cssrancid: 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/cssrancid - from package: rancid

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

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