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

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

On Debian possible default full paths are:

/usr/bin/qhold - from package: slurm-wlm-torque

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

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