nepomuk2-rcgen: 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/nepomuk2-rcgen - from package: nepomuk-core-runtime

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

Error in other languages:
nepomuk2-rcgen: bevel nie gevind nie
nepomuk2-rcgen: comandă negăsită
nepomuk2-rcgen: comando não encontrado
nepomuk2-rcgen: commande introuvable
nepomuk2-rcgen: command not found
nepomuk2-rcgen: käsku ei ole
nepomuk2-rcgen: không tìm thấy lệnh
nepomuk2-rcgen: komanda nerasta
nepomuk2-rcgen: Kommando nicht gefunden.
nepomuk2-rcgen: kommandot finns inte
nepomuk2-rcgen: komut yok
nepomuk2-rcgen: nie znaleziono polecenia
nepomuk2-rcgen: níor aimsíodh an t-ordú
nepomuk2-rcgen: no se encontró la orden
nepomuk2-rcgen: no s'ha trobat l'ordre
nepomuk2-rcgen: opdracht niet gevonden
nepomuk2-rcgen: parancs nem található
nepomuk2-rcgen: perintah tidak ditemukan
nepomuk2-rcgen: príkaz nenájdený
nepomuk2-rcgen: příkaz nenalezen
nepomuk2-rcgen: команда не найдена
nepomuk2-rcgen: командата не е открита
nepomuk2-rcgen: 命令找不到
nepomuk2-rcgen: コマンドが見つかりません