linkmap: 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/linkmap - from package: fastlink

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

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