linux – How to install valgrind properly?

Short answer: Make from source.

How?

apt-get --purge valgrind
or
dpkg --remove valgrind
or
yum remove valgrind

Obtain sources from here.
Identify the latest version (for example 3.17.0)
Download sources : wget https://sourceware.org/pub/valgrind/valgrind-3.17.0.tar.bz2
Decompress archive tar xvf valgrind-3.17.0.tar.bz2
Go to uncompressed archive cd valgrind-3.17.0
Configure ./configure
Compile make
Install make install (with root rights, eg. sudo)

Note: very useful for Raspberry Pi 4 users – Default valgrind installation generate a lot of internal errors. See Valgrind reports hundreds of errors in Hello World program on RaspberryPi 4B

All major linux distributions will include valgrind in their repositories. You can find this on debian derived, apt based systems with:

apt search valgrind

But first just try:

apt install valgrind

It should work, and pull in any dependencies. Remember, if you are not the superuser, youll need to preface those with sudo.

Its a great tool, have fun.

i think its due to dependency not met.
install g++
by

sudo apt-get install g++

then try again.
error is due to exec is unable to find any package named g++