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incorrect file reading in bash
Posted on 2016-09-25
Hi Experts.
I'm writing an automated Script in Bash, and I've got into a bit of a block...
I have a file called /scripts/resources/nodes,t
The file currently hold only three lines:
and I have the following code:
However, when I run the scripts and cat the resulting file, I only see 2 lines:
I'm writing an automated Script in Bash, and I've got into a bit of a block...
I have a file called /scripts/resources/nodes,t
The file currently hold only three lines:
10.5.17.3
10.5.17.4
10.5.17.5
and I have the following code:
#!/usr/bin/bash
filename="/scripts/resources/nginx_nodes_list.txt"
while read -r line
do
NodeIP=$line
echo "server $NodeIP {" >> /scripts/testloop.txt
done < "$filename"
However, when I run the scripts and cat the resulting file, I only see 2 lines:
meaning the scipt skips the last one, any idea why?
server 10.5.17.3 {
server 10.5.17.4 {
[X]
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7 Comments
Active today
When I set up a test doing the same thing, it worked.
Try double checking your input data just to make sure everything is actually as you say:
Try double checking your input data just to make sure everything is actually as you say:
cat /scripts/resources/nodes,txt
cat /scripts/testloop.txt
Active today
Suggest: Dump the file in hex and ASCII to confirm there are no hidden control characters.
try read without -r option.
Also, try to run script with bash -x and see what you get. It will show you each command while executing the script
Also, try to run script with bash -x and see what you get. It will show you each command while executing the script
You get this if the last line of the file does not have a carriage return (lots of things seem to do this, including some IDEs and Windows editors).
One thing you could try is:
One thing you could try is:
grep . "$filename" | while read -r line
do
NodeIP=$line
echo "server $NodeIP {" >> /scripts/testloop.txt
done
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