linestipple: 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/lib64/piglit/bin/linestipple - from package: piglit

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

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