rsplash: 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/rsplash - from package: splash

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

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