psdots: 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/psdots - from package: tstools

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

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