screenlets-manager: 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/screenlets-manager - from package: screenlets

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

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