byobu-status-detail: 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/byobu-status-detail - from package: byobu

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

On Debian possible default full paths are:

/usr/bin/byobu-status-detail - from package: byobu

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

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