get_interps: 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

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/get_interps - from package: ladr4-apps

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