remove-ds: 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/remove-ds - from package: 389-ds-base

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

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