red_hat.txt

======
RedHat
======

RHEL subscription::

    sudo subscription-manager register 
    sudo subscription-manager attach
    sudo yum update


YUM::

    yum update              # update packets
        install <packet>    # install packet
            -y              # yes for all ansvers
        search <packet>     # search packet
        info htop           # show info


yum install epel-release
yum install htop


===============
CentOS yum
===============

yum install epel-release
yum install htop


CentOS yum via proxy::

    /etc/yum.conf.
        proxy=http://192.168.35.10:8080
        proxy_username=proxyname
        proxy_password=proxypass

===============
RedHat firewall
===============

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Security_Guide/sec-Using_Firewalls.html

# start/stop firewall
sudo systemctl disable firewalld
sudo systemctl stop firewalld
sudo systemctl status firewalld


cat /etc/redhat-release	# show version of redhat	

ip addr					# analog ifconfig'a
yum install net-tools	# install ifconfig


# start/stop firewall
sudo systemctl disable firewalld
sudo systemctl stop firewalld
sudo systemctl status firewalld


# Change timezone
sudo mv /etc/localtime /etc/localtime.old
sudo ln -s /usr/share/zoneinfo/Europe/Kiev /etc/localtime


# login at another user
su - <username>