glfer: 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
/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/glfer - from package: glfer

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