kissattach: 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 Debian possible default full paths are:

/usr/sbin/kissattach - from package: ax25-tools

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

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