How to free up space on hardrive please help!!

hey everyone im new to mac and i wanted to know if there is anyway i could clean up my haddrive or delete un-needed files. such as cache and what not so please help me i just wanna freee up some space
Thanks!

Hello.
Cache files, in general, are better left alone unless there is a problem with the running of your iBook. Sometimes a troubleshooting measure might involve a system cache cleaning but best left alone, especially by a self confessed newbie
Caches which can be safely deleted are your browser caches. but these rarely take up much space, their default cache sizes are usually in the region of 10-50 MB. Clearing your browsers' History can free up space too. Safari's cache can be emptied by selecting 'Safari' in your menu bar, then selecting 'Empty Cache', & History by selecting 'Clear History' from the History menu. These just get filled up again as you browse, though.
There are, however, other, more permanent, things that you can do to free up disk space.
For example, on my iBook, I have removed GarageBand from Applications and its Loops from HD/Library/Application Support. As my iBook only has a combo drive and I'm not into video editing anyway I have trashed iDVD & iMovie. (Not DVD player). I have also trashed preloaded games and World Book, and its associated files.
Language support files can be removed using Monolingual. Do not remove any English language files, though.
OS X comes with a vast library of printer drivers, the large proportion of which will never be used by the average user.
Printer drivers are in the HD/Library/Printers folder. You can safely delete any named drivers that you don't have a printer for. For example, if you have a Canon, you can remove Epson, Lexmark, Hewlett Packard & Brother drivers. Epson alone takes up in excess of 1gb. You can even remove specific drivers from within the manufacturer's folder. For example, if you have an Epson C86 you can safely trash any other specific drivers in the Epson folder like C46, C66 etc. If, at a later date, you buy a printer whose driver you removed they can be added from your install disk, the disk that comes with the printer or downloaded.
A word of warning: More cautious heads than mine advise against messing in the HD/Library, but if you stick to the examples above, i.e. GarageBand loops, World Book and printer drivers you will be OK.
Check, too, in your music folder. It is possible that you have, say, 'xyz song' in the first level of your Music folder and the same song in Music/iTunes/iTunes Library. If you are sure that you do have 'xyz song' in iTunes, it is safe to delete from 'Music'. The same principle can apply to your Pictures folder and iPhoto Library, but staying with iTunes for a moment, with iTunes open select Edit in the menu bar, then 'Show duplicate songs'. You can trash duplicates if you are sure that they are true duplicates, i.e. exact name, artist and file size.
Some excellent advice has been posted by ~JB~, with corresponding words of caution.
Dr Smoke has some advice here too.
Last but by no means least, when you have finished dumping your unwanted stuff in the trash, don't forget to empty it. You haven't regained the space until you do
Enjoy your new Mac, have fun and if in doubt about deleting anything, ask. There are no stupid questions, everyone here was a newbie once…
Adrian

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14:38:52 SQL> select owner,sum(bytes), sum(BYTES) /1024/1024 "MB" from dba_segments where tablespace
name='USERDB1ADATA' group by owner;
OWNER SUM(BYTES) MB
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BYTES MB
3758096384 3584
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Table created.
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2 dbf_size as (select sum(bytes) size_
3                 from dba_data_files where tablespace_name='TEST'),
4 dbf_free as (select sum(bytes) free_
5                 from dba_free_space where tablespace_name='TEST'),
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SQL>and then I played around with my SQL and came up with
WITH
dbf_size AS (SELECT SUM(bytes) size_
               FROM dba_data_files
              WHERE tablespace_name='TEST'),
dbf_free AS (SELECT SUM(bytes) free_
               FROM dba_free_space
              WHERE tablespace_name='TEST'),
dbf_used AS (SELECT SUM(bytes) used_
               FROM dba_segments
              WHERE tablespace_name='TEST'),
dbf_fbin AS (SELECT SUM(bytes) fbin_
               FROM dba_segments
              INNER JOIN
                    dba_recyclebin
                 ON (tablespace_name=ts_name
                     AND segment_name=object_name)
              WHERE tablespace_name='TEST')
SELECT      size_, -- tablespace size
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     used_, -- segment space used
     fbin_, -- segment space in recycle bin
     (size_ - free_ - used_ + fbin_) left_ -- 64K overhead per data file
FROM      dbf_size, dbf_free, dbf_used, dbf_fbin
/which does
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2 dbf_size AS (SELECT SUM(bytes) size_
3                 FROM dba_data_files
4                WHERE tablespace_name='TEST'),
5 dbf_free AS (SELECT SUM(bytes) free_
6                 FROM dba_free_space
7                WHERE tablespace_name='TEST'),
8 dbf_used AS (SELECT SUM(bytes) used_
9                 FROM dba_segments
10                WHERE tablespace_name='TEST'),
11 dbf_fbin AS (SELECT SUM(bytes) fbin_
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13                INNER JOIN
14                      dba_recyclebin
15                   ON (tablespace_name=ts_name
16                       AND segment_name=object_name)
17                WHERE tablespace_name='TEST')
18 SELECT     size_,
19     free_,
20     used_,
21     fbin_,
22     (size_ - free_ - used_ + fbin_) left_
23    FROM     dbf_size, dbf_free, dbf_used, dbf_fbin
24 /
     SIZE_      FREE_      USED_      FBIN_      LEFT_
   5242880    5177344    2162688    2162688      65536
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SQL> WITH
2 dbf_size AS (SELECT SUM(bytes) size_
3                 FROM dba_data_files
4                WHERE tablespace_name='TEST'),
5 dbf_free AS (SELECT SUM(bytes) free_
6                 FROM dba_free_space
7                WHERE tablespace_name='TEST'),
8 dbf_used AS (SELECT SUM(bytes) used_
9                 FROM dba_segments
10                WHERE tablespace_name='TEST'),
11 dbf_fbin AS (SELECT SUM(bytes) fbin_
12                 FROM dba_segments
13                INNER JOIN
14                      dba_recyclebin
15                   ON (tablespace_name=ts_name
16                       AND segment_name=object_name)
17                WHERE tablespace_name='TEST')
18 SELECT     size_, -- tablespace size
19     free_, -- free space reported
20     used_, -- segment space used
21     fbin_, -- segment space used in recycle bin
22     (size_ - free_ - used_ + fbin_) left_
23    FROM     dbf_size, dbf_free, dbf_used, dbf_fbin
24 /
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Hans Forbrich
Cleaned up the script and tested with second data file added to verify LMT overhead.

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