How to inatall docker on Ubuntu using apt repository

 # Add Docker's official GPG key:

sudo apt-get update

sudo apt-get install ca-certificates curl

sudo install -m 0755 -d /etc/apt/keyrings

sudo curl -fsSL https://download.docker.com/linux/ubuntu/gpg -o /etc/apt/keyrings/docker.asc

sudo chmod a+r /etc/apt/keyrings/docker.asc

# Add the repository to Apt sources:

echo \

  "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/ubuntu \

  $(. /etc/os-release && echo "${UBUNTU_CODENAME:-$VERSION_CODENAME}") stable" | \

  sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

sudo apt-get update

Install Latest version:

sudo apt-get install docker-ce docker-ce-cli containerd.io docker-buildx-plugin docker-compose-plugin

sudo docker run hello-world

Reset Ubuntu with factory reset & and reinstall

Try configuring unconfigured packages:

sudo dpkg --configure -a

Update the contents of the repositories

sudo apt-get update

Try to fix missing dependencies:

sudo apt-get -f install

Update all packages with new versions available:

sudo apt-get full-upgrade

Reinstall Ubuntu desktop:

sudo apt-get install --reinstall ubuntu-desktop

Remove unnecessary packages:

sudo apt-get autoremove

Delete downloaded packages already installed:

sudo apt-get clean

Reboot the system to see if the issue was resolved:

sudo reboot

 

How to create a user in ubuntu with password giving all permissions ?

 o create a new user in Ubuntu with a password and grant them all permissions (including administrative privileges), follow these steps:

1. Create a New User

Run the following command, replacing username with your desired username:

sudo adduser username

• You will be prompted to enter a password and some optional details.

2. Add User to the Sudo Group

To grant full administrative permissions, add the user to the sudo group:

sudo usermod -aG sudo username

• This allows the user to execute commands as root using sudo.

3. Verify the User’s Permissions

Switch to the new user:

su - username

Then check if the user can run sudo commands:

sudo whoami

If it returns root, the user has full administrative access.

4. (Optional) Grant Passwordless Sudo Access

If you want the user to execute sudo commands without entering a password:

echo "username ALL=(ALL) NOPASSWD:ALL" | sudo tee /etc/sudoers.d/username

Now the user has full administrative privileges. 

How to install Install and Configure Alfresco Community Edition

System requirements:

Based on these assumptions, the following options are recommended:

1. 2 servers with the following specifications:
• 4 CPUs
• 32 GB RAM per server
• Tomcat Java options:
• Xms512M
• Xmx 20 G
• XX:MaxPermSize=256m
• XX:-DisableExplicitGC
• web.xml
• maxThreads=2 50
• 30 GB HDD space
• Servers must be load-balanced the load-balancer must have:
• Session affinity: enabled
• Web server probe: recommended
2. 4 servers with the following specifications
• 4 CPUs
• 16 GB RAM per server
• Tomcat Java Options:
• Xms512M
• Xmx1 0 G
• XX:MaxPermSize=256m
• XX:-DisableExplicitGC
• web.xml
• maxThreads= 125
• 30 GB HDD space
• Servers must be load-balanced the load-balancer must have:
• Session affinity: enabled
• Web server probe : recommended

We can follow the following instructions:

Part 01 : https://medium.com/p/6ddd06416711

Part 03 : https://medium.com/p/bcde44232f59

Command to install direct admin on ubuntu 22.04

 sudo apt update

sudo apt upgrade

sudo apt install wget gcc g++ make flex bison openssl libssl-dev

cd /usr/local/src

wget https://www.directadmin.com/setup.sh

chmod +x setup.sh

sudo ./setup.sh

sudo ufw enable

sudo ufw allow 2222

sudo ufw allow 80

https://YOUR_SERVER_IP:2222

How to get Ranking of the Students in Excel using RANK Function

=RANK(number,ref,[order])

To rank in descending order, we will use the formula =RANK(B2,($C$5:$C$10),0)

If we want unique ranks, we can use the formula:

=RANK(C5,$C$5:C$10,0)+COUNTIF($C$5:C5,C5)-1

For ascending order, the formula would be:

=RANK.EQ(C5,$C$5:C$10,1)+COUNTIF($C$5:C5,C5)-1

Prevent duplicate entry in excel.

On the Settings tab, choose "Custom" from the Allow drop down list and enter =COUNTIF($D:$D,D2)=1 into the Formula box