cppunit-config: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/cppunit-config - from package: cppunit-devel

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/cppunit-config - from package: libcppunit-dev

You may install the required package with command apt-get install {package}

Error in other languages:
cppunit-config: bevel nie gevind nie
cppunit-config: comandă negăsită
cppunit-config: comando não encontrado
cppunit-config: commande introuvable
cppunit-config: command not found
cppunit-config: käsku ei ole
cppunit-config: không tìm thấy lệnh
cppunit-config: komanda nerasta
cppunit-config: Kommando nicht gefunden.
cppunit-config: kommandot finns inte
cppunit-config: komut yok
cppunit-config: nie znaleziono polecenia
cppunit-config: níor aimsíodh an t-ordú
cppunit-config: no se encontró la orden
cppunit-config: no s'ha trobat l'ordre
cppunit-config: opdracht niet gevonden
cppunit-config: parancs nem található
cppunit-config: perintah tidak ditemukan
cppunit-config: príkaz nenájdený
cppunit-config: příkaz nenalezen
cppunit-config: команда не найдена
cppunit-config: командата не е открита
cppunit-config: 命令找不到
cppunit-config: コマンドが見つかりません