How To Install Docker on Oracle Linux Server 9

 
Docker is a container engine that uses the Linux Kernel to create the containers on top of an operating system. Which is used to create, deploy and run the applications.
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Server - Os:  Oracle Linux Server 9.0   64Bit      | IP -192.168.1.50        |Hostname - server.testbox.com
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cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo
sudo dnf update
sudo dnf install -y docker-ce docker-ce-cli containerd.io
docker --version
sudo systemctl enable docker ; sudo systemctl start docker ; sudo systemctl status docker
sudo usermod -aG docker yourname
id testbox
docker run hello-world
docker pull ubuntu
docker images
docker run -it ubuntu
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Configure Storage Server with iSCSI.

 in This Tutorial you will Learn " How To Configure Storage Server with iSCSI On Oracle Linux 9
Configure Storage Server with iSCSI.
Storage server with iSCSI on network is called iSCSI Target, Client Host that connects to iSCSI Target is called iSCSI Initiator.
+----------------------+          |          +----------------------+
| [   iSCSI Target   ] |192.168.1.50 | 192.168.1.40| [ iSCSI Initiator  ] |
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Server - Os:  Oracle Linux Server 9.0   64Bit      | IP -192.168.1.50        |Hostname - server.testbox.com
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Configure iSCSI Target (Targetcli) -  

cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf -y install targetcli
mkdir /var/lib/iscsi_disks
targetcli
cd backstores/fileio
create disk01 /var/lib/iscsi_disks/disk01.img 10G
cd /iscsi
create iqn.2023-03.server.testbox:dlp.target01
cd iqn.2023-03.server.testbox:dlp.target01/tpg1/luns
create /backstores/fileio/disk01
cd ../acls
create iqn.2023-03.server.testbox:node01.initiator01
cd iqn.2023-03.server.testbox:node01.initiator01
set auth userid=username
set auth password=password
exit
ss -napt | grep 3260
systemctl enable target
firewall-cmd --add-service=iscsi-target ; firewall-cmd --runtime-to-permanent
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Configure iSCSI Initiator  -
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cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf -y install iscsi-initiator-utils
nano /etc/iscsi/initiatorname.iscsi
InitiatorName=iqn.2023-03.server.testbox:node01.initiator01

nano /etc/iscsi/iscsid.conf
node.session.auth.authmethod = CHAP
node.session.auth.username = username
node.session.auth.password = password

iscsiadm -m discovery -t sendtargets -p 192.168.1.50                   
iscsiadm -m node -o show
systemctl restart iscsid
iscsiadm -m node --login
iscsiadm -m session -o show
cat /proc/partitions

parted --script /dev/sdc "mklabel gpt"
parted --script /dev/sdc "mkpart primary 0% 100%"
mkfs.xfs -i size=1024 -s size=4096 /dev/sdc1
mount /dev/sdc1 /mnt
df -hT
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Create SSL Certificate (Self Signed)

 in This Tutorial you will Learn" How To Create SSL Certificate (Self Signed) On Oracle Linux 9"

SSL stands for Secure Sockets Layer, a global standard security technology that enables encrypted communication between a web browser and a web server.
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Server - Os:  Oracle Linux Server 9   64Bit      | IP -192.168.1.50        |Hostname - server.testbox.com
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cat /etc/system-release ; dnf groupinstall "Development Tools" -y
cd /etc/pki/tls/certs
openssl genrsa -aes128 2048 > server.key
openssl rsa -in server.key -out server.key
openssl req -utf8 -new -key server.key -out server.csr
openssl x509 -in server.csr -out server.crt -req -signkey server.key -days 3650
chmod 600 server.key
ll server.*
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Linux NFS Server: How to Set Up Server and Client On Oracle Linux 9

 Network File System (NFS) is a networking protocol for distributed file sharing.    
Configure NFS Client to mount NFS Share on NFS Client.  || This example is based on the environment like follows.
+----------------------+          |          +----------------------+
| [    NFS Server    ] |192.168.1.40 | 192.168.1.50| [    NFS Client    ] |
|    server.second.com     +----------+----------+   server.testbox.com   |
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Server - Os:  Oracle Linux Server 9  
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cat /etc/system-release ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y

192.168.1.40 ||server.second.com
dnf -y install nfs-utils
nano /etc/idmapd.conf
Domain = server.second.com
nano /etc/exports
/home/nfsshare 192.168.1.40/24(rw,no_root_squash)
mkdir /home/nfsshare
systemctl enable --now rpcbind nfs-server
firewall-cmd --add-service=nfs ; firewall-cmd --add-service={nfs3,mountd,rpc-bind} ; firewall-cmd --runtime-to-permanent

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Configure NFS Client -Oracle Linux Server 9||||  server.testbox.com|192.168.1.50|
dnf -y install nfs-utils
nano /etc/idmapd.conf
Domain = server.testbox.com
firewall-cmd --add-service=nfs ; firewall-cmd --add-service={nfs3,mountd,rpc-bind} ; firewall-cmd --runtime-to-permanent

mount -t nfs  192.168.1.40:/home/nfsshare /mnt
df -hT
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Configure NTP Server in Oracle Linux 9

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NTP stands for Network Time Protocol.
It is used to synchronize the time on your Linux system with a centralized NTP server.
A local NTP server on the network can be synchronized with an external timing source to keep all the servers in your organization in-sync with an accurate time.
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chronyc sources

dnf -y install chrony
nano  /etc/chrony.conf
change servers to synchronize (replace to your own timezone NTP server)
# need NTP server itself to sync time with other NTP server
#pool 2.centos.pool.ntp.org iburst
pool ntp.nict.jp iburst


# add network range to allow to receive time synchronization requests from NTP Clients
# specify your local network and so on
# if not specified, only localhost is allowed
allow 192.168.1.50/24

systemctl enable --now chronyd ; systemctl restart chronyd ; systemctl status chronyd
firewall-cmd --add-service=ntp ; firewall-cmd --runtime-to-permanent
chronyc sources

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How To Install Squid Proxy Server with Squid Basic Authentication On Rocky Linux 8.5

in This Tutorial you will Learn " How To Install Squid Proxy Server with Squid Basic Authentication On Rocky Linux 8.5"

Squid is a web proxy application with a variety of configurations and uses. Squid has a large number of access controls and supports different protocols, such as HTTP, HTTPS, FTP, and SSL.

Rocky Linux is an open-source enterprise operating system designed to be 100% bug-for-bug compatible with Red Hat Enterprise Linux®.
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Server - Os:  Rocky Linux 8.5  64Bit      |    IP -192.168.1.20        |     Hostname - www.primaryhost.com
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cat /etc/system-release ; sestatus ; hostname ; hostname -I ; dnf groupinstall "Development Tools" -y
dnf -y install squid httpd-tools
gedit  /etc/squid/squid.conf &>/dev/null
acl my_localnet src 192.168.1.20/24                                                                         -29
http_access deny to_localhost                                                                                - 46
#http_access allow localnet                                                                                      -55
http_access allow my_localnet   # line 57 : add                                                       -57

request_header_access Referer deny all
request_header_access X-Forwarded-For deny all
request_header_access Via deny all
request_header_access Cache-Control deny all
forwarded_for off

auth_param basic program /usr/lib64/squid/basic_ncsa_auth /etc/squid/.htpasswd
auth_param basic children 5
auth_param basic realm Squid Basic Authentication
auth_param basic credentialsttl 5 hours
acl password proxy_auth REQUIRED
http_access allow password

systemctl enable --now squid ; systemctl start squid
firewall-cmd --add-service=squid ; firewall-cmd --runtime-to-permanent

htpasswd -c /etc/squid/.htpasswd rocky
systemctl daemon-reload ; systemctl restart squid.service
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Proxy Client -
cat /etc/system-release ; hostname -I ; dnf groupinstall "Development Tools" -y
192.168.1.20 3128  

curl -x http://192.168.1.20:3128 -I http://google.com
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How To Install Node.js npm ( Creating Sample app ) on Oracle Linux 9

 Node.js is a JavaScript runtime for server-side programming. It allows developers to create scalable backend functionality using JavaScript, a language many are already familiar with from browser-based web development.
NPM is an acronym for Node Package Manager, which is the default package manager for Node.JS and the richest repository for Node.JS packages.
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Server - Os:  Oracle Linux Server 9   64Bit      | IP -192.168.1.50        |Hostname - server.testbox.com
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cat /etc/system-release ; dnf groupinstall "Development Tools" -y
curl -sL https://rpm.nodesource.com/setup_16.x | bash -
dnf install nodejs -y
node --version ; npm --version

Creating Sample app on Node.js
nano myapp.js
const http = require('http');

const hostname = '0.0.0.0';
const port = 3000;

const server = http.createServer((req, res) => {
  res.statusCode = 200;
  res.setHeader('Content-Type', 'text/plain');
  res.end('Hello World, running on NodeJS 1x');
});

server.listen(port, hostname, () => {
  console.log(`Server running at http://${hostname}:${port}/`);
});

node myapp.js
http://127.0.0.1:3000
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