cnrun: 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/cnrun - from package: cnrun

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

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