osmosis: 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/osmosis - from package: osmosis

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

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