distmat: 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/distmat - from package: emboss

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

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