On Linux, how to give user permission to write to a folder?

To give user permission to write to a folder, you have two options:

Change the owner of the folder

The command chown (change owner) allows to change the user and/or group ownership of each given file or folder.

The following example set rights to the group www-data on folder /path/to/folder/ and subdirectories :

chown -R username /path/to/folder/

The -R option (Recursive) apply the command to files and directories recursively.

Change folder permission

The command chmod (change mod) change the access permissions of files or directories:

sudo chmod -R 777 /path/to/folder/

In the previous example, 777 gives Read / Write / Execute access to to all users. Change this parameter according to your needs.

The -R option (Recursive) apply the command to files and directories recursively.

The command chown allows to change the user and/or group ownership of each given file or folder.

The following example set rights to the group www-data on filename.txt:

chown www-data filename.txt

The command chown allows to change the user and/or group ownership of each given file or folder.

The following example set rights to the group www-data:

chown www-data filename.txt