Update README.md

Computer Networking/Conection-modify.md

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+Supose you want to make some changens in available network profile with the following parameter:
+Configure your Host Name, IP Address, Gateway and DNS.
+
+Host name : linux.local.server
+hostname : abc.com
+IP Address : 172.168.130.38
+Subnet : 255.255.255.0
+Gateway : 172.168.130.1
+DNS : 172.168.130.1
+
+## Follow this steps
+##### Step 1: check all devices status first.
+  `# nmcli dev status`
+##### Step 2: select any connection profile that you want to modify. and make changes for IP addresses and Gateway(e.g "static" as a profile name for this practical)
+  `# nmcli con mod static ipv4.addresses 172.168.130.38/24 ipv4.gateway 172.168.130.1 ipvr.method manual `
+##### Step 3: Add DNS Configuration
+  `# nmcli con mod static ipv4.dns 172.168.130.1`
+##### Step 4: replicate all changes on the network.
+  `# nmcli con up static`
+##### Step 5: check the current hostname.
+  `# hostnamectl`
+##### Step 6: set hostname to linux.local.server .
+  `# hostnamectl set-hostname linux.local.server`
+##### Step 7: verify that the hostname has been set.
+  `# hostname`
+
+
+##Done 
+

README.md

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-# Devops-simplified
+### Hi there, 👋 
+# Welcome........!
+###     to the world of DevOps
+there will be some notes about networking basics as well as linux basic commands.
+And Some awesome files
+
+## Steps to get All Notes.
+##### Step 1: Clone Project to your PC
+  `$ git clone https://github.com/fykaa/Devops-simplified.git`