marclint: 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/marclint - from package: libmarc-lint-perl

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

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