Soluții pentru problemele tale IT
Computer batteries have a limited lifespan and degrade over time, so they’re often the first thing to go on a MacBook. You can replace a MacBook’s battery yourself or pay Apple to do it, but you’d want to check its health first to know whether it’s the right time to do so.
[mai mult...]UFW (Uncomplicated Firewall) is a straightforward tool for managing firewall rules on Linux systems. If you want to allow DNS access only from a specific IP, you can do so by configuring a specific rule in UFW. Here’s how:
Step 1: Install UFW (if not already installed)
If you don’t already have UFW installed, you can do so using the following command in the terminal:
sudo apt install ufw
Step 2: Enable UFW
If UFW is not already enabled, you can do so using the command:
sudo ufw enable
Step 3: Adding a Rule for DNS Access
To allow DNS access only from a specific IP (let’s assume the IP address is 192.168.1.100), use the command:
sudo ufw allow from 192.168.1.100 to any port 53
This command allows traffic from the specified IP address to any destination on port 53, which is the standard port used for the DNS service.
Step 4: Checking the Added Rule
You can check the added rule using the command:
sudo ufw status
This will show you a list of all active UFW rules.
Step 5: Testing DNS Access
Finally, you can test whether the rule is working as intended. You can use a command such as nslookup or dig to test DNS access to an external DNS server from the specified IP address.
Make sure to replace the IP address specified in the command sudo ufw allow from 192.168.1.100 to any port 53 with the IP address you want to allow DNS access from. Also, verify and adjust any other settings or ports as per your specific needs.
Step 1: Start with the Terminal
Open up the terminal – that little space where you can do big things! It’s like having your personal magician who can work wonders with just a few simple commands. Find it in your menu or hit Ctrl + Alt + T to bring it up.
Step 2: Check for Updates
It’s time to see what surprises today has in store! Type with confidence:
sudo yum check-update
This command will look for the latest updates available for your system and bring you all the news.
Step 3: See What’s New
Let’s see what’s on the list! Run the command:
sudo yum list updates
Here you’ll see a list of all the packages that are ready to have a little update party on your system. Give them a little wave!
Step 4: Update Everything
It’s time to get the party started! Type:
sudo yum update
This will take all the updates you’ve selected and install them for you. It’s like giving your system a new lease on life!
[mai mult...]Step 1: Start with the Terminal
Open up the terminal – that little space where you can do big things! It’s like having your personal magician who can work wonders with just a few simple commands. Find it in your menu or hit Ctrl + Alt + T to bring it up.
Step 2: Check for Updates
It’s time to see what surprises today has in store! Type with confidence:
sudo apt update
This command will look for the latest updates available for your system and bring you all the news.
Step 3: See What’s New
Let’s see what’s on the list! Run the command:
sudo apt list --upgradable