Checking files in remote server and decide to copy file or not


 
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# 1  
Old 04-08-2013
Question Checking files in remote server and decide to copy file or not

Hi there,
I have a problem in my script,
I need to check whether file exists in remote server or not,
if the file exists, then stop copy
else copy the file to the server..

my code is something like this
Code:
while read $server
do
if ssh $server "cd $directory_name; if [ -r $file2copy ]; then echo "Error: File $file2copy already exists, stop copying..exit"; fi"
 else scp -r $file2copy $server:~/$directory_name
 echo " file copied"
done

my problem it doesn't do the checking actually and just running the stop copying..

anyone can help?

Last edited by beezy; 04-08-2013 at 01:17 AM.. Reason: typo
# 2  
Old 04-08-2013
Check out the info on the below link for info on checking if file exists on remote server via ssh:
https://www.unix.com/shell-programmin...le-exists.html
# 3  
Old 04-08-2013
The thread spacebar pinted you to is a good one. I suggest you study it. Just a final observation on your code:

Quote:
Originally Posted by beezy
Code:
while read $server
do
if ssh $server "cd $directory_name; if [ -r $file2copy ]; then echo "Error: File $file2copy already exists, stop copying..exit"; fi"
 else scp -r $file2copy $server:~/$directory_name
 echo " file copied"
done

This should not work at all because it contains a syntax error. I have indented it to make it more obvious:

Code:
while read $server ; do
     if ssh $server "<cmd>"
     else scp -r $file2copy $server:~/$directory_name
     echo " file copied"
done

The "if" is nowhere closed by a "fi" and the mandatory "then" is missing too. In addition:

Code:
"cd $directory_name; if [ -r $file2copy ]; then echo "Error: File $file2copy already exists, stop copying..exit"; fi"

This should not work because double quotes can't be nested.


I hope this helps.

bakunin
 
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