screenie: command not found

Have You tried accessing the binary with the full path?

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/screenie - from package: screenie

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