Changing permision in opt folder

sudo chown -R $(whoami) /opt

snap install <app_name>
snap remove <app_name>
snap refresh
snap list

chsh -s /usr/bin/fish

sdk list [candidate]
ex: *sdk list java*

sdk install <candidate> <identifier>
ex : *sdk install java 21.0.7-oracle*

sdk default <candidate> <identifier>
ex : *sdk default java 21.0.7-oracle*

sdk uninstall <*candidate> <identifier>
ex : sdk uninstall java 21.0.7-oracle*

sdk home java current - can find the location of dir where installed java

This will compile the [file.java](<http://file.java>) with new feature of java 22 
(javac —enable-preview —release 22 [file.java](<http://file.java>))