gmk_msh: 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/gmk_msh - from package: scotch

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

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