mha-dbrecover: 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/mha-dbrecover - from package: mhonarc

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

On Debian possible default full paths are:

/usr/bin/mha-dbrecover - from package: mhonarc

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

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