rnano: 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:

/bin/rnano - from package: nano
/usr/bin/rnano - from package: nano

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

On Debian possible default full paths are:

/bin/rnano - from package: nano

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

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