mysqldbexport: 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/mysqldbexport - from package: mysql-utilities

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

On Debian possible default full paths are:

/usr/bin/mysqldbexport - from package: mysql-utilities

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

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