qiv: 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 CentOS possible default full paths are:

/usr/bin/qiv - from package: qiv

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/qiv - from package: qiv

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

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