osx: 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 CentOS possible default full paths are:

/usr/bin/osx - from package: opensp

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/osx - from package: opensp

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

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