kronolith-agenda: 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 CentOS possible default full paths are:

/usr/bin/kronolith-agenda - from package: php-horde-kronolith

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/kronolith-agenda - from package: php-horde-kronolith

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

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