nepomukstorage: 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/nepomukstorage - from package: nepomuk-core-runtime

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

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