marcdump: 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/bin/marcdump - from package: libmarc-record-perl

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

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