liveinst: 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/liveinst - from package: anaconda
/usr/sbin/liveinst - from package: anaconda

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

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