Hello,
Here is the problem i have folks.I changed my account from admin to a standard user in the users and groups settings in mint 17 and now i cant do a single thing..i cant install anything.software manager will not open,,in fact anything that requires admin access will not open,
Please can somebody help me to change from standard user to admin user.

Thank you.

You don't indicate which Mint you have so I will just tell you what I have for Mint Mate 17. In the Control Center opening Users and Groups I see my user name and the window has an 'account type' option, to the right it says Change and clicking that opens a new window. Here there are three options, Custom, Administrator and Desktop User. It looks like you selected Desktop user because in that window it states "Can perform common tasks. Can't install software or change settings affecting all users. If this is what you have done, then you can try to change that user to Custom. If that doesn't work, create a new user with Custom privileges. My single user is set to Custom and I have no problem doing administrative tasks.

hi yancek.
i cant even open user and groups.I changed from being an admin user to standard.
im running linux mint 17.

Thanks.

Hi Linuxman72,

Probably you broke your 'sudo', don't worry, it happens to a lot of guys. It is easy to fix by rebooting into 'recovery mode.'

Here's a link to a tutorial how to fix broken sudo. The site is written for Ubuntu, but Mint is based on Ubuntu, so the same advice will probably work. The author is a regular over at Ubuntu Forums and helped me when I was a Linux noob. His tutorials are accurate and trustworthy in my opinion. (It is bad to blindy follow random internet linux advice, unless you trust the source!)

http://www.psychocats.net/ubuntu/fixsudo