abrt-harvest-vmcore: 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/sbin/abrt-harvest-vmcore - from package: abrt-addon-vmcore

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

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