In our previous post “using a file as a storage device” adrian asked a question to us : is it possible to extend the size on the ‘filename’ file? We searched on it and figured out the answer. Let’s roll 
Lets say you create a file name /newfile of size 200MB and format it, after a while you want to extend the file size. To do that do the following
Step 1. Lets say you want to increase the file size by 100MB
dd oflag=append conv=notrunc if=/dev/zero of=/newfile bs=1MB count=100
Now, the file is 100MB larger.
Step 2. Run file system check on the file
fsck -f /newfile
Step 3. Now if you formatted the file system in ext2,3 or 4, you can resize it by using
resize2fs /newfile.
If you are unable to understand this post fully , please visit using file as a storage device first and check out the comments too . Thanks to adrian for comment
Pages : 
