nqs2pbs: 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/nqs2pbs - from package: torque-client

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

Error in other languages:
nqs2pbs: bevel nie gevind nie
nqs2pbs: comandă negăsită
nqs2pbs: comando não encontrado
nqs2pbs: commande introuvable
nqs2pbs: command not found
nqs2pbs: käsku ei ole
nqs2pbs: không tìm thấy lệnh
nqs2pbs: komanda nerasta
nqs2pbs: Kommando nicht gefunden.
nqs2pbs: kommandot finns inte
nqs2pbs: komut yok
nqs2pbs: nie znaleziono polecenia
nqs2pbs: níor aimsíodh an t-ordú
nqs2pbs: no se encontró la orden
nqs2pbs: no s'ha trobat l'ordre
nqs2pbs: opdracht niet gevonden
nqs2pbs: parancs nem található
nqs2pbs: perintah tidak ditemukan
nqs2pbs: príkaz nenájdený
nqs2pbs: příkaz nenalezen
nqs2pbs: команда не найдена
nqs2pbs: командата не е открита
nqs2pbs: 命令找不到
nqs2pbs: コマンドが見つかりません