nsplash: 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/nsplash - from package: splash

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

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