zipalign: 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/zipalign - from package: zipalign

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

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