How to import the content of a variable from a text file into bash script?

Question

I would like my bash script to import variables from a text file

#!/bin/bash
for i in 1 2 3
do
    IMPORT THE CONTENT OF FILE file$1.txt
    python $VAR
done

Where the file text contain the value of the variable as

VAR=SOMETHING

I tried cat file$i.txt but the $VAR is not populated. What would be a way of doing that?

sseLtaH · Accepted Answer · 2022-08-29 12:09:18Z

3

Using source

$ cat vars.txt
var1="Hello"
var2="World"
$ source vars.txt
$ echo "$var1 $var2"
Hello World

answered Aug 29, 2022 at 12:09

sseLtaH

2,9261 gold badge8 silver badges20 bronze badges

White Owl · Accepted Answer · 2022-08-29 12:02:31Z

0

The backticks is the key here:

VAR=`cat file.txt`

answered Aug 29, 2022 at 12:02

White Owl

5,2971 gold badge9 silver badges16 bronze badges

2 Answers 2