[ILUG] help needed

[Liam Bedford]

dinar ali kadri wrote:
> Hi,
> 
> i would like to know how can i convert a pdf document to html pages.  
> When ever i want to change the format of graphics i simply give command  
> of mv like mv test.png test.gif and it converts the format automaticly  
> i am new in linux platforms , belongs from microsoft window.One other  
> thing how can i set my class path i mean not a user path a global path  
> so every user can use java without exporting a path.
> 
> My other question is about bandwith i am really confusse with this  
> term.If i am on some network and other machines knows my address then  
> why the bandwith thing comes from ISP and why do they offer uplink ?
> Is it not possible that i can get connected to internet without my isp
> like my own ip address and who assign ips to everyone on internet.
> 
Slow down. If you want any help you'll need to be way more precise and 
accurate about what you say.

1) i would like to know how can i convert a pdf document to html pages.

I think there's an application called pdf2html. Find out what the 
package management system is on your distribution. For Fedora Core it's 
yum. Run
yum search pdf2html
and see what you get.

2) When ever i want to change the format of graphics i simply give 
command of mv like mv test.png test.gif and it converts the format 
automaticly

mv doesn't do any conversion. It only renames the file. Linux doesn't 
care (generally) about the extension of files. It's not windows. If you 
rename file.jpg to file.png, it's still a Jpeg file, just called .png. 
It may open okay (because most image applications will read the data to 
find out what it is rather than use the filename). If you want proof:
Get a jpg file.
run
file filename.jpg
mv filename.jpg filename.png
file filename.png

It'll still tell you that the file is a jpeg.

3) how can i set my class path i mean not a user path a global path so 
every user can use java without exporting a path?

This depends on what shell they use. If they're using bash, you can set 
it in /etc/profile. There's equivalents for ksh, zsh, tcsh, etc, but I 
don't know them.

4) If i am on some network and other machines knows my address then why 
the bandwith thing comes from ISP and why do they offer uplink ?

The bandwidth available to you is the smallest in the chain between you 
and the server you're talking to. Think of it as roads. If you drive 
from Dublin to Galway, some of the roads are motorway, some are dual 
carriageway, and some are single carriageway. Some go through villages. 
So you can't get the cars through at the speed of a motorway all the 
way. Same with your computer. The network connection of your computer is 
probably 10 or 100 megabit, and your internet connection is between 
50kilobit and 1 megabit. So you can't go any faster than your internet 
connection.

They offer an uplink, because otherwise you wouldn't be able to send 
data. But most people download more than they send, so the speeds are 
asymmetric.

5) Is it not possible that i can get connected to internet without my 
isp like my own ip address and who assign ips to everyone on internet.

You can't get connected to the internet without an internet provider. As 
for who assigns ips to everyone on the internet. IANA give IPs to 
regional internet registries, who allocate them to local internet 
registries, who assign them to customers. I suggest
http://www.ripe.net

L.