xfview: 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/xfview - from package: xfe

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

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