qresub: 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/qresub - from package: gridengine
/usr/share/gridengine/bin/lx26-amd64/qresub - from package: gridengine
/usr/share/gridengine/bin/lx26-x86/qresub - from package: gridengine

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

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