ldapaddgroup: 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/ldapaddgroup - from package: ldapscripts

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

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