sudo cat /etc/sudoers

returns:

#
# This file MUST be edited with the 'visudo' command as root.
#
# Please consider adding local content in /etc/sudoers.d/ instead of
# directly modifying this file.
#
# See the man page for details on how to write a sudoers file.
#
Defaults	env_reset
Defaults	mail_badpass
Defaults	secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
Defaults	use_pty
 
# This preserves proxy settings from user environments of root
# equivalent users (group sudo)
#Defaults:%sudo env_keep += "http_proxy https_proxy ftp_proxy all_proxy no_proxy"
 
# This allows running arbitrary commands, but so does ALL, and it means
# different sudoers have their choice of editor respected.
#Defaults:%sudo env_keep += "EDITOR"
 
# Completely harmless preservation of a user preference.
#Defaults:%sudo env_keep += "GREP_COLOR"
 
# While you shouldn't normally run git as root, you need to with etckeeper
#Defaults:%sudo env_keep += "GIT_AUTHOR_* GIT_COMMITTER_*"
 
# Per-user preferences; root won't have sensible values for them.
#Defaults:%sudo env_keep += "EMAIL DEBEMAIL DEBFULLNAME"
 
# "sudo scp" or "sudo rsync" should be able to use your SSH agent.
#Defaults:%sudo env_keep += "SSH_AGENT_PID SSH_AUTH_SOCK"
 
# Ditto for GPG agent
#Defaults:%sudo env_keep += "GPG_AGENT_INFO"
 
# Host alias specification
 
# User alias specification
 
# Cmnd alias specification
 
# User privilege specification
root	ALL=(ALL:ALL) ALL
 
# Members of the admin group may gain root privileges
%admin ALL=(ALL) ALL
 
# Allow members of group sudo to execute any command
%sudo	ALL=(ALL:ALL) ALL
 
# See sudoers(5) for more information on "@include" directives:
 
@includedir /etc/sudoers.d