oarsub: 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/oarsub - from package: oar-user

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

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