Základní kurzy IT
Fakt základ, ukázky, nic pro profíky!
Keywords:
IT basic course
IT základní kurz
Content:
Odkazy, poznámky, příklady základních úvodů do IT, programování, správy systémů atd.
Občas se mě lidi ptají, jak se naučit něco z IT, tak shromažďuji pár základních poznámek, klíčových slov a odkazů.
Články:
Základy programování v JavaScriptu (můj příklad v JavaScriptu)
Úvody do SQL (česky a s příkladama)
Algoritmy:
Fibonacci heap - Fibonacci heap CZ
Spring Hibernate Microservices
Unsorted notes
Cheat sheet
REST:
- Spring HATEOAS - no links, no REST
Query Parameter vs URI Path - RequestParam vs PathVariable
- exception translation
DB:
mappedBy - reason, value
without mapped - it will use a relation table
EntityManager
MQ
amqp
Configuration
Etc
- ThreadPoolTaskExecutor = async exec
- paid - overview Getting Started With Spring 5
- testing - Mockito how to do in java - Mockito baeldung crossroads - Mockito baeldung
- Good guides - crossroads
Git unplugged notes
Rebase issue
# If someone rebases on public branch, after pull all others could see:
Your branch and 'origin/branch1' have diverged,
and have 2 and 3 different commits each, respectively.
Solution
git fetch origin
git reset --hard origin/main
src stackoverflow
Rebase issue
Your branch is ahead of 'origin/master' by 3 commits
Solution
git fetch -p # clean up local branches
git pull --rebase # pull and rebase my local commits on top of incoming
Better solution (unchecked)
Step 1 : git checkout branch1
Step 2 : git pull -s recursive -X theirs # merge strategies
Step 3 : git reset --hard origin/branch1
Rebase issue explained (long)
git rev-list --count --left-right branch1...upstream
git rev-list --count --left-right origin/master...HEAD
*
# to see if the local repository is ahead, push needed:
git rev-list origin..HEAD
# to see if the local repository is behind, pull needed:
git rev-list HEAD..origin
# if you have numbers for both, then the two repositories have diverged:
git rev-list --count --left-right origin/master...HEAD
src: stackoverflow
src: https://stackoverflow.com/a/40990959
src-long: https://stackoverflow.com/a/66981730
# squash - reset soft:
#git reset --soft master
git reset --soft origin/master
git add -A
git commit
git push --force
# squash - reset to merge-base:
git checkout branch1
git reset $(git merge-base master $(git branch --show-current))
git add -A
git commit
git push --force
# src: https://stackoverflow.com/questions/25356810/git-how-to-squash-all-commits-on-branch
# Note: git merge-base branch2 branch3
Squash
# squash - merge squash:
git checkout origin/master
git merge --squash origin/branch1
git commit
git push --force
Git branch_name vs refs
git show-ref origin/main
1. If $GIT_DIR/<refname> exists, that is what you mean (this is usually useful only for HEAD, FETCH_HEAD, ORIG_HEAD, MERGE_HEAD and CHERRY_PICK_HEAD);
2. refs/<refname> if it exists;
3. refs/tags/<refname> if it exists;
4. refs/heads/<refname> if it exists;
5. refs/remotes/<refname> if it exists;
6. refs/remotes/<refname>/HEAD if it exists.
src: stackoverflow.com
Long aside: how this all works (read only if sufficiently curious) :
src: stackoverflow.com
Git server repository (docker git repo)
RockStorm Git server on DockerHub - GitHub
Gogs by Pirates - GitHub like Git server
Gitea in Docker - demo - github
GitColony docker server - obsolete
Git server:
Google it:
https://www.google.com/search?q=gnu+gpl+git+server
Git server list - wiki:
https://en.wikipedia.org/wiki/Git#Git_server
Gerrit:
Home: https://www.gerritcodereview.com/
Wiki: https://en.wikipedia.org/wiki/Gerrit_(software)
GitOlite:
https://gitolite.com/gitolite/index.html
Wiki says: External projects like gitolite, which provide scripts on top of git software to provide fine-grained access control.
*
FLOSS:
Gogs
Gitea = fork of Gogs
Git Web interface self-hosted:
https://www.google.com/search?q=git+web+interface+self-hosted
Options – list – good overview:
https://www.cyberciti.biz/open-source/github-alternatives-open-source-seflt-hosted/
GitLab = web git, “Confluence” wiki, “Jira” tracker
https://gitlab.com/gitlab-org/gitlab-foss
Gitea – community fork of Gogs:
Savannah = GNU = free software foundation (FSF)
http://savannah.gnu.org/projects/administration
GitBucket – Open source
https://github.com/gitbucket/gitbucket
Gogs - self hosted Git:
*
Awesome Selfhosted:
https://github.com/awesome-selfhosted/awesome-selfhosted
GitWeb:
https://git-scm.com/book/en/v2/Git-on-the-Server-GitWeb
*
Git web UI – including proprietary and closed-source:
https://www.slant.co/topics/1440/~best-self-hosted-web-based-git-repository-managers
https://www.slant.co/topics/425/~best-git-web-interfaces
Static web hosting on GitHub using Jekyll
(other Jekyll hostings, free-included)
GitHub is ready to host your static web site using Jekyll
Read GitHub Pages intro.
Create public GitHub repo in format:
username.github.io
Exec:
git clone https://github.com/username/username.github.io
cd username.github.io
echo "Hello World" > index.html
git add --all
git commit -m "Initial commit"
git push -u origin main
Go to: https://username.github.io
*
Custom Domain and Domain Verification:
(sign in to your domain administration, i.e. ForPsi Domain Admin)
Verify ownership of example.com (on GitHub called apex domain):
Click your avatar on right-top corner
Settings
Pages
Verified domains
Click "Add a domain"
Then at GitHub pages level, following "domains" are yours:
www.example.com (custom sub domain)
blog.example.com
web.example.com
*.example.com
is only yours.
Warning: anything.web.example.com can be still used on GitHub Pages by any other user.
*
Steps:
Open GitHub
Go to your repo
Settings
Code and automation
Pages
Custom domain
type example.com (new CNAME file is created)
click Save (verification in progress)
-
Domain config:
Go to your domain administration, i.e. ForPsi Domain Admin
Create DNS records - either ALIAS, ANAME, or A (opt. AAAA for IPv6)
Test
dig example.com +noall +answer -t A
dig example.com +noall +answer -t AAAA
*
*
See also:
Google search for Jekyll Hyde Web
KDY / WHEN:
Neděle / Sunday
15. 8. 2021
9:00 – 18:00
TRASA / ROUTE:
Sázava
*
VLAK / TRAIN:
from destination to start for car drivers
Kácov (dest) - Zruč n. S (start)
Kácov (dest) - Zruč n. S (start) - Friday 22
TRAIN WALK:
Zruc NS from Train to start Camp Rakosi
*
START:
Výdej lodí / issuing canoes: 9.00–10.00
Zruč nad Sázavou
Kemp Rákosí
*
PŘESKOČIT / AVOID (pomalí / slow service):
Tůmův Chabeřický mlýn
*
ODBOČKA / FORK (suggested):
Želivka fork, short break, refreshment, crystal clear cold water
*
BREAK (doporučený / suggested):
nice weir
good kiosk - sausages, local beer, pancakes, coffee
it was perfect on last summer, I hope they keep the quality
*
CÍL / END:
Kácov
Kácov rental - Google maps point
Sběr lodí / return canoes: 15.00–19.00
KDO / WHO:
2 MarS single
2 MaD + Smita
3 Petr + Tamara + Ráša
2 Jiří + tatínek
PÚJČOVNA / RENTAL:
Bisport Kácov s.r.o., Kácov 158
https://www.bisport.cz/pujcovna-lodi
Mail: info@bisport.cz
Tel: + 420 777 335 618
PLATBA / PAYMENT:
Č.Ú. / Account: ***
Zpráva / Message: Your Name, Sazava 2021
*
ČÁSTKA / AMOUNT:
MarS: 399 CZK
MaD: 399 CZK
Jiri 2-seats: 399 CZK
Petr 3-seats: 555 CZK
*
PÚV CENA / ORIG PRICE:
Vydra 2 seats: 420 CZK / 1 canoe
Rivera 3 seats: 585 CZK / 1 canoe
sleva / discount: 5%
PÚJČOVNA / RENTAL – others:
Dronte (na Sázavě outsourcuje přes BiSport)
Samba (Ohře Ondra K a Anička letos, asi i loni a dříve)
Půjčovna Samba – stejná
KEYWORDS:
Canoe kanoe kánoe Sázava Sazava 2021 FAV
Create bridge
docker network create -d bridge mars_bridge
Run container inside specific network (i.e. Redis and Redis CLI)
docker run --name some-redis --network mars_bridge --rm -d redis
docker run -it --network mars_bridge --rm redis redis-cli -h some-redis
Connect container to network
docker network connect mars_bridge some-redis
Disconnect container from network
docker network disconnect mars_bridge some-redis
List Docker networks
docker network ls
Remove Docker network
docker network rm mars_bridge
Remove all unused networks
docker network prune
Inspect Docker network
docker network inspect mars_bridge
Inspect with formatted output
docker inspect --format='{{json .NetworkSettings.Networks}}' some-redis
docker inspect --format="{{json .NetworkSettings.Networks}}" some-redis
docker inspect --format="{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}" some-redis
Sources
Docker - networking containers
Docker Hub - Redis (as an example of Docker-networked container)
My Docker notes - crossroads
Docker orchestration with Kubernetes k8s
My Docker Kubernetes k8s notes
Docker memory CPU limits (Windows)
My Docker limits - cpu memory notes
Docker network configuration
My Docker networking notes
src: docs.docker.com
Docker Swarm stack deploy
My Docker Swarm stack deployment notes
src: docs.docker.com
See also
My AWS - Amazon Web Services - notes
DockerCon 2021 - conference
PlayWithDocker - play, 101tut, lab, get started, training
AWS - Amazon Web Services - notes
My unsorted notes about AWS
AWS general xroad
Trainings all
Trainings and Certifications blog post
aws.training site
10 miutes tutorials crossroad
WordPress, ServerLess, React, Linux VM, MySQL, Static S3, PostgreSQL
Popular AWS - services crossroads
Free Tier, Elastic Beanstalk, DynamoDB, RDS (Relational Database Service), CloudFront, Glacier
LightSail
- servers and services management console
- easily setup your service
EC2
- Elastic Compute Cloud
EC2 get started - LAMP, Elastic, WordPress, etc
S3
- Simple Storage Service
Lambda
- serverless computing
Lambda - get started - crossroad
* Lambda - ServerLess web app tutorial
* ServerLess with Lambda, API GateWay, Amplify, DynamoDB, Cognito