sitesummary-upload: 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/sbin/sitesummary-upload - from package: sitesummary-client

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

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