ckbcomp: 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/ckbcomp - from package: console-setup-mini
/usr/bin/ckbcomp - from package: console-setup

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

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