virt-inspector2: 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/virt-inspector2 - from package: libguestfs-tools-c

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

Error in other languages:
virt-inspector2: bevel nie gevind nie
virt-inspector2: comandă negăsită
virt-inspector2: comando não encontrado
virt-inspector2: commande introuvable
virt-inspector2: command not found
virt-inspector2: käsku ei ole
virt-inspector2: không tìm thấy lệnh
virt-inspector2: komanda nerasta
virt-inspector2: Kommando nicht gefunden.
virt-inspector2: kommandot finns inte
virt-inspector2: komut yok
virt-inspector2: nie znaleziono polecenia
virt-inspector2: níor aimsíodh an t-ordú
virt-inspector2: no se encontró la orden
virt-inspector2: no s'ha trobat l'ordre
virt-inspector2: opdracht niet gevonden
virt-inspector2: parancs nem található
virt-inspector2: perintah tidak ditemukan
virt-inspector2: príkaz nenájdený
virt-inspector2: příkaz nenalezen
virt-inspector2: команда не найдена
virt-inspector2: командата не е открита
virt-inspector2: 命令找不到
virt-inspector2: コマンドが見つかりません