hedgewars-server: 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/lib/hedgewars/bin/hedgewars-server - from package: hedgewars

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

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