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Created on Dec 4, ’22 ・ Updated on Mar 7, ’23


  • Configuration files in: /etc/sudoers and /etc/sudoers.d/*.
  • Use visudo to edit configuration files, to ensure correct syntax.
# from ALL machines, user2 can install httpd using yum
user2 ALL = /usr/bin/yum install httpd

# allow all users in group web to restart httpd without having to enter their password
%web ALL = NOPASSWD: /usr/bin/systemctl restart httpd

# all user student to use touch and mkdir as root:root
student ALL = (root:root) /usr/bin/touch, /usr/bin/mkdir

# specify PATH where running sudo command
Defaults    secure_path = /sbin:/bin:/usr/sbin:/usr/bin

# allow user2 to run vim as root but preventing vim from executing other commands
user2 ALL = (root:root) NOEXEC: /usr/bin/vim

# adds /data to PATH for user2
Defaults:user2 secure_path += :/data


-s run default shell of specified user
-i same but as a login shell
-g specify group with which to run sudo
-u specify user to impersonate
-e edit a file instead of running a command, same as sudoedit

# omits #include directive
$ sudo cat /etc/sudoers | grep -E '^[^\s#]'


  • /etc/sudoers.d/\* are concatenated to /etc/sudoers
  • User does not need to belong to sudo group
  • Add authorizations in config files, e.g.
$ cat /etc/sudoers.d/user2
user2 ALL = /usr/bin/yum install httpd, other cmds