i1401: 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/i1401 - from package: simh

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

Error in other languages:
i1401: bevel nie gevind nie
i1401: comandă negăsită
i1401: comando não encontrado
i1401: commande introuvable
i1401: command not found
i1401: käsku ei ole
i1401: không tìm thấy lệnh
i1401: komanda nerasta
i1401: Kommando nicht gefunden.
i1401: kommandot finns inte
i1401: komut yok
i1401: nie znaleziono polecenia
i1401: níor aimsíodh an t-ordú
i1401: no se encontró la orden
i1401: no s'ha trobat l'ordre
i1401: opdracht niet gevonden
i1401: parancs nem található
i1401: perintah tidak ditemukan
i1401: príkaz nenájdený
i1401: příkaz nenalezen
i1401: команда не найдена
i1401: командата не е открита
i1401: 命令找不到
i1401: コマンドが見つかりません