owpresent: 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

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/owpresent - from package: ow-shell

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