nemiver: 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/nemiver - from package: nemiver

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

On Debian possible default full paths are:

/usr/bin/nemiver - from package: nemiver

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

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