between a pair of [ ] marks.

NOTE

       The only restriction placed on the login shell is that the command name must be listed in /etc/shells, unless the invoker is the superuser,
       and then any value may be added. An account with a restricted login shell may not change her login shell. For this reason, placing /bin/rsh
       in /etc/shells is discouraged since accidentally changing to a restricted shell would prevent the user from ever changing her login shell
       back to its original value.

FILES

       /etc/passwd
           User account information.

       /etc/shells
           List of valid login shells.

       /etc/login.defs
           Shadow password suite configuration.

SEE ALSO

       chfn(1), login.defs(5), passwd(5).

shadow-utils 4.5                                                    01/25/2018                                                             CHSH(1)
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