shpcreate: 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/shpcreate - from package: shapelib

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

On Debian possible default full paths are:

/usr/bin/shpcreate - from package: shapelib

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

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