dmtcp_ssh: 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_ssh - from package: dmtcp

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

On Debian possible default full paths are:

/usr/bin/dmtcp_ssh - from package: dmtcp

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

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