Create Superuser in Mysql

Login MySQL using

mysql -u root -p

CREATE USER 'superuser'@'localhost' IDENTIFIED BY 'password';

GRANT ALL PRIVILEGES ON *.* TO 'superuser'@'localhost' WITH GRANT OPTION;

FLUSH PRIVILEGES;

exit;

How to improve ubuntu performamce

 Here I have involved some steps which may helpful to optimize your Ubuntu server speed.

 

1. Update Your System

Regularly update your system to ensure you have the latest performance improvements and security patches.

 sudo apt update

sudo apt upgrade

 2. Remove Unnecessary Start-up Applications

 Disable unnecessary startup applications to reduce boot time and free up system resources.

 sudo apt install gnome-tweak-tool

gnome-tweaks

 Navigate to the "Startup Applications" section and disable unnecessary programs.

 3. Use Lighter Desktop Environments

If you are using a resource-heavy desktop environment like GNOME or KDE, consider switching to a lighter one like XFCE or LXDE.

 sudo apt install xfce4

sudo apt install lxde

 4. Manage Swappiness

Adjust the swappiness value to reduce the use of the swap file and improve performance.

 sudo sysctl vm.swappiness=10

sudo nano /etc/sysctl.conf

Add or edit the line vm.swappiness=10 in /etc/sysctl.conf.

 5. Clean Up Your System

Remove unnecessary files and packages to free up space and reduce clutter.

 sudo apt autoremove

sudo apt clean

sudo apt autoclean

 Use a tool like BleachBit to clean up system files.

 sudo apt install bleachbit

sudo bleachbit

 6. Optimize Disk Usage

Use tools like fsck to check and repair file system errors.

 sudo fsck /dev/sdX

Use fstrim to trim SSDs.

sudo fstrim -v /

 7. Use a Faster DNS Server

Changing your DNS server can improve network performance. Consider using a faster DNS provider like Google DNS or OpenDNS.

 sudo nano /etc/resolv.conf

Add the following lines:

 nameserver 8.8.8.8

nameserver 8.8.4.4

8. Upgrade Hardware

Adding more RAM or upgrading to an SSD can significantly improve system performance.

9. Disable Animations

Disabling animations can make your desktop environment feel snappier.

gsettings set org.gnome.desktop.interface 

enable-animations false

10. Monitor System Resources

Use system monitoring tools to keep an eye on resource usage and identify bottlenecks.

 sudo apt install htop

htop

 11. Use Lightweight Applications

Use lightweight alternatives to resource-heavy applications (e.g., using Featherpad instead of Gedit).

 12. Kernel Optimization

 Use a low-latency kernel if you're doing audio production or other real-time tasks.

 sudo apt install linux-lowlatency

 

Courtesy: ChatGPT

How to migrate Linux Dspace to Window 10

Take a backup of Dspace database and folders

Assume the version is same with both OS [I have tested DSpace 6.3]

sudo su

mkdir dspace_backup

sudo chmod 777 dspace_backup

exit

dspace_backup/backup.sh

Copy below script to backup.sh file

nano /home/dspace/dspace_backup/backup.sh

#!/bin/bash

PGPASSWORD="dspace" pg_dump -U dspace -h localhost -Fc dspace | gzip > home/dspace/dspace_backup/dspace-$(date +%Y-%m-%d-%H.%M.%S).sql.gz

now=$(date +"%d_%m_%Y")

zip -r  /home/dspace/dspace_backup/$now-assetstore.zip /dspace/assetstore

zip -r  /home/dspace/dspace_backup/$now-log.zip /dspace/log

save the file &

Give a permission to file

sudo chmod +x dspace_backup/backup.sh

Go to directory

cd /home/dspace/dspace_backup

Issue the command

sh backup.sh

copy all files from the directory to Window10

(there will be three files sql.gz, assetstore.zip, and log.zip)

Locate all backup of Dspace database and folders anywhere you wish.

No go to Window Tomcat server and stop its service by

stop tomcat sever

Go to start-up button and open PGAdmin-III 

bellow box will appeared 

create new database [dspace] and also create [pgcrypto] Extension also

Now click on database tab and restore dspacesql (gz) file where you have located your .gz file

after restoring dspace db

delete [assetstore] directory from C:/dspace/

copy new assetstore directory to C:/dspace/

then issue the following command in Window machine

open cmd

Go to 

cd C:\dspace\bin\

dspace database info

dspace database migrate

dspace index-discovery -b

dspace filter-media

dspace index-discovery

dspace index-discovery -o

Then restart Tomcat in Window-10

Now check your backup is fully restored http://yourIP:8080/jspui

If you need any further help please book your slot: Here

or Call me 9428415401

Installing Koha 23.05 on ubuntu

apt update

sudo apt-get -y install sudo wget gnupg

wget -q -O- https://debian.koha-community.org/koha/gpg.asc | sudo apt-key add -
sudo apt-get update
echo 'deb http://debian.koha-community.org/koha stable main' | sudo tee /etc/apt/sources.list.d/koha.list    
sudo apt-get update
sudo apt-get install koha-common
sudo apt-get install mysql-server 
sudo nano /etc/apache2/ports.conf
change INTRAPORT to 8080
Listen 80
Listen <staff interface port number> i.e. 8080
sudo nano /etc/koha/koha-sites.conf
sudo a2enmod rewrite 
sudo a2enmod cgi 
sudo service apache2 restart
sudo service apache2 restart 
sudo koha-create --create-db library
sudo nano /etc/apache2/sites-enabled/000-default.conf
sudo service apache2 restart 
To Know the koha_library password
sudo koha-passwd library
http://IP-Domain name:8080 (staff)
http://IP-Domain (OPAC)

If Node Version Manager (nvm) does not install in Ubuntu

 Manual Install

export NVM_DIR="$HOME/.nvm" && (

  git clone https://github.com/nvm-sh/nvm.git "$NVM_DIR"

  cd "$NVM_DIR"

  git checkout `git describe --abbrev=0 --tags --match "v[0-9]*" $(git rev-list --tags --max-count=1)`

) && \. "$NVM_DIR/nvm.sh"

-------------------------------------

export NVM_DIR="$HOME/.nvm"

[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm

[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion

------------------------------------

(

  cd "$NVM_DIR"

  git fetch --tags origin

  git checkout `git describe --abbrev=0 --tags --match "v[0-9]*" $(git rev-list --tags --max-count=1)`

) && \. "$NVM_DIR/nvm.sh"

----------------

nvm install 16.18.1

Installing DSpace 6.x on Ubuntu/Debian

Software Requirements

Software needed to run DSpace.

• Java JDK 8
• Apache Maven
• Apache Ant
• PostgreSQL
• Apache Tomcat

Create User

Create a dspace user.

sudo useradd -m dspace

sudo passwd dspace

Install PostgreSQL

Install PostgreSQL database.

sudo apt install postgresql postgresql-client -y

Create a dspace user with a dspace password in PostgreSQL.

sudo su postgres

createuser -U postgres -d -A -P dspace

exit

Create a dspace database .

sudo -u dspace createdb -U dspace -E UNICODE dspace

Activate the pgcrypto extension.

sudo su postgres

psql --username=postgres dspace -c "CREATE EXTENSION pgcrypto;"

exit

Open the PostgreSQL configuration file.

sudo nano /etc/postgresql/12/main/pg_hba.conf

Add the following line at the bottom of the configuration.

local  all  dspace  md5

Restart PostgreSQL.

sudo systemctl restart postgresql

sudo systemctl status postgresql

Building DSpace

Install OpenJDK 8.

sudo apt install openjdk-8-jdk -y

If you have previously installed another version of OpenJDK, change the default java to OpenJDK 8.

sudo update-alternatives --config java

Install ant and maven.

sudo apt install ant maven -y

Create a dspace folder.

sudo mkdir /dspace

sudo chown dspace /dspace

Create a build folder for building DSpace.

sudo mkdir /build

sudo chmod -R 777 /build

cd /build

wget https://github.com/DSpace/DSpace/releases/download/dspace-6.3/dspace-6.3-src-release.tar.gz

Extract dspace*.tar.gz

sudo tar xzvf dspace*.tar.gz

Move to the dspace-6.3-src-release folder

cd dspace-6.3-src-release

Copy the local.cfg file.

sudo cp dspace/config/local.cfg.EXAMPLE dspace/config/local.cfg

Compile the DSpace package.

sudo mvn -U package

Install DSpace.

cd dspace/target/dspace-installer

sudo ant fresh_install

Install Apache Tomcat

Download and extract Apache Tomcat 9.

cd /opt

wget https://dlcdn.apache.org/tomcat/tomcat-9/v9.0.71/bin/apache-tomcat-9.0.71.tar.gz

sudo tar xzvf apache-tomcat-9.0.71.tar.gz

Change the apache-tomcat-9.0.41 folder to tomcat.

sudo mv apache-tomcat-9.0.71 tomcat

Open the file /etc/profile.

sudo nano /etc/profile

Add these lines at the bottom, configuration environment variables for Java.

export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

export CATALINA_HOME=/opt/tomcat

Copy dspace webapps to tomcat webapps.

sudo cp -r /dspace/webapps/* /opt/tomcat/webapps

Create a bash script so that Tomcat can run automatically.

sudo nano /etc/init.d/tomcat

Enter the following bash script.

#!/bin/bash

### BEGIN INIT INFO

# Provides:        tomcat9

# Required-Start:  $network

# Required-Stop:   $network

# Default-Start:   2 3 4 5

# Default-Stop:    0 1 6

# Short-Description: Start/Stop Tomcat server

### END INIT INFO

PATH=/sbin:/bin:/usr/sbin:/usr/bin

start() {

 sh /opt/tomcat/bin/startup.sh

}

stop() {

 sh /opt/tomcat/bin/shutdown.sh

}

case $1 in

  start|stop) $1;;

  restart) stop; start;;

  *) echo "Run as $0 <start|stop|restart>"; exit 1;;

esac

Give it executable permissions and set it as service.

sudo chmod +x /etc/init.d/tomcat

sudo update-rc.d tomcat defaults

Run Tomcat server and check its status.

sudo service tomcat start

sudo service tomcat status

DSpace Administrator

Create a DSpace administrator account.

sudo /dspace/bin/dspace create-administrator

Delete the builds folder.

sudo rm -rf /build

DSpace access test.

http://localhost:8080/xmlui or http://serverIP:8080/xmlui

http://localhost:8080/jspui or http://serverIP:8080/jspui

How to automatically reboot Ubuntu 22.04

 

Schedule reboots in the Ubuntu

launch a terminal

Type sudo su

sudo crontab -e and then press ENTER

Then 

Add the below line 

00 09   *   *   *    /sbin/shutdown -r +5

Press CTRL+X, then Y, then ENTER.

Your ubuntu server automatically restarts at 9:05am daily