weplab: 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/weplab - from package: weplab

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

On Debian possible default full paths are:

/usr/bin/weplab - from package: weplab

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

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