nautilus-sendto: 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 CentOS possible default full paths are:

/usr/bin/nautilus-sendto - from package: nautilus-sendto

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/nautilus-sendto - from package: nautilus-sendto

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

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