sapserver: 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/bin/sapserver - from package: minisapserver

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