clogin: 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/clogin - from package: rancid

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

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