anki: 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/anki - from package: anki

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