qchkpt: 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/qchkpt - from package: torque-client

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

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