s9soccat: 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/s9soccat - from package: scheme9

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

Error in other languages:
s9soccat: bevel nie gevind nie
s9soccat: comandă negăsită
s9soccat: comando não encontrado
s9soccat: commande introuvable
s9soccat: command not found
s9soccat: käsku ei ole
s9soccat: không tìm thấy lệnh
s9soccat: komanda nerasta
s9soccat: Kommando nicht gefunden.
s9soccat: kommandot finns inte
s9soccat: komut yok
s9soccat: nie znaleziono polecenia
s9soccat: níor aimsíodh an t-ordú
s9soccat: no se encontró la orden
s9soccat: no s'ha trobat l'ordre
s9soccat: opdracht niet gevonden
s9soccat: parancs nem található
s9soccat: perintah tidak ditemukan
s9soccat: príkaz nenájdený
s9soccat: příkaz nenalezen
s9soccat: команда не найдена
s9soccat: командата не е открита
s9soccat: 命令找不到
s9soccat: コマンドが見つかりません