spyder: 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/spyder - from package: spyder

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

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