coccinella: 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

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/coccinella - from package: coccinella

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