Reading values from config file in linux

Question

I am working in linux and have a config file with a lot of single lines formatted like this:

Variable1=Value1
Variable2=Value2
Variable3=Value3

I need something I can run on command line that will echo the value for the respective variable. I have been playing with sed all day, but having a heck of a time. I'm not sure if that's even the best way. Any help would be super.

iamauser · Answer 1 · 2018-02-06T22:15:16.700

2

$ cat a.sh
Variable1=Value1
Variable2=Value2
Variable3=Value3 

$ source a.sh
$ echo "$Variable1"
Value1

Note, source will overwrite the value of Variable1 for the current shell.

edited Feb 06 '18 at 22:15

answered Feb 06 '18 at 22:08

iamauser

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Dangerous if you don't trust your values, of course. – Charles Duffy Feb 06 '18 at 22:12
simplest use source file is `. a.sh` – Дмитрий Шатов Feb 06 '18 at 22:22

score 1 · Answer 2 · answered Feb 06 '18 at 22:06

1

Search for the variable name and the equal sign, remove them, and print the result.

$ sed -n '/^Variable1=/{s/^Variable1=//;p}' config.txt
Value1

answered Feb 06 '18 at 22:06

Ignacio Vazquez-Abrams

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This would typically be simplified to `sed -n '/^Variable1=/s///p'` – William Pursell Feb 06 '18 at 22:12

Reading values from config file in linux

2 Answers2