mdb-tables: 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/mdb-tables - from package: mdbtools

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

On Debian possible default full paths are:

/usr/bin/mdb-tables - from package: mdbtools

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

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