ssplash: 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/ssplash - from package: splash

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

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