mvnDebug: 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 Debian possible default full paths are:

/usr/share/maven2/bin/mvnDebug - from package: maven2
/usr/share/maven/bin/mvnDebug - from package: maven

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

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