kolabadmin: 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 Debian possible default full paths are:

/usr/bin/kolabadmin - from package: kolabadmin

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

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