nepomukcmd: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/nepomukcmd - from package: nepomuk-core-runtime

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