pts-subscribe: 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/pts-subscribe - from package: devscripts

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

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