How to write a shell script to connect to another server?
Hello friends
I want to write a script in which I will connect to my friends network.
I want to use SSH.
Even they can use the script to log into my network and copy files.
ssh user@hostname command
I know the following command will help me to log into Google's servers and see all the people who are logged into their system.
ssh Angelo@www.google.com who
I guess the following program will help to copy the files.
…................................................................................................... .................................................................................................... .....
Code:
* #!/bin/sh
** $ cat mycp
*#
*# copy a file
*#
* if [ "$#" -ne 2 ]
* then
*** echo "Usage: mycp from to"
*** exit 1
* fi
* from="$1"
* to="$2"
*#
*# See if the destination file exists
*#
*if [ -e "$to" ]
*then
*** echo "$to already exists; overwrite (yes/no)?"
******* read answer
****** if [ "$answer" !=yes ]
****** then
********* echo "Copy not performed"
********* exit 0
****** fi
*fi
*#
*# Either destination doesn't exist or "yes" was typed
*#
* cp $from $to**** # proceed with the copy
* $
I need your help to write a script to this end.
I can log into their networks and copy files and exit.
I want to use SSH to log into the networks.
Your help is deeply appreciated.
This will log into a server with ssh and run a script file from your computer with the BASH shell. You can substitute whatever shell you want as long as the server has it.
Code:
ssh user@host /bin/bash < /path/to/script
This will of course still ask for a password. If you want to login with no password, you can use a pre-shared key.
The script I have written doesn't work.
There is an error message. I have tried in vain to rectify it. Could you please look at it too?
Hi.
What's the error? And what's with all those asterisks? I was about to edit your post, fixing a couple of things along the way, to look more like this:
Code:
#!/bin/sh
# ???? $ cat mycp
#
# copy a file
#
if [ "$#" -ne 2 ]
then
echo "Usage: mycp from to"
exit 1
fi
from="$1"
to="$2"
#
# See if the destination file exists
#
if [ -e "$to" ]
then
echo "$to already exists; overwrite (yes/no)?"
read answer
if [ "$answer" != yes ]
then
echo "Copy not performed"
exit 0
fi
fi
#
# Either destination doesn't exist or "yes" was typed
#
cp $from $to**** # proceed with the copy # **** means?
I am a beginner when it comes to scripting in Linux.
So please correct the script and rewrite.
The script should copy directories and files from my friend's computer. Afterwards it should terminate the activity.
I know it will ask a password; that is all right.
The following is the error message:
Code:
[htr@localhost ~]$ ./mycp
./mycp: line 7: $: command not found
Usage: mycp from to
[htr@localhost ~]$
Last edited by pludi; 04-22-2010 at 06:27 AM..
Reason: code tags, please...
I am a beginner when it comes to scripting in Linux.
So please correct the script and rewrite.
We're not trying to be obstinate. Your script is so incomplete and garbled there's really no fixing it at this point. If you've posted it as you actually have it -- crazy asterisks and all -- then it should be thrown out and rebuilt from scratch. If not, please post how you actually have it, for we are not psychic here.
Code:
The script should copy directories and files from my friend's computer.
Why not use scp? It connects via ssh, which you say you have, and does nearly exactly what you want.
Code:
# copy file/dir from local host to remote host
scp -r localsource username@host:/path/to/remotedestination
# copy file/dir from remote host to local host
scp -r username@host:/path/to/remotesource localdestination
So easy you might not need to build a script around it at all. It doesn't and can't prompt about overwriting files, unfortunately.
Last edited by Corona688; 04-22-2010 at 12:40 PM..
Thanks Corona for the reply.
You wrote the following: If not, please post how you actually have it, for we are not psychic here.
It seems you are annoyed by my questions. I am a beginner here.
I am trying to learn from you all.
Please be patient. I badly need your help. If my friends have Windows networks, does the command scp works fine?
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
I just came home from work. I went to the gym after work. I am tired
I need more help. I will post tomorrow again. I must sleep now.
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