Cacher is the code snippet organizer for pro developers

Add a new user to the www-data group

In this example, add a new user called vivek to the www-data group, enter:

 
sudo useradd -g www-data vivek
 
### set the password for vivek user ###
sudo passwd vivek
 
To verify new settings, enter:

id vivek
groups vivek
The group name www-data is the user's initial login group i.e. vivek has been added to www-data primary group only.

www-data supplementary groups membership

To add a new user called vivek to supplementary groups called www-data and ftp, enter:

 
sudo groupadd vivek
sudo useradd -g vivek -G www-data,ftp vivek
sudo passwd vivek
 
To verify new settings, enter:

id vivek
groups vivek
Add a existing user to www-data group

Type the following command to add an existing user called vgite to the www-data group, enter:

 
sudo usermod -a -G www-data  vgite
id vgite
groups vgite
 
Above command will add the user vgite to the supplementary group called www-data. Use -a option only with the -G option.