quakestat: 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/quakestat - from package: qstat

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

On Debian possible default full paths are:

/usr/bin/quakestat - from package: qstat

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

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