mtrancid: 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/mtrancid - from package: rancid

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

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