I installed LAMP and WordPress on my system a week ago. Since I couldn't create Child Themes in WordPress and work with PHP folders for my other projects collocated in var/www without using Nautilus I wanted to solve the permissions issue.
I hoped to bring a solution carrying out the commands on this page for my WordPress folder: http://wiki.apache.org/httpd/FileSystemPermissions.
This allowed me to play with any file in the folder like creating and modifying .css files through WP Admin, etc. But after a restart I discovered that I can't change DNS settings of my network connections in the list anymore because it is asking me the root password and even though I enter the password it doesn't let me do the action giving "insufficient privileges" error.
Can you help me correct the mistake I possibily made during the configuration and, maybe, configure again the permission and ownership settings for var/www/somefolder as it is adviced to be configured under general circumstances?
Thanks in advance!
I fear, you can't reverse the change unless you saved the permission settings somewhere.
I recommend this, Install the same softwares in another machine, check the permissions there, copy them and use the same permissions for your machine to correct the errors.
Assuming you ran the commands in the link you gave, simply run
You should know that by default, ubuntu uses www-data as the apache (and other http servers) user/group.
See also:
https://help.ubuntu.com/community/ApacheMySQLPHP