mount.wikipediafs: 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:

/sbin/mount.wikipediafs - from package: wikipediafs
/usr/bin/mount.wikipediafs - from package: wikipediafs

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

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