qsub-ge: 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/qsub-ge - from package: gridengine

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

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