setupnash: 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/setupnash - from package: lrslib

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

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