plowlist: 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/plowlist - from package: plowshare

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

On Debian possible default full paths are:

/usr/bin/plowlist - from package: plowshare4

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

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