[SOLVED] Concatenating strings in shell script

Issue

I have declared the following strings in my shell script

#!/bin/bash

DATE= date +"%d.%m.%Y"
FILE_PREFIX="V_Articles_"
FILE_EXTENSION=".json"

I would like to combine these strings to generate a filename

echo "$FILE_PREFIX$DATE_$FILE_EXTENSION"

But no matter what I do, the date string would be printed on the first line and then the rest of the string would be printed on the second line.

Output:

01.10.2023
V_Articles_.json

If i try concatenating the strings like: echo $FILE_PREFIX+$DATE+$FILE_EXTENSION"

I get the following output:

 01.10.2023
 V_Articles_++.json

How can I get the desired output where the date would be included?

Solution

You need to use command substitution $() for the date. It allows you to execute a command and substitute its output in place of the $() expression

Try this:

#!/bin/bash

DATE=$(date +"%d.%m.%Y")
FILE_PREFIX="V_Articles_"
FILE_EXTENSION=".json"
echo "$FILE_PREFIX$DATE$FILE_EXTENSION"

Answered By - EeEmDee

Answer Checked By - Robin (WPSolving Admin)