rpcserver.h: 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/include/cxxtools/bin/rpcserver.h - from package: libcxxtools-dev

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