ldc2: 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/ldc2 - from package: ldc

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

Error in other languages:
ldc2: bevel nie gevind nie
ldc2: comandă negăsită
ldc2: comando não encontrado
ldc2: commande introuvable
ldc2: command not found
ldc2: käsku ei ole
ldc2: không tìm thấy lệnh
ldc2: komanda nerasta
ldc2: Kommando nicht gefunden.
ldc2: kommandot finns inte
ldc2: komut yok
ldc2: nie znaleziono polecenia
ldc2: níor aimsíodh an t-ordú
ldc2: no se encontró la orden
ldc2: no s'ha trobat l'ordre
ldc2: opdracht niet gevonden
ldc2: parancs nem található
ldc2: perintah tidak ditemukan
ldc2: príkaz nenájdený
ldc2: příkaz nenalezen
ldc2: команда не найдена
ldc2: командата не е открита
ldc2: 命令找不到
ldc2: コマンドが見つかりません