My Ubuntu user account name "user-3121" with type as "Administrator". There is one more account named "sysadmin" with type as "Administrator". How do I know whether "sysadmin" can login as me and view my files in "user-3121"?
My /etc/sudoers file has this:
Cmnd_Alias SHELLS = /bin/sh,/bin/bash,/bin/ksh, /usr/bin/x11/passwd
Cmnd_Alias SU = /usr/bin/su,/bin/su,/usr/bin/gksudo,/usr/bin/sudo,/usr/bin/su bash,/usr/bin/sudo /bin/bash,/usr/sbin/visudo
Cmnd_Alias PASS = /usr/bin/passwd root,/bin/* * root,/bin/* * sysadmin,/bin/* * /home/sysadmin,/usr/bin/passwd
Cmnd_Alias EDIT= /bin/* /etc/sudoers,/bin/* sudoers,/bin/* /etc/passwd,/bin/* passwd,/bin/* /etc/group,/bin/* group,/bin/* /etc/shadow,/bin/* shadow,/*/*/[a-z]* /etc/sudoers,/*/*/[a-z]* /etc/passwd,/*/*/[a-z]* /etc/group,/*/*/[a-z]* /etc/shadow,/*/*/[a-z]* sudoers,/*/*/[a-z]* passwd,/*/*/[a-z]* group,/*/*/[a-z]* shadow
Cmnd_Alias CMDS = /usr/sbin/userdel * sysadmin,/usr/sbin/userdel sysadmin,/usr/sbin/deluser * sysadmin,/usr/sbin/deluser sysadmin
root ALL=(ALL) ALL, !CMDS
%admin ALL=(ALL) ALL, !SHELLS, !SU, !CMDS, !PASS, !EDIT
%sudo ALL=(ALL) ALL,!SHELLS, !SU, !CMDS, !PASS, !EDIT
sysadmin ALL=(ALL) ALL
administrator ALL=(ALL) ALL
Why "user-3121" is missing in /etc/sudoers? If "sysadmin" can read my data, how do I prevent that?
P.S. No one knows the "root" (su) password except me.