subunit-filter: 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/subunit-filter - from package: python-subunit

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

On Debian possible default full paths are:

/usr/bin/subunit-filter - from package: subunit

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