guymager: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/guymager - from package: guymager

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