nrancid: 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/lib/rancid/bin/nrancid - from package: rancid

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

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