cqtest: 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/sbin/cqtest - from package: hylafax+

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

On Debian possible default full paths are:

/usr/sbin/cqtest - from package: hylafax-server

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

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