amd2ldif: 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/sbin/amd2ldif - from package: am-utils

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

Error in other languages:
amd2ldif: bevel nie gevind nie
amd2ldif: comandă negăsită
amd2ldif: comando não encontrado
amd2ldif: commande introuvable
amd2ldif: command not found
amd2ldif: käsku ei ole
amd2ldif: không tìm thấy lệnh
amd2ldif: komanda nerasta
amd2ldif: Kommando nicht gefunden.
amd2ldif: kommandot finns inte
amd2ldif: komut yok
amd2ldif: nie znaleziono polecenia
amd2ldif: níor aimsíodh an t-ordú
amd2ldif: no se encontró la orden
amd2ldif: no s'ha trobat l'ordre
amd2ldif: opdracht niet gevonden
amd2ldif: parancs nem található
amd2ldif: perintah tidak ditemukan
amd2ldif: príkaz nenájdený
amd2ldif: příkaz nenalezen
amd2ldif: команда не найдена
amd2ldif: командата не е открита
amd2ldif: 命令找不到
amd2ldif: コマンドが見つかりません