glm: 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/lib/cmtk/bin/glm - from package: cmtk

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

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