linpsk: 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/linpsk - from package: linpsk

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

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