I just downloaded .rar file. But i can’t open it under my Fedora operating systems. How to open it?

RAR is a proprietary compression format widely used today. By default, Fedora unable to open RAR files. So, you need to install a software called unrar.

How to install unrar on Fedora?

Just use yum command as follows :

# yum install unrar

Under Ubuntu, you need to type apt-get as follows to install unrar program:

# apt-get install unrar

How to use unrar?

Extract a RAR file into the current directory.

# unrar e [filename].rar

eg: # unrar e testing.rar

List contents of a RAR file

# unrar l [filename].rar

eg: # unrar l techkaki.rar

If you want to know more on how to use unrar function, you just type man unrar on your terminal.

I used open office on my Mac OS X 10.5.8. Normally i have no issue in editing excel file. But today, i try to open the excel file, it prompt out an error “Document file XXXXX is locked for editing By: techkaki (13.08.2009 09:13)”

This excel file only allow read only. How to unlock this file for editing?

This problem can be solve by removing a file named “.~lock…”

Before that, you have to show all the hidden file. How to show hidden file in Mac OS X? Click Here to refer

Once you Mac OS X show all the hidden file, you will realize there is a file named “.~lock…”

Just remove the file named “.~lock…”.

After deleting that file, you should able to open the spreadsheet in edit mode.