clif: 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/bin/clif - from package: clif

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

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