cliquer: command not found

Have You tried accessing the binary with the full path?

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/cliquer - from package: cliquer

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