attic: 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/attic - from package: attic

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