file system seems to be read only
 

hello!
I am new to linux but eager to learn.
I am trying to add a folder to /user/local but the paste button is grayed out. Also I tried to edit the /etc/sysctl.conf because I want to disable ipv6. but the editor says its read only.
what should I do?

Those are system files and you need to be root. Check the owner:group and permissions with the command: ls -l /etc/sysctl.conf

thank you for your help!