Hjälp! Darwin/bsd console på ibook

Option 3 (advanced): Use the command line and the fsck_hfs -l command.

Start up your computer and log in as an administrator. 
Open Terminal (/Applications/Utilities). 
At the prompt, type the following command and then press Return to determine your filesytem ID: 

df -hl 
Look for some lines of text that look like this: 

Filesystem Size Used Avail Capacity Mounted on
/dev/disk0s3 37G 20G 17G 55% /
/dev/disk0s5 37G 37G 641M 98% /Volumes/Storage
  
Make a note of the first "disk" name that appears after /dev/, such as "disk0s3." This is your filesystem ID for your startup volume. 
At the prompt, type the following command and then press Return: 

df -hl 
Then type the following command, where "disk0s3" is your filesystem ID you noted in step 4, then press Return: 

sudo fsck_hfs -l /dev/disk0s3 
When prompted, enter your admin password, then press Return to begin the verification. 
You should see messages like these during the disk check: 

** /dev/rdisk0s3 (NO WRITE)
** Root file system
** Checking HFS Plus volume.
** Checking Extents Overflow file.
** Checking Catalog file.
** Checking multi-linked files.
** Checking Catalog hierarchy.
** Checking Extended Attributes file.
** Checking volume bitmap.
** Checking volume information.
** The volume Macintosh HD appears to be OK.