calendarjanitor: 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/calendarjanitor - from package: korganizer

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