coquelicot: 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/coquelicot - from package: coquelicot

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

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