nsrancid: 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/nsrancid - from package: rancid

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

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