kumomergedb: 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/kumomergedb - from package: kumofs

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

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