How to add new input to the configuration file using bash script

Question

I want to add new input to the configuration file from terminal using bash script. This is what I tried:

echo Hello, please add the new text here
read varname
sed -i "s/\<my-images=>/& $varname/" /home/myconfig
echo Image $varname has been added to the configuration. Thanks!!

/home/myconfig has

id=1
max-mb=1000
my-images=customimage

And required output is

id=1
max-mb=1000
my-images=mynewtext customimage

So mynewtext should be added after my-images= Anyway to do this?

What happens when you run your solution?

robinsax
– robinsax

2020-05-12 19:13:45 +00:00
Commented May 12, 2020 at 19:13 — robinsax
– robinsax, Commented May 12, 2020 at 19:13
No Change. Remains the same. @robinsax

Siddharth
– Siddharth

2020-05-12 19:15:22 +00:00
Commented May 12, 2020 at 19:15 — Siddharth
– Siddharth, Commented May 12, 2020 at 19:15

robinsax · Accepted Answer · 2020-05-12 19:24:36Z

1

The problem is with the regex match you're passing to sed. Try:

sed -i "s/my-images=/&$varname /" /home/myconfig

instead.

answered May 12, 2020 at 19:24

robinsax

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2 Comments

Siddharth Over a year ago

When I enter my input as testthat/version1 it throws me an error. Error is :: Hello,please add the new text here testthat/version1 sed: -e expression #1, char 38: unknown option to `s' How to pass raw input? I tried using read -r -p "Enter Input 'Enter the text >>>' varname @robinsax

robinsax Over a year ago

Without formatting I have no idea what that error is, but it's probably because the / makes the sed regex invalid. You'll need to escape /s prior to inserting them into the sed regex.

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