flogin: 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/flogin - from package: rancid

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

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