gpicview: 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/gpicview - from package: gpicview

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

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