I need to write a short script

Baran · 04-19-2005, 05:19 AM

Hello,

I need to write a short script, I didn't do such a thing before so I actually don't have any idea.

The script is supposed to do these:

- Every morning at 10:00 o'clock it will lauch korganiser
- Take a screenshot of the window by using ksnapshot
- Save the file to desktop with the name TodaysPlans.jpg
- Login to a remote server using ssh (I can already do that manually, but dont know how to login using one line only)
- Rename the TodaysPlans.jpg in the server with the new name <YesterdaysDate>.jpg
- Upload the TodaysPlans.jpg to the server
- Logout

This is all I want

It shouldn't be that difficult. But I really need your help.

Thanks in advance

-Baran

pycoucou · 04-19-2005, 05:44 AM

Hi Baran,

some tips to do so:

For the scheduler: use cron/at to lauch your script at 10AM. Cron is quite simple, check the help.
For the screenshot, I don't know ksnapshot but you probably know it, to perform the shot with a command line.

To change the name on the server, do ssh login@server command (you cannot work interactively).
To have access, use RSA key (man ssh-keygen). You would be identified without giving a password.

And then use scp to remotely copy your snashot to the server.

This algorithm should work. I let you with the manpages/help/howtos that blossomed on internet.

Cheers,
PY

pycoucou · 04-19-2005, 05:45 AM

Oops.. I forgot to laucnh korganiser... Hmm, the dirty way I see is to do so by lauching it as a background task and then kill it.... I'm not happy with this solution but it should work.

Baran · 04-19-2005, 06:16 AM

Hi,

Thanks for the reply, it seems a little easier now, still I cannot do that completely. However:

- After running korganiser in the background, how can I kill it without knowing its PID? Is there way to kill in other ways?

scuzzman · 04-19-2005, 06:19 AM

Code:

killall korganiser

will kill it for you.

ahwkong · 04-19-2005, 06:33 AM

$! in bash will also give you the PID of last executed process

Check it out:

section 3.2.5. Special parameters

in

http://www.tldp.org/LDP/Bash-Beginne...ect_03_02.html

Baran · 04-19-2005, 09:30 AM

Ok !

I read help documents about ksnapshot but I couldn't figure out a way to take a snapshot of a window in KDE.

Is there way that you can suggest to take a snapshot and save it using the command line?

homey · 04-19-2005, 09:42 AM

X Window Capturing a screen shot: Five methods

Code:

1. XAUTHORITY=/var/gdm/:0.Xauth DISPLAY=:0.0 import -window root image.png
2. import -window root image.jpg		4. Alt + Print Screen
3. xwd -display :0 -root >image.xwd	5. Ksnapshot
    convert image.xwd image.jpg

Try using import ( #2 ) as it may be easiest for you.

You can also use script or setterm but they are for capturing text in the console, not windows.

Baran · 04-19-2005, 03:29 PM

Thanks everyone for the support

Now I started to write it.

I guess

import -window root image.jpg

works perfectly. So I will use that one.

I guess I have only one problem left

Which is to login to the remote server with the command line without any password prompt.

I read the documents about ssh and ssh-keygen but they are not clear. I didn't understand where to create the keys, in the local machine or the remote and what should I do with the key?

pycoucou · 04-22-2005, 09:55 AM

A couple of days later...

ssh-keygen generates two files
- private id
- public id

if you want to go from login1@computer1 to login2@computer2 using these keys you need to save the private id as ~login1/.ssh/identity on computer1 and the public id on ~login2/.ssh/authorized_keys.

Now if as login1 on computer1, you type ssh computer2 -l login2, the authentification happens through the exchange of key and you don't need any password.