trayer: 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/trayer - from package: trayer

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

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