lxc-config: 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/lxc-config - from package: lxc

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

On Debian possible default full paths are:

/usr/bin/lxc-config - from package: lxc

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

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