My finder keeps asking for my password when i try to delete things. and when i do enter in my password nothing is deleted. i tried going into terminal and typing in su, but it wouldnt let me type my password

Question

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Answer 1

Never empty the Trash in the shell (Terminal.)
1. Triple-click the line below to select it:
~/.Trash
2. Right-click or control-click the highlighted line and select
Services ▹ Show Info
from the contextual menu.* An Info dialog should open.
3. The dialog should show "You can read and write" in the Sharing & Permissions section. If that's not what it shows, click the padlock icon in the lower right corner of the window and enter your password when prompted. Use the plus- and minus-sign buttons to give yourself Read & Write access and "everyone" No Access. Delete any other entries in the access list.
4. In the General section, uncheck the box marked Locked if it's checked.
5. From the action menu (gear icon) at the bottom of the dialog, select Apply to enclosed items and confirm.
6. Close the Info window and test.
*If you don't see the contextual menu item, copy the selected text to the Clipboard (command-C). Open a TextEdit window and paste into it (command-V). Select the line you just pasted and continue as above.