shpfix: 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/shpfix - from package: shapelib

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

On Debian possible default full paths are:

/usr/bin/shpfix - from package: shapelib

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

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