Question

I need to extract data from files in directory /tmp/log.
I have no problem extract from single file.

#!/bin/bash
while read line;
do
  echo $line
done < /tmp/log/file1

I want try it with multiple files /tmp/log/* but it returned error ambiguous redirect.
Any idea how can I around it?

Answer 1

You could read the files in a for loop as follows:

for file in /tmp/log/*; do
    while read -r line; do
        echo "$line"
    done < "$file"
done

The strategy is just wrap your while loop with a for loop that takes care of processing each of the files one at a time.