s2cc: 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/s2cc - from package: scheme2c

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

Error in other languages:
s2cc: bevel nie gevind nie
s2cc: comandă negăsită
s2cc: comando não encontrado
s2cc: commande introuvable
s2cc: command not found
s2cc: käsku ei ole
s2cc: không tìm thấy lệnh
s2cc: komanda nerasta
s2cc: Kommando nicht gefunden.
s2cc: kommandot finns inte
s2cc: komut yok
s2cc: nie znaleziono polecenia
s2cc: níor aimsíodh an t-ordú
s2cc: no se encontró la orden
s2cc: no s'ha trobat l'ordre
s2cc: opdracht niet gevonden
s2cc: parancs nem található
s2cc: perintah tidak ditemukan
s2cc: príkaz nenájdený
s2cc: příkaz nenalezen
s2cc: команда не найдена
s2cc: командата не е открита
s2cc: 命令找不到
s2cc: コマンドが見つかりません