projectM-jack: 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/projectM-jack - from package: projectM-jack

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

On Debian possible default full paths are:

/usr/bin/projectM-jack - from package: projectM-jack

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

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