will_cpp_segfault: 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/will_cpp_segfault - from package: will-crash

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

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