espeakup: 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/espeakup - from package: espeakup

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

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