ascd: command not found

Have You tried accessing the binary with the full path?

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/ascd - from package: ascd

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