sudo adduser userName
sudo visudo
sudo vim /etc/profile.d/proxy.sh
MY_PROXY_URL="http://prox.srv.world:3128" HTTP_PROXY=$MY_PROXY_URL HTTPS_PROXY=$MY_PROXY_URL FTP_PROXY=$MY_PROXY_URL http_proxy=$MY_PROXY_URL https_proxy=$MY_PROXY_URL ftp_proxy=$MY_PROXY_URL export HTTP_PROXY HTTPS_PROXY FTP_PROXY http_proxy https_proxy ftp_proxy
source /etc/profile.d/proxy.sh
sudo vi /etc/sysctl.conf
net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1
sudo sysctl -p
sudo apt update
sudo apt upgrade
sudo apt -y install clamav ntp vim ssh net-tools iftop iotop sysstat