pasystray: 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/pasystray - from package: pasystray

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

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