scotch_gmk_m2: 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 CentOS possible default full paths are:

/usr/bin/scotch_gmk_m2 - from package: scotch

You may install the required package with command yum install {package}

Error in other languages:
scotch_gmk_m2: bevel nie gevind nie
scotch_gmk_m2: comandă negăsită
scotch_gmk_m2: comando não encontrado
scotch_gmk_m2: commande introuvable
scotch_gmk_m2: command not found
scotch_gmk_m2: käsku ei ole
scotch_gmk_m2: không tìm thấy lệnh
scotch_gmk_m2: komanda nerasta
scotch_gmk_m2: Kommando nicht gefunden.
scotch_gmk_m2: kommandot finns inte
scotch_gmk_m2: komut yok
scotch_gmk_m2: nie znaleziono polecenia
scotch_gmk_m2: níor aimsíodh an t-ordú
scotch_gmk_m2: no se encontró la orden
scotch_gmk_m2: no s'ha trobat l'ordre
scotch_gmk_m2: opdracht niet gevonden
scotch_gmk_m2: parancs nem található
scotch_gmk_m2: perintah tidak ditemukan
scotch_gmk_m2: príkaz nenájdený
scotch_gmk_m2: příkaz nenalezen
scotch_gmk_m2: команда не найдена
scotch_gmk_m2: командата не е открита
scotch_gmk_m2: 命令找不到
scotch_gmk_m2: コマンドが見つかりません