wikipedia2text: 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/wikipedia2text - from package: wikipedia2text

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

Error in other languages:
wikipedia2text: bevel nie gevind nie
wikipedia2text: comandă negăsită
wikipedia2text: comando não encontrado
wikipedia2text: commande introuvable
wikipedia2text: command not found
wikipedia2text: käsku ei ole
wikipedia2text: không tìm thấy lệnh
wikipedia2text: komanda nerasta
wikipedia2text: Kommando nicht gefunden.
wikipedia2text: kommandot finns inte
wikipedia2text: komut yok
wikipedia2text: nie znaleziono polecenia
wikipedia2text: níor aimsíodh an t-ordú
wikipedia2text: no se encontró la orden
wikipedia2text: no s'ha trobat l'ordre
wikipedia2text: opdracht niet gevonden
wikipedia2text: parancs nem található
wikipedia2text: perintah tidak ditemukan
wikipedia2text: príkaz nenájdený
wikipedia2text: příkaz nenalezen
wikipedia2text: команда не найдена
wikipedia2text: командата не е открита
wikipedia2text: 命令找不到
wikipedia2text: コマンドが見つかりません