install-keymap: 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/sbin/install-keymap - from package: console-common

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

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