patmatdb: 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/patmatdb - from package: emboss

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

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