stairs9.lut: 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

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/lib/eso-midas/13SEP/systab/bin/stairs9.lut - from package: eso-midas

You may install the required package with command apt-get install {package}
Error in other languages:
stairs9.lut: bevel nie gevind nie
stairs9.lut: comandă negăsită
stairs9.lut: comando não encontrado
stairs9.lut: commande introuvable
stairs9.lut: command not found
stairs9.lut: käsku ei ole
stairs9.lut: không tìm thấy lệnh
stairs9.lut: komanda nerasta
stairs9.lut: Kommando nicht gefunden.
stairs9.lut: kommandot finns inte
stairs9.lut: komut yok
stairs9.lut: nie znaleziono polecenia
stairs9.lut: níor aimsíodh an t-ordú
stairs9.lut: no se encontró la orden
stairs9.lut: no s'ha trobat l'ordre
stairs9.lut: opdracht niet gevonden
stairs9.lut: parancs nem található
stairs9.lut: perintah tidak ditemukan
stairs9.lut: príkaz nenájdený
stairs9.lut: příkaz nenalezen
stairs9.lut: команда не найдена
stairs9.lut: командата не е открита
stairs9.lut: 命令找不到
stairs9.lut: コマンドが見つかりません