kwalify: 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/kwalify - from package: rubygem-kwalify
/usr/lib/ruby/gems/1.8/gems/kwalify-0.7.2/bin/kwalify - from package: rubygem-kwalify

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

On Debian possible default full paths are:

/usr/bin/kwalify - from package: kwalify

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

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