uuwish: 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/uuwish - from package: xdeview

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

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