build-lives-rfx-plugin: 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 Debian possible default full paths are:

/usr/bin/build-lives-rfx-plugin - from package: lives-plugins

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

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