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Docker installation on RHEL 7

Objective

The objective is to install Docker engine on Redhat 7 Linux using native docker script.

Requirements

Internet connection as well as a privileged access to your Redhat 7 Linux is required.

Difficulty

EASY

Conventions # – requires given command to be executed with root privileges either directly as a root user or by use […]

Forgot SYS password in oracle 11g

su – oracle

sqlplus /nolog connect / as sysdba

show user

Once connected, you can change the SYS password to something you know: ALTER USER sys IDENTIFIED BY new_password;

 

 

CentOS 6.9 Docker

CentOS 6.9 Docker

public key

rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org

ELRepo Centos6?

rpm -Uvh http://www.elrepo.org/elrepo-release-6-6.el6.elrepo.noarch.rpm

Cenos7?

rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm (external link)

kernel

yum –enablerepo=elrepo-kernel install -y kernel-lt

yum –enablerepo=elrepo-kernel install -y kernel-ml

vi /etc/grub.conf

default

# grub.conf generated by anaconda # default=0 timeout=5 splashimage=(hd0,0)/boot/grub/splash.xpm.gz hiddenmenu title CentOS (3.10.28-1.el6.elrepo.x86_64) root (hd0,0) kernel /boot/vmlinuz-3.10.28-1.el6.elrepo.x86_64 ro root=UUID=0a05411f-16f2-4d69-beb0-2db4cefd3613 rd_NO_LUKS KEYBOARDTYPE=pc KEYTABLE=us […]

weblogic 12c

WebLogic Server 12c (12.1.1)

http://www.oracle.com/technetwork/middleware/weblogic/downloads/wls-main-097127.html

Installers with Oracle WebLogic Server and Oracle Coherence:?Generic (997 MB)

wls1211_generic.jar

java -jar wls1211_generic.jar

java -jar wls1211_generic.jar -mode=console

java -jar wls1211_generic.jar -log=D:\wlog\wsl_install.log

Enter username to boot WebLogic server:weblogic Enter password to boot WebLogic server:

home/weblogic_12c/user_projects/domains/base_domain/servers/AdminServer/security boot.properties

username=weblogic password=weblogic

nohup ./startWebLogic.sh

Install Gnome GUI on CentOS 7 / RHEL 7

Install Gnome GUI on CentOS 7 / RHEL 7

Linux admins spend most of their time on working in a terminal; there are some who like to work on GUI instead of a terminal. By default, CentOS 7 installed as the minimal server, and user intervention is required to change the installation type. This […]

Performance Co-Pilot (PCP) on my RHEL server to capture performance logs

# run these commands on a Centos 7 server as root yum install -y pcp pcp-webapi pcp-system-tools chkconfig pmcd on service pmcd start chkconfig pmlogger on service pmlogger start chkconfig pmwebd on service pmwebd start # open port 44323 in the firewall # To start vector on your laptop docker run -d –name vector […]

“This system is not registered to Red Hat Subscription Management. You can use subscription-manager to register.”

two solutions

in the plugin configuration file disable plugin

vim /etc/yum/pluginconf.d/subscription-manager.conf

enabled=0 or register to the satellite

ps command #1 – Basic

A linux command to monitor the system process consuming resources on the server. If you are working on a linux system it is good to have at least basic understanding of this command.

ps program or command when run take a snapshot of running processes at that time and display on the terminal which can […]

memory usage in Linux per process

Not because I really want to; but because I just don’t have the money to spend on a 2+ GB RAM VPS and I would like to run Jira.

In order to do this I keep a close eye on the processes running and how much memory each takes.

For this I found […]

Top Show Running Processes

he Linux top command is used to show all the running processes within your Linux environment. This guide shows you how to use the top command by explaining the different switches available and the information that is displayed:

How To Run The Top Command

In its basic form all you need to do to show […]