rootv: 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/rootv - from package: xawtv

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

On Debian possible default full paths are:

/usr/bin/rootv - from package: xawtv

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

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