glam2mask: 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/glam2mask - from package: glam2

You may install the required package with command apt-get install {package}
Error in other languages:
glam2mask: bevel nie gevind nie
glam2mask: comandă negăsită
glam2mask: comando não encontrado
glam2mask: commande introuvable
glam2mask: command not found
glam2mask: käsku ei ole
glam2mask: không tìm thấy lệnh
glam2mask: komanda nerasta
glam2mask: Kommando nicht gefunden.
glam2mask: kommandot finns inte
glam2mask: komut yok
glam2mask: nie znaleziono polecenia
glam2mask: níor aimsíodh an t-ordú
glam2mask: no se encontró la orden
glam2mask: no s'ha trobat l'ordre
glam2mask: opdracht niet gevonden
glam2mask: parancs nem található
glam2mask: perintah tidak ditemukan
glam2mask: príkaz nenájdený
glam2mask: příkaz nenalezen
glam2mask: команда не найдена
glam2mask: командата не е открита
glam2mask: 命令找不到
glam2mask: コマンドが見つかりません