pms: 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/pms - from package: pms

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

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