slapos: 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
/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/slapos - from package: slapos-client

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