Drupal 4.5.x or older

Can't download anything with Drush today. Assuming this is related to Drupal's FTP server being down which is causing links on the site not to work. Does anyone know of a workaround with Drush? I am kind of new to the tool.

drush dl views
PDO::__construct(): [2002] No such file or directory (trying to [warning]
connect via unix:///var/mysql/mysql.sock) environment.inc:1267
File views-7.x-3.0-rc1.tar.gz is corrupt (wrong md5 checksum)

For nearly a month, I have been unable to get to my administration menu. I consistently get an error message. I'm able to login and see my administrative functions, but that's all I can do. Please help.

i know its rare pice of information, but where i can get the api for 4.x and other tutorials and documentation about it?

I have a PDF file saved at www.mywebsite.com/hosted/nameoftheform.pdf

How can I change the pdf file saved here?

Thank you!

PS I don't know which version of Drupal my company website is built in

Where can I insert keywords on my back end? Please help?

How to implement the search feature within a website which is managed entirely through the Drupal system. The search needs to return PUBLISHED documents (i.e., .doc, xls, pdf, etc.), and not html documents with search query.

Should i implement search feature with Drupal search module or Google Search Appliance(GSA) for the search. I am new to Drupal, but will Drupal search module can search for PUBLISHED documents (i.e., .doc, xls, pdf, etc.) only.