latfilter: 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/bin/latfilter - from package: ladr4-apps

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

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