konsolekalendar: 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 CentOS possible default full paths are:

/usr/bin/konsolekalendar - from package: kdepim

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

On Debian possible default full paths are:

/usr/bin/konsolekalendar - from package: konsolekalendar

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