pserve: 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 CentOS possible default full paths are:

/usr/bin/pserve - from package: python-pyramid

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/pserve - from package: python-pyramid

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

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