httpserv: 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/httpserv - from package: libnss3-tools

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

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