corona: 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/corona - from package: libcorona-perl

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