pt: 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 CentOS possible default full paths are:

/var/spool/hylafax/bin/dict/pt - from package: hylafax+

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/pt - from package: tcllib

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

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