qserverd: command not found

Have You tried accessing the binary with the full path?

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/sbin/qserverd - from package: torque-server

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