rrancid: 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/rrancid - from package: rancid

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

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