WebSearch: 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 Debian possible default full paths are:

/usr/bin/WebSearch - from package: libwww-search-perl

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

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