karm: 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/karm - from package: kdepim

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

On Debian possible default full paths are:

/usr/bin/karm - from package: ktimetracker

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

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