heimtools: 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/heimtools - from package: heimdal-workstation

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

On Debian possible default full paths are:

/usr/bin/heimtools - from package: heimdal-clients

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

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