subunit2pyunit: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/subunit2pyunit - from package: python-subunit

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

On Debian possible default full paths are:

/usr/bin/subunit2pyunit - from package: subunit

You may install the required package with command apt-get install {package}
Error in other languages:
subunit2pyunit: bevel nie gevind nie
subunit2pyunit: comandă negăsită
subunit2pyunit: comando não encontrado
subunit2pyunit: commande introuvable
subunit2pyunit: command not found
subunit2pyunit: käsku ei ole
subunit2pyunit: không tìm thấy lệnh
subunit2pyunit: komanda nerasta
subunit2pyunit: Kommando nicht gefunden.
subunit2pyunit: kommandot finns inte
subunit2pyunit: komut yok
subunit2pyunit: nie znaleziono polecenia
subunit2pyunit: níor aimsíodh an t-ordú
subunit2pyunit: no se encontró la orden
subunit2pyunit: no s'ha trobat l'ordre
subunit2pyunit: opdracht niet gevonden
subunit2pyunit: parancs nem található
subunit2pyunit: perintah tidak ditemukan
subunit2pyunit: príkaz nenájdený
subunit2pyunit: příkaz nenalezen
subunit2pyunit: команда не найдена
subunit2pyunit: командата не е открита
subunit2pyunit: 命令找不到
subunit2pyunit: コマンドが見つかりません