7 ways sudoers Ubuntu

 

Here are some different ways to grant “sudo” permission to a user in Linux (tested on Ubuntu, but some methods here are universal in major Linux distributions).

Assuming that we want to make a user ‘hduser’ a “sudoer” :

$ sudo addgroup hdgroup

$ sudo adduser hduser --ingroup hdgroup

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1. Grant direct permissions to user via sudoers file

$ su root -c "vi /etc/sudoers"

Add a similar line to the line of ‘root’ :

## Allow root to run any commands anywhere
root ALL=(ALL) ALL

hduser  ALL=(ALL) ALL

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2. Grant direct permission to user’s group via sudoers file

Instead of granting the permission to user, we will grant permission for a group to which the user belongs.

$ su root -c "vi /etc/sudoers"

Add a line for user group (hdgroup here), which starts with a “%” :

## Allow root to run any commands anywhere
%hdgroup  ALL=(ALL) ALL

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3. Add user to group ‘admin’ by command

(In RedHat-like system: CentOS, SUSE, etc… , the sudo group name is ‘wheel’ , not ‘admin’)

$ su root -c "vi /etc/sudoers"

Instead of granting the permission to user, we will grant permission for an existing group (such as wheel or admin), then add our user to that group.

## Allows people in group wheel to run all commands
%wheel ALL=(ALL) ALL

$ useradd -G wheel hduser  ## usermod -a -G wheel hduser

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4. Add user to group ‘sudo’ by command

 

$ sudo usermod -aG sudo ducquoc

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5. Add user to group ‘admin’ right when creating user

(In RedHat-like system: CentOS, SUSE, etc… , the sudo group name is ‘wheel’ , not ‘admin’)

$ sudo adduser ducquoc admin

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6. Add user to group ‘sudo’ right when creating user

 

$ sudo adduser ducquoc sudo

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7. Grant direct permission to user’s group via sudoers.d folder

 

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gl & hf,

 

./.