ldif2ldap: 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/sbin/ldif2ldap - from package: 389-ds-base

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

Error in other languages:
ldif2ldap: bevel nie gevind nie
ldif2ldap: comandă negăsită
ldif2ldap: comando não encontrado
ldif2ldap: commande introuvable
ldif2ldap: command not found
ldif2ldap: käsku ei ole
ldif2ldap: không tìm thấy lệnh
ldif2ldap: komanda nerasta
ldif2ldap: Kommando nicht gefunden.
ldif2ldap: kommandot finns inte
ldif2ldap: komut yok
ldif2ldap: nie znaleziono polecenia
ldif2ldap: níor aimsíodh an t-ordú
ldif2ldap: no se encontró la orden
ldif2ldap: no s'ha trobat l'ordre
ldif2ldap: opdracht niet gevonden
ldif2ldap: parancs nem található
ldif2ldap: perintah tidak ditemukan
ldif2ldap: príkaz nenájdený
ldif2ldap: příkaz nenalezen
ldif2ldap: команда не найдена
ldif2ldap: командата не е открита
ldif2ldap: 命令找不到
ldif2ldap: コマンドが見つかりません