shpcentrd: 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/shpcentrd - from package: shapelib

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

On Debian possible default full paths are:

/usr/bin/shpcentrd - from package: shapelib

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

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