chmod - Manual

chmod 777 Yes, it is dangerous to set chmod 777 permissions. You should only use chmod 755 for directories and chmod 644 for files. You should only. Start by setting permission numbers to 777 to grant files more access, then use the chmod command to modify specific permissions for each folder in var.

uus777, You can type chmod 777, leave a space after it, and then drag the file or folder from Finder into Terminal. Terminal will fill in the correct path for you..