jrancid: 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/jrancid - from package: rancid

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

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