frama-c: 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/frama-c - from package: frama-c-base

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

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