RHEL 7 supports Docker containers, systemd, Microsoft-compatible ID management, and XFS for 500TB filesystems

RHEL 7 now uses the xfs file system instead of ext4 by default

#subscription-manager list

kernel code name – Maipo

[root@ovi ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.1 (Maipo)

kernel version

[root@ovi ~]# uname -r
3.10.0-229.el7.x86_64

For RHEL 7, the systemctl command replaces service and chkconfig

#systemctl -t service –state=active

Check if service is enabled

systemctl is-enabled httpd

#systemctl is-enabled httpd
enabled

View run level

[root@ovi ~]# systemctl get-default
multi-user.target

or

[root@ovi ~]# who -r
run-level 3 2015-12-10 03:47

Change the hostname:

#hostnamectl set-hostname hostname

#hostnamectl set-hostname ovi

Configure network interface

/etc/sysconfig/network-scripts/ifcfg-*

nmcli
nmcli – command‐line tool for controlling NetworkManager
nmcli con [add|mod|edit]

nmtui

nmtui – Text User Interface for controlling NetworkManager

nm-connection-editor

View network interface info

ip addr

nmcli dev show

teamdctl
teamdctl — team daemon control tool

brctl

bridge

#bridge
Usage: bridge [ OPTIONS ] OBJECT { COMMAND | help }
where OBJECT := { link | fdb | mdb | vlan | monitor }
OPTIONS := { -V[ersion] | -s[tatistics] | -d[etails] |
-o[neline] | -t[imestamp]

Install apache on Red Hat 7

# yum install httpd -y

# systemctl start httpd.service

to verify if httpd service is running use below command:

# systemctl is-active httpd.service

active

Displaying service status

MariaDB is the default implementation of MySQL in Red Hat Enterprise Linux 7

Install mariadb

yum install mariadb mariadb-server -y

mysql -V
mysql Ver 15.1 Distrib 5.5.44-MariaDB, for Linux (x86_64) using readline 5.

# systemctl enable mariadb.service

ln -s ‘/usr/lib/systemd/system/mariadb.service’ ‘/etc/systemd/system/multi-user.target.wants/mariadb.service’

check if mariadb service is enable

systemctl is-enabled mariadb
enabled

# systemctl start mariadb.service

to verify if service is  running

#systemctl is-active mariadb.service
active

Start the MongoDB service and configure it to start when the system boots:

# systemctl enable mongod.service
# systemctl start mongod.service