sccs: 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/sccs - from package: cssc

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

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