inxi: 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/inxi - from package: inxi

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

On Debian possible default full paths are:

/usr/bin/inxi - from package: inxi

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

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