[SOLVED] A script for uploading a file via scp in a loop

massy · 06-09-2014, 04:39 AM

I've used this code to upload a package to some hosts that their IPs are in the IPvar, but it is runs only one time!

Code:

#!/bin/bash
while read IP

do
     /usr/bin/scp /home/farid/Package/sudo_1.8.5p2-1+nmu1_i386.deb check@$IP:/home/check

done < IPvar

linosaurusroot · 06-09-2014, 05:20 AM

Are you saying you have multiple lines in the IPvar file but only the first is processed?

I just tried something almost identical and it worked. I could imagine you'd have a problem if the program in the loop read STDIN and deprived the shell of further input from IPvar.

massy · 06-09-2014, 06:52 AM

Quote:

Originally Posted by linosaurusroot

Are you saying you have multiple lines in the IPvar file but only the first is processed?

I just tried something almost identical and it worked. I could imagine you'd have a problem if the program in the loop read STDIN and deprived the shell of further input from IPvar.

yes I have some IPs in IPvar

Guttorm · 06-11-2014, 08:49 AM

Hi

scp uses ssh which messes up reading from standard input. Remember both ssh and scp can ask for password. And ssh sends stdin to the computer it connects to. Use a for loop instead:

Code:

#!/bin/bash
for IP in $IPvar ; do
    /usr/bin/scp /home/farid/Package/sudo_1.8.5p2-1+nmu1_i386.deb check@$IP:/home/check
done

schneidz · 06-11-2014, 09:07 AM

what does this yeild:

Code:

#!/bin/bash
echo $IPvar
while read IP

do
     echo /usr/bin/scp /home/farid/Package/sudo_1.8.5p2-1+nmu1_i386.deb check@$IP:/home/check

done < IPvar

jungliztik · 07-03-2014, 06:05 AM

Sounds like you want something like:

Quote:

maxjobs = 10

foreach line in the file {
jobsrunning = 0
while jobsrunning < maxjobs {
do job &
jobsrunning += 1
}
wait
}

job ( ){

for IP in $( cat IPvar )
do
/usr/bin/scp /home/farid/Package/sudo_1.8.5p2-1+nmu1_i386.deb check@$IP:/home/check
done
}

Borrowed from MrC's post on http://ubuntuforums.org/showthread.php?t=382330 as I'm on my phone. I've done similar before and this method would allow you some controlled concurrency to your activity.