qcatool2: 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/qcatool2 - from package: qca2

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

On Debian possible default full paths are:

/usr/bin/qcatool2 - from package: qca2-utils

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

Error in other languages:
qcatool2: bevel nie gevind nie
qcatool2: comandă negăsită
qcatool2: comando não encontrado
qcatool2: commande introuvable
qcatool2: command not found
qcatool2: käsku ei ole
qcatool2: không tìm thấy lệnh
qcatool2: komanda nerasta
qcatool2: Kommando nicht gefunden.
qcatool2: kommandot finns inte
qcatool2: komut yok
qcatool2: nie znaleziono polecenia
qcatool2: níor aimsíodh an t-ordú
qcatool2: no se encontró la orden
qcatool2: no s'ha trobat l'ordre
qcatool2: opdracht niet gevonden
qcatool2: parancs nem található
qcatool2: perintah tidak ditemukan
qcatool2: príkaz nenájdený
qcatool2: příkaz nenalezen
qcatool2: команда не найдена
qcatool2: командата не е открита
qcatool2: 命令找不到
qcatool2: コマンドが見つかりません