`g++` commands isn't working and APT is reporting `g++` is installed

Question

I installed Ubuntu 20.04 and I installed g++ using

sudo apt install g++ 
sudo apt install build-essential

but when I want to check the version using this command

g++ --version

it showed me and also for gcc same the situation

Command 'g++' not found, but can be installed with:
sudo apt install g++

Is there any way to check whether the g++ installed or not?

Run sudo apt update and then sudo apt install g++ again. Please add any error messages to the question by editing it. — N0rbert, Jul 16 '20 at 14:57
Did you remove some files manually? Try running sudo apt install --reinstall gcc g++. Retry your actions. — Kulfy, Jul 16 '20 at 15:32
Yes. sudo apt install --reinstall gcc g++ solves my problem, many thanks Kulfy — John, Jul 16 '20 at 15:35
@John Is this really a duplicate of How do I restore the default repositories?, then? As far as I can tell, the solution that actually worked for you--reinstalling the package--is not presented there and would not make sense there. — Eliah Kagan, Jul 16 '20 at 16:00

score 0 · Answer 1 · answered Jul 16 '20 at 15:35

0

Steps you can try:

If you want to know if the package installed, check out this answer.

answered Jul 16 '20 at 15:35

ahmedg

sudo apt install --reinstall gcc g++ solves my problem, many thanks Kulfy – John Jul 16 '20 at 15:37
@John Nice to hear it! – ahmedg Jul 16 '20 at 15:38

score 0 · Answer 2 · answered Jul 17 '20 at 16:27

0

Yes you can check installed tools via this command :

sudo apt list --installed

In your case, "g++" is not installed. Try updating the repositories before installing via these commands :

sudo apt-get update -y && sudo apt-get install g++ -y

answered Jul 17 '20 at 16:27