x86info: 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/sbin/x86info - from package: x86info

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

On Debian possible default full paths are:

/usr/bin/x86info - from package: x86info

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

Error in other languages:
x86info: bevel nie gevind nie
x86info: comandă negăsită
x86info: comando não encontrado
x86info: commande introuvable
x86info: command not found
x86info: käsku ei ole
x86info: không tìm thấy lệnh
x86info: komanda nerasta
x86info: Kommando nicht gefunden.
x86info: kommandot finns inte
x86info: komut yok
x86info: nie znaleziono polecenia
x86info: níor aimsíodh an t-ordú
x86info: no se encontró la orden
x86info: no s'ha trobat l'ordre
x86info: opdracht niet gevonden
x86info: parancs nem található
x86info: perintah tidak ditemukan
x86info: príkaz nenájdený
x86info: příkaz nenalezen
x86info: команда не найдена
x86info: командата не е открита
x86info: 命令找不到
x86info: コマンドが見つかりません