dmtcp_nocheckpoint: 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/dmtcp_nocheckpoint - from package: dmtcp

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

On Debian possible default full paths are:

/usr/bin/dmtcp_nocheckpoint - from package: dmtcp

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

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