Academia JavaEE Workspace in Raspbian

Java

apt install openjdk-8-jdk-headless
apt install nodejs
apt install maven
apt install npm
apt install ant

PostgreSQL

Install

apt install postgresql postgresql-contrib
sudo su; su - postgres

createuser postgres; createdb postgres
createuser root; createdb root
createuser pi; createdb pi
exit; exit

Schema

-- sudo su; su - postgres; psql
CREATE DATABASE academia;
CREATE USER academia WITH ENCRYPTED PASSWORD 'academia';
GRANT ALL PRIVILEGES ON DATABASE academia TO academia;

sudo su; su - postgres
psql academia < academia.sql
psql -h db00.chorke.org -p 5432 -d academia -U academia
psql -h db00.chorke.org -p 5432 -d academia -U academia -W -f academia.sql
pg_restore -h db00.chorke.org -p 5432 -d academia -U academia academia.dump

Delete

-- sudo su; su - postgres; psql
REVOKE CONNECT ON DATABASE academia FROM public;
SELECT pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
WHERE pg_stat_activity.datname in ('academia');

sudo su; su - postgres
ps -ef | grep postgres
kill -9 PID

-- sudo su; su - postgres; psql
DROP DATABASE IF EXISTS academia;

PgAdmin4

 apt install curl
 curl https://www.pgadmin.org/static/packages_pgadmin_org.pub | sudo apt-key add
 sudo sh -c 'echo "deb https://ftp.postgresql.org/pub/pgadmin/pgadmin4/apt/$(lsb_release -cs) pgadmin4 main" > \
/etc/apt/sources.list.d/pgadmin4.list && apt update'
 apt install pgadmin4-desktop

Redis

apt install redis-server
nano /etc/redis/redis.conf
: <<'END_COMMENT'
# If you run Redis from upstart or systemd, Redis can interact with your
# supervision tree. Options:
#   supervised no      - no supervision interaction
#   supervised upstart - signal upstart by putting Redis into SIGSTOP mode
#   supervised systemd - signal systemd by writing READY=1 to $NOTIFY_SOCKET
#   supervised auto    - detect upstart or systemd method based on
#                        UPSTART_JOB or NOTIFY_SOCKET environment variables
# Note: these supervision methods only signal "process is ready."
#       They do not enable continuous liveness pings back to your supervisor.
supervised systemd
END_COMMENT
systemctl status redis-server

Workspace

mkdir -p $HOME/chorke
mkdir -p /opt/dev/$USER/chorke/academia
chown $USER:$USER -R /opt/dev/$USER

export ACADEMIA_WSS="$HOME/chorke/academia"
ln -s /opt/dev/$USER/chorke/academia $ACADEMIA_WSS
ls -lah $HOME/chorke
nano ~/.bashrc

Editor

sudo apt install apt-transport-https
wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg | sudo apt-key add -
echo "deb https://download.sublimetext.com/ apt/stable/" | sudo tee /etc/apt/sources.list.d/sublime-text.list
sudo apt update;sudo apt install sublime-text
sudo snap install notepad-plus-plus

Git SCM

ssh-keygen -t rsa -b 4096 -C "[email protected]"
: <<'END_COMMENT'
Generating public/private rsa key pair.
Enter file in which to save the key (/home/user/.ssh/id_rsa): /home/user/.ssh/git_academia_chorke_org_rsa
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/user/.ssh/git_academia_chorke_org_rsa
Your public key has been saved in /home/user/.ssh/git_academia_chorke_org_rsa.pub
The key fingerprint is:
SHA256:TXBbBINcPcVtdVFRjs/P+jaxMFAIwr3uqdlt8tmrLVQ [email protected]
The key's randomart image is:
+---[RSA 4096]----+
|      .oo+*++o.+@|
|       .++ =o..o+|
|          + .....|
|         + . E o |
|        S . o   o|
|         . . o o.|
|        . o   o =|
|        o+.o+  +.|
|       o..+=o+ooo|
+----[SHA256]-----+
END_COMMENT
ls -lah ~/.ssh/
cat < ~/.ssh/git_academia_chorke_org_rsa.pub

nano ~/.ssh/config
: <<'END_COMMENT'
Host git.academia.chorke.org
     HostName git.academia.chorke.org
     PreferredAuthentications publickey
     IdentityFile ~/.ssh/git_academia_chorke_org_rsa
     User git
END_COMMENT

git config --global user.email "[email protected]"
git config --global user.name "FULL NAME"
ssh -vT git.academia.chorke.org

Knowledge

disk usage
du -h /var
du -sh /var
du -csh ~/Do*
du -csh /var/log /var/lib
du -sh --apparent-size /var/lib
du -h /var/ | sort -rh | head -5

snap install telegram-sergiusens
snap install notepad-plus-plus
snap install skype --classic
sudo apt install gtkhash
apt  install net-tools
snap install postman

ls -lah ~/.local/share/applications/
ls -lah ~/.config/autostart/
ls -lah ~/.local/share/

rm -rf ~/.local/share/applications/jetbrains-toolbox.desktop
rm -rf ~/.config/autostart/jetbrains-toolbox.desktop
rm -rf ~/.local/share/JetBrains/Toolbox

reset time zone
timedatectl set-ntp true
timedatectl set-ntp false
timedatectl set-time '2021-12-31 23:58:00'
timedatectl set-timezone 'Asia/Kuala_Lumpur'

#nano ~/.bashrc
#nano ~/.zshenv
#nano ~/.profile
#nano ~/.bash_profile
export ACADEMIA_WSS="$HOME/chorke/academia"
export ACADEMIA_LOG_PATH="$HOME/.chorke/academia/var/http/logs"

source ~/.bashrc
source ~/.profile
source ~/.bash_profile

source ~/.zshenv
source ~/.zprofile/.zlogin

git stashing
git stash; git checkout -b new_branch; git stash pop
git add .; git commit -m "new feature added"; git push 

ssh-keygen -p -f ~/.ssh/git_academia_chorke_org_rsa
: <<'END_COMMENT'
Enter old passphrase: 
Key has comment '[email protected]'
Enter new passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved with the new passphrase.
END_COMMENT

Postgres SSH Dump

sudo su
mkdir /var/lib/postgresql/.ssh

cp /home/pi/.ssh/cid_academia_rsa* /var/lib/postgresql/.ssh/
cp /home/pi/.ssh/config /var/lib/postgresql/.ssh/
cp -r /home/pi/chorke /var/lib/postgresql/

chown postgres:postgres -R /var/lib/postgresql/.ssh
chown postgres:postgres -R /var/lib/postgresql/chorke

su - postgres
cd ~/chorke/academia/assets
sh copy_dbs_staging2staging_ebis.sh

comment and uncomment sql
sed -i -e 's|^|-- |g' src/main/resources/db/migration/*.sql
sed -i -e 's|^-- ||g' src/main/resources/db/migration/*.sql

References

Install and Use PostgreSQL on Ubuntu 18.04 Install and Secure Redis on Ubuntu 18.04 Install Telegram Messenger on Ubuntu Sublime Text Linux Package Manager Install Java with Apt on Ubuntu 18.04 Install pgAdmin 4 in Server Mode Install PostgreSQL 13 in Ubuntu Installing Postman on Ubuntu Install PgAdmin4 desktop PostgreSQL

Add a prefix beginning of each line PostgreSQL Apt Repository Install Balena Etcher LAMP Stack for PI LAPP Stack for PI