axlisten: command not found

Have You tried accessing the binary with the full path?

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/bin/axlisten - from package: ax25-apps

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