kmk_cat: 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/kmk_cat - from package: kBuild

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

On Debian possible default full paths are:

/usr/bin/kmk_cat - from package: kBuild

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

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