p4v: 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/p4v - from package: p4vasp

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

Error in other languages:
p4v: bevel nie gevind nie
p4v: comandă negăsită
p4v: comando não encontrado
p4v: commande introuvable
p4v: command not found
p4v: käsku ei ole
p4v: không tìm thấy lệnh
p4v: komanda nerasta
p4v: Kommando nicht gefunden.
p4v: kommandot finns inte
p4v: komut yok
p4v: nie znaleziono polecenia
p4v: níor aimsíodh an t-ordú
p4v: no se encontró la orden
p4v: no s'ha trobat l'ordre
p4v: opdracht niet gevonden
p4v: parancs nem található
p4v: perintah tidak ditemukan
p4v: príkaz nenájdený
p4v: příkaz nenalezen
p4v: команда не найдена
p4v: командата не е открита
p4v: 命令找不到
p4v: コマンドが見つかりません