debci-generate-index: 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/share/debci/bin/debci-generate-index - from package: debci

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

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