iceboxadmin: 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/iceboxadmin - from package: icebox

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

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