geisview: 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/geisview - from package: geis-tools

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

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