diff options
Diffstat (limited to 'doc')
| -rw-r--r-- | doc/note/binutils/dumpbin.txt | 16 | ||||
| -rw-r--r-- | doc/note/bitbucket/Bitbucket.txt | 28 | ||||
| -rw-r--r-- | doc/note/docker/Docker-Daemon-Install.txt | 53 | ||||
| -rw-r--r-- | doc/note/docker/Docker.txt | 45 | ||||
| -rw-r--r-- | doc/note/ffmpeg/ffmpeg.txt | 50 | ||||
| -rw-r--r-- | doc/note/links/links.txt | 391 | ||||
| -rw-r--r-- | doc/note/ssh/ssh-setup.txt | 49 | ||||
| -rw-r--r-- | doc/note/ssh/ssh-usage.txt | 40 | ||||
| -rw-r--r-- | doc/note/systemd/systemd.txt | 33 | ||||
| -rw-r--r-- | doc/note/tar/tar.txt | 33 | ||||
| -rw-r--r-- | doc/note/tcpdump/tcpdump.txt | 60 | ||||
| -rw-r--r-- | doc/note/tcpdump/wireshark.txt | 13 |
12 files changed, 811 insertions, 0 deletions
diff --git a/doc/note/binutils/dumpbin.txt b/doc/note/binutils/dumpbin.txt new file mode 100644 index 0000000..e71be0e --- /dev/null +++ b/doc/note/binutils/dumpbin.txt @@ -0,0 +1,16 @@ + +DumpBin For Windoof +=================== + +Analyze PE32 / PE32+ files. + +Location: "C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\bin\dumpbin.exe" + +Help + + dumpbin /? + +List needed DLLs. + + dumpbin /DEPENDENTS foo.exe + diff --git a/doc/note/bitbucket/Bitbucket.txt b/doc/note/bitbucket/Bitbucket.txt new file mode 100644 index 0000000..9083aca --- /dev/null +++ b/doc/note/bitbucket/Bitbucket.txt @@ -0,0 +1,28 @@ + +Bitbucket CheatSheet +==================== + + +## Download ZIP / TAR + + https://${USER}:{pass}@gitit.post.ch/rest/api/latest/projects/~FANKHAUSEAND/repos/FOO/archive?format=tgz + + https://${USER}:{PASS}@gitit.post.ch/rest/api/latest/projects/~FANKHAUSEAND/repos/FOO/archive?at=refs%2Fheads%2F{BRANCH}&format=tgz + + +TODO test: +curl -u USER:PASS https://gitit.post.ch/rest/api/1.0/projects/WORK/repos/my-repo/commits/?until=master + +curl -sSD- https://gitit.post.ch/2.0/repositories/ISA?fields=values.links + + +## Image size in comment + +Source: "https://stackoverflow.com/a/67069086/4415884" + +{width=50%} +{height=50 width=60} +{height=100} +{width=200px} + + diff --git a/doc/note/docker/Docker-Daemon-Install.txt b/doc/note/docker/Docker-Daemon-Install.txt new file mode 100644 index 0000000..c6a120a --- /dev/null +++ b/doc/note/docker/Docker-Daemon-Install.txt @@ -0,0 +1,53 @@ + +How to install a docker daemon eg in a VM or so +=============================================== + +Setup a VM (eg debian bullseye) + +Add auth proxy in "/etc/environment" + +Make sure "apt update" works. + +Install docker as described on "https://docs.docker.com/engine/install/debian/" + + sudo apt update + sudo apt-get install -y --no-install-recommends ca-certificates curl gnupg lsb-release + + # I had to download that gpg on my host and then pasting it into the vm + # to use it there + curl -sSL https://download.docker.com/linux/debian/gpg | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg + + echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] https://download.docker.com/linux/debian $(lsb_release -cs) stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null + + sudo apt update + sudo apt install -y --no-install-recommends docker-ce docker-ce-cli containerd.io + +Edit "/lib/systemd/system/docker.service" and add environ config in "service" +section (HINT: "/etc/environment" does not work) + + [service] + ... + Environment="HTTP_PROXY=http://10.0.2.2:31280" + Environment="http_proxy=http://10.0.2.2:31280" + Environment="HTTPS_PROXY=http://10.0.2.2:31280" + Environment="https_proxy=http://10.0.2.2:31280" + Environment="NO_PROXY=127.0.0.1,10.0.2.2,*.post.ch" + Environment="no_proxy=127.0.0.1,10.0.2.2,*.post.ch" + + +Edit (or create) "/etc/docker/daemon.json" with contents as below. +HINT: Maybe 'insecure' not needed, ToBeTested. + + { + "registry-mirrors": [ + "https://docker.tools.post.ch" + ], + "insecure-registries" : [ + "index.docker.io", + "docker.tools.post.ch" + ] + } + + + + diff --git a/doc/note/docker/Docker.txt b/doc/note/docker/Docker.txt new file mode 100644 index 0000000..ebc0193 --- /dev/null +++ b/doc/note/docker/Docker.txt @@ -0,0 +1,45 @@ + +# Docker +================ + + +## Manage Volumes + +List: + docker volume ls + +List LARGE volumes: + sudo sh -c 'cd /var/lib/docker/volumes && du -hs *' | sort -hrk1 | head + +Show owner: + docker ps -a --filter volume=VOLUME + +Browse image: + docker image ls | grep base + docker run --rm -ti --entrypoint /bin/bash IMAGE -s + +Browse volume: + docker run --rm -ti -v=VOLUME:/mnt/myvolume IMAGE bash + +Browse dead container: + //TODO: docker exec --entrypoint /bin/bash CONTAINER args for bash + //WRONG: docker run --entrypoint /bin/bash CONTAINER args for bash + +Export image: + docker save PATH/NAME:VERSION > IMAGE.tar + +Side-Mount tcpdump into container where it does not exist + docker run --rm -ti --network container:"${CNTNR_TO_DUMP:?}" -v "/tmp/foo:/work" "${IMG_WITH_TCPDUMP_EG_BASEIMG:?}" bash + + + +## Publish custom images to artifactory + +To allow deletion: Tag MUST contain "latest" or "SNAPSHOT". Eg: +- "docker.tools.post.ch/USERNAME/<imagename>:latest" + +docker build -t my_image:0.0.0-SNAPSHOT . + + + + diff --git a/doc/note/ffmpeg/ffmpeg.txt b/doc/note/ffmpeg/ffmpeg.txt new file mode 100644 index 0000000..9d95bfd --- /dev/null +++ b/doc/note/ffmpeg/ffmpeg.txt @@ -0,0 +1,50 @@ + +ffmpeg +================ + +j +## Extract Audio From webm + +Lookup format of audio stream with: + + ffmpeg -i in.webm + +Then use that knowlege to extract that (audio) stream: + + ffmpeg -i in.webm -vn -acodec copy out.FORMAT_FROM_BEFORE + + + +## Convert Formats + +ffmpeg -i in.opus out.wav + + + +## Record Desktop + + ffmpeg -f gdigrab -framerate 6 -probesize 10M -offset_x 0 -offset_y 0 \ + -video_size 1920x1200 -show_region 1 -i desktop -c:v h264_qsv \ + -pix_fmt yuv420p "output-$(date +%Y%m%d-%H%M%S).mp4" + + + +## Video to Gif + +HINT: Use same filter for palette as for conversion. + + FILTERV=fps=6,scale=-1:600 + FILTERV=fps=6,scale=-1:480 + INPUTV=input.mp4 + +Create custom palette: + ffmpeg -ss 4 -t 33 -i "$INPUTV" -vf "$FILTERV,palettegen=stats_mode=diff" palette.png + +Use this palette: + ffmpeg -ss 4 -t 33 -i "$INPUTV" -i palette.png -filter_complex "[0:v]$FILTERV[vid];[vid][1:v]paletteuse=dither=bayer:bayer_scale=5:diff_mode=rectangle" output.gif + +Working example from web (but not optimized): + ffmpeg -ss 0 -t 2.5 -i INPUT.mp4 -filter_complex "[0:v] fps=12,scale=-1:600,split [a][b];[a] palettegen=stats_mode=diff [p];[b][p] paletteuse=new=1" OUTPUT.gif + + + diff --git a/doc/note/links/links.txt b/doc/note/links/links.txt new file mode 100644 index 0000000..1519b81 --- /dev/null +++ b/doc/note/links/links.txt @@ -0,0 +1,391 @@ + +Links (Aka arguments) +===================== + +## Pro DI over serviceLocator +- "http://blog.ploeh.dk/2010/02/03/ServiceLocatorisanAnti-Pattern/" +- "https://adamcod.es/2013/11/25/service-locator-vs-dependency-injection-container.html" +- "https://stackoverflow.com/questions/10356497/is-is-an-anti-pattern-to-inject-di-container-to-almost-each-class" +- "https://www.devtrends.co.uk/blog/how-not-to-do-dependency-injection-the-static-or-singleton-container" + +## Pro constructor injection: +- "http://olivergierke.de/2013/11/why-field-injection-is-evil/" +- "https://www.petrikainulainen.net/software-development/design/why-i-changed-my-mind-about-field-injection/" +- "http://blog.schauderhaft.de/2012/06/05/repeat-after-me-setter-injection-is-a-symptom-of-design-problems/" +- "http://blog.schauderhaft.de/2012/01/01/the-one-correct-way-to-do-dependency-injection/" +- "https://spring.io/blog/2007/07/11/setter-injection-versus-constructor-injection-and-the-use-of-required/" +- "http://evan.bottch.com/2009/02/03/setter-injection-sucks/" + +## Pro DI over inheritance: +- "https://stackoverflow.com/questions/30767395/when-to-use-di-over-abstract-inheritance" + +## Contra global state: +- "https://softwareengineering.stackexchange.com/questions/148108/why-is-global-state-so-evil" +- "https://dzone.com/articles/why-static-bad-and-how-avoid" +- "https://en.wikipedia.org/wiki/Global_variable" + +## Contra property injection: +- "https://gitit.post.ch/projects/ISA/repos/platform/pull-requests/132/overview" +- "https://stackoverflow.com/a/12476575/4415884" + +## Dependency inversion example: +- "https://softwareengineering.stackexchange.com/a/191725" +- "https://lostechies.com/derickbailey/2011/09/22/dependency-injection-is-not-the-same-as-the-dependency-inversion-principle/" +- "http://www.oodesign.com/dependency-inversion-principle.html" (Says do not always) + +## Strategy Pattern (Class with only one method is OK) +- "https://softwareengineering.stackexchange.com/questions/225893/are-classes-with-only-a-single-public-method-a-problem" + +## contra static method (aka utility classes): +- "https://simpleprogrammer.com/static-methods-will-shock-you/" +- "http://vojtechruzicka.com/avoid-utility-classes/" + +## static method wrapping: +- "https://stackoverflow.com/questions/6523463/how-to-use-dependency-injection-with-static-methods" +- "https://medium.com/@slavik57/static-methods-to-dependency-injection-in-3-simple-steps-c3f50bf3f115" + +## Contra mocking framework: +- "http://www.disgruntledrats.com/?p=620" + +## Contra oneliners: +- "http://wiki.c2.com/?IntroduceExplainingVariable" +- "https://refactoring.com/catalog/extractVariable.html" +- "https://github.com/swisspush/apikana/blob/v0.9.19/src/deps/helper.js#L207-L211" + +## Git: pro merge, contra rebase: +- "https://medium.com/@fredrikmorken/why-you-should-stop-using-git-rebase-5552bee4fed1" + +## Git: contra rebase shared/remote: Do NEVER rebase shared branches: +- "https://medium.freecodecamp.org/git-rebase-and-the-golden-rule-explained-70715eccc372" + +## Git: pro squash: +- "https://blog.carbonfive.com/2017/08/28/always-squash-and-rebase-your-git-commits/" + +## Git: merge VS rebase: Choose right strategy for right task: +- "https://delicious-insights.com/en/posts/getting-solid-at-git-rebase-vs-merge/" + +## Git is NOT an artifact storage +- "https://devops.stackexchange.com/q/452" + +## Pro FailFast, dont ignore errors: +- "https://softwareengineering.stackexchange.com/a/190535" +- [Ignore Return IllegalThreadStateException](https://gitit.post.ch/projects/ISA/repos/zarquon/pull-requests/2/overview?commentId=61293) + +## Contra Java Optional: +- "https://homes.cs.washington.edu/~mernst/advice/nothing-is-better-than-optional.html" + +## SOLID: +- "https://www.youtube.com/watch?v=TMuno5RZNeE" +- SRP "https://blog.ndepend.com/solid-design-the-single-responsibility-principle-srp/" +- OCP "https://blog.ndepend.com/solid-design-the-open-close-principle-ocp/" +- LSP "https://blog.ndepend.com/solid-design-the-liskov-substitution-principle/" +- DIP "https://stackify.com/dependency-inversion-principle/" + +## Java how to handle InterruptedException: +- "https://www.yegor256.com/2015/10/20/interrupted-exception.html" +- "https://stackoverflow.com/questions/3976344/handling-interruptedexception-in-java" +- "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/39/overview?commentId=33603" +- "https://gitit.post.ch/projects/ISA/repos/zarquon/pull-requests/3/overview?commentId=62065" +- "https://jira.post.ch/browse/SDCISA-5624" +- "https://gitit.post.ch/projects/ISA/repos/halfrunt/pull-requests/27/overview?commentId=105541" + +## Please don't never not avoid nevative (un)logic +- "https://schneide.blog/tag/boolean-statements/" + +## maximum line length: +- "https://www.codereadability.com/maximum-line-length/" + +## composition over inheritance: +- "https://medium.com/humans-create-software/composition-over-inheritance-cb6f88070205" +- "https://softwareengineering.stackexchange.com/a/371715/306800" +- "https://youtu.be/wfMtDGfHWpA" + +## requirements, experts, business: +- "https://www.youtube.com/watch?v=BKorP55Aqvg" + +## technical dept (technische schulden) +- "https://www.youtube.com/watch?v=mSuUPsbqmQ8" + +## Why Cant Programmers Program? +- "https://blog.codinghorror.com/why-cant-programmers-program/" + +## Do Certifications Matter? +- "https://blog.codinghorror.com/do-certifications-matter/" + +## Single Line If Statements +- "https://medium.com/@jonathanabrams/single-line-if-statements-2565c62ff492" + +## Why I Have Given Up On Coding Standards +- "http://www.richardrodger.com/2012/11/03/why-i-have-given-up-on-coding-standards/" + +## slf4j logger dos and donts0 +- [case SO](https://stackoverflow.com/questions/1417190/should-a-static-final-logger-be-declared-in-upper-case) +- [case java-styleguide](https://web.archive.org/web/20120911192801if_/http://developers.sun.com/sunstudio/products/archive/whitepapers/java-style.pdf#G3.5426) +- [case slf4j](http://www.slf4j.org/api/org/slf4j/Logger.html) +- [General rules](https://gualtierotesta.github.io/java/tutorial-correct-slf4j-logging-usage-and-how-to-check-it/) +- [logging guards](https://stackoverflow.com/a/12953090/4415884) + +## Misleading log msg messages +- "https://gitit.post.ch/projects/ISA/repos/zarquon/pull-requests/2/overview?commentId=61283" + +## Test Coverage Is Stupid +- "https://gitit.post.ch/projects/ISA/repos/vannharl/pull-requests/2/overview?commentId=51611" + +## don't never not avoid nevative (un)logic +- "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/226/overview?commentId=73901" +- "https://gitit.post.ch/projects/ISA/repos/zarquon/pull-requests/2/overview?commentId=61255" + +## CodeLeichen +- [no think no brain stupid adopt](https://gitit.post.ch/projects/ISA/repos/zarquon/pull-requests/2/overview?commentId=61313 + +## Java Instance initializer (Constructor Alternative) +- "https://gitit.post.ch/projects/ISA/repos/zarquon/pull-requests/2/overview?commentId=61316" + +## Rest API Change Json Unknown/additional Properties +- "https://gitit.post.ch/projects/ISA/repos/zarquon/pull-requests/2/overview?commentId=61312" + +## Code Style format auto-formatters +- [static final java uppercase](https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/82/overview?commentId=39126) +- [invalid java class name](https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/82/overview?commentId=39125) +- "https://gitit.post.ch/projects/ISA/repos/zarniwoop/pull-requests/20/overview?commentId=85912" +- "https://gitit.post.ch/projects/ISA/repos/zarniwoop/pull-requests/21/overview?commentId=87250" +- "https://gitit.post.ch/projects/ISA/repos/beeble/pull-requests/126/overview?commentId=70762" +- "https://gitit.post.ch/projects/ISA/repos/common-metric-api/pull-requests/4/overview?commentId=71386" +- "https://gitit.post.ch/projects/ISA/repos/eagle/pull-requests/257/overview?commentId=72952" +- "https://gitit.post.ch/projects/ISA/repos/customer-api/pull-requests/10/overview?commentId=89900" + +## Abstractions should not depend on details. Details should depend on abstractions. +- "https://stackoverflow.com/questions/52857145/what-is-mean-by-abstractions-should-not-depend-on-details-details-should-depen" +- "https://softwareengineering.stackexchange.com/questions/401769/depend-on-abstractions-not-on-concretions-what-is-the-exact-meaning-of-this-t" +- "https://sonar.tools.pnet.ch/coding_rules?open=squid%3AS1319&rule_key=squid%3AS1319" +- "https://wikit.post.ch/display/ISA/Code+Formatting?focusedCommentId=791239536#comment-791239536" + +## Sonar is stupid +- "https://gitit.post.ch/projects/ZEWAS/repos/zewas/browse/zewas-process/src/main/java/ch/post/it/zewas/process/reportgenerator/sql/SqlReportGenerator.java?at=refs%2Ftags%2Fzewas-17.10.00.17#385" +- "https://gitit.post.ch/projects/ISA/repos/platform/pull-requests/156" + +## Plain Old Data (POD, POJO, DTO) +- "https://de.wikipedia.org/wiki/Plain_Old_Data_structure#PODs_in_Java" + +## Java enums +- [Do NOT use enum ordinals](https://jira.post.ch/browse/SDCISA-2212?focusedCommentId=1088884&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1088884) + +## C enums +- [Never Start Enum At Zero](https://gitit.post.ch/projects/ISA/repos/zarniwoop/pull-requests/5/overview?commentId=50182) + +## You SHOULD reinvent the wheel +- "https://blog.codinghorror.com/dont-reinvent-the-wheel-unless-you-plan-on-learning-more-about-wheels/" + +## Misc +- (Java Anti-Patterns) "https://www.odi.ch/prog/design/newbies.php" + +## Java Memory +- "youtube.com/watch?v=f2aNWtt0QRo" +- jvm GC statistics "https://stackoverflow.com/a/467366" + +## Yaml Is Bullshit +- "https://www.arp242.net/yaml-config.html#can-be-hard-to-edit-especially-for-large-files" + +## Goto Error Handling +- "https://dzone.com/articles/error-handling-via-goto-in-c" +- "https://www.cprogramming.com/tutorial/goto.html" +- "https://eli.thegreenplace.net/2009/04/27/using-goto-for-error-handling-in-c/" + +## Java Streams, forEach stupid +- "https://stackoverflow.com/a/20177092/4415884" +- "https://github.com/swisspush/gateleen/pull/426#discussion_r813752075" +- "https://github.com/swisspush/gateleen/blob/v1.1.61/gateleen-kafka/src/main/java/org/swisspush/gateleen/kafka/KafkaMessageSender.java#L21" +- performance long "https://m.youtube.com/watch?v=x5akmCWgGY0" +- think please ... "https://m.youtube.com/watch?v=hSfylUXhpkA" + +## The Only way to Format Dates ISO 8601 +- "https://xkcd.com/1179/" + +## Backward compatibility, Breaking Changes +- "https://www.redstar.be/backward-compatibility-in-software-development-what-and-why/" +- [thor](https://gitit.post.ch/projects/ISA/repos/fis-masterdata-api/pull-requests/17/overview?commentId=227703) + +## Performance DOES matter +- "https://github.com/swisspush/gateleen/pull/456#discussion_r844865066" +- [examples](https://m.youtube.com/watch?v=EpYr3T5VP6w) +- "https://jira.post.ch/browse/SDCISA-4714" +- "https://jira.post.ch/browse/SDCISA-8136" +- "https://jira.post.ch/browse/SDCISA-2876" +- "https://jira.post.ch/browse/SDCISA-9059" + +## Performance clang micro benchmarking +- "https://m.youtube.com/watch?v=nXaxk27zwlk" + +## POSIX shell language syntax +- "https://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html" + +## How to API design +- "https://m.youtube.com/watch?v=2xgplCQS1bY" + +## Posix c API design +- "https://lucumr.pocoo.org/2013/8/18/beautiful-native-libraries/" + +## API paisa-api 01.03.00.01 Breaking change ISAGD-6566 +- "https://gitit.post.ch/projects/ISA/repos/fis-api/pull-requests/9/overview?commentId=129349" +- "https://gitit.post.ch/projects/ISA/repos/user-identification-api/pull-requests/6/overview?commentId=130606" +- "https://gitit.post.ch/projects/ISA/repos/iobox-api/pull-requests/6/overview?commentId=129739" +- "https://gitit.post.ch/projects/ISA/repos/forms-api/pull-requests/6/overview?commentId=129437" +- "https://gitit.post.ch/projects/ISA/repos/communication-alarming-api/pull-requests/8/overview?commentId=129239" +- "https://gitit.post.ch/projects/ISA/repos/controlcenter-inquiry-api/pull-requests/7/overview?commentId=129212" +- "https://gitit.post.ch/projects/ISA/repos/timetable-export-api/pull-requests/9/overview?commentId=88705" + +## Apikana PaISA api contact email remove +- "https://gitit.post.ch/projects/ISA/repos/communication-phonebook-api/pull-requests/8/overview?commentId=149593" +- "https://gitit.post.ch/projects/ISA/repos/vehicle-api/pull-requests/9/overview?commentId=149660&action=view" + +## API Review Swagger Links +- Swagger link please 1 "https://gitit.post.ch/projects/ISA/repos/vending-transaction-api/pull-requests/6/overview?commentId=97141" +- Use them! "https://gitit.post.ch/projects/ISA/repos/vending-transaction-api/pull-requests/1/overview?commentId=48983" +- Not up-to-date "https://gitit.post.ch/projects/ISA/repos/deployment-masterdata-api/pull-requests/8/overview?commentId=78414" +- Swagger link please 2 "https://gitit.post.ch/projects/ISA/repos/timetable-registration-api/pull-requests/7/overview?commentId=98168" +- SwaggerUI broken "https://gitit.post.ch/projects/ISA/repos/vehiclelink-power-api/pull-requests/11/overview?commentId=95353" +- SwaggerUI broken "https://gitit.post.ch/projects/ISA/repos/vehicle-messaging-api/pull-requests/8/overview?commentId=189586" +- SwaggerUI broken "https://gitit.post.ch/projects/ISA/repos/vehicle-setup-api/pull-requests/32/overview?commentId=189587" +- parent paisa-api 01.04.00.00 is broken "https://gitit.post.ch/projects/ISA/repos/timetable-registration-api/pull-requests/7/overview?commentId=98172" + +## Primitive, restricted API +- "https://gitit.post.ch/projects/ISA/repos/vehicle-setup-api/pull-requests/14/overview?commentId=61969&action=view" + +## API ugly definitions.ref$ array +- "https://gitit.post.ch/projects/ISA/repos/vehicle-profile-api/pull-requests/17/overview?commentId=173135" + +## api order property field summary top +- "https://gitit.post.ch/projects/ISA/repos/customer-swisspass-api/pull-requests/1/overview?commentId=66513" +- "https://gitit.post.ch/projects/ISA/repos/vehiclelink-power-api/pull-requests/9/overview?commentId=80215" + +## API Design Topic Subject Spread multiple several repos +- "https://gitit.post.ch/projects/ISA/repos/vehicle-setup-api/pull-requests/23/overview?commentId=82379" + +## API Ignore documentation +- "https://gitit.post.ch/projects/ISA/repos/customer-api/pull-requests/8/overview?commentId=88741" + +## Documentation Noise/Clutter Comments, APIs (no response was specified) +- Explanation "https://gitit.post.ch/projects/ISA/repos/deployment-masterdata-api/pull-requests/12/overview?commentId=187097" +- Bad: "https://gitit.post.ch/projects/ISA/repos/vending-twint-api/pull-requests/1/overview?commentId=87895" +- Good: "https://gitit.post.ch/projects/ISA/repos/vending-transaction-api/browse/src/rest/openapi/api.yaml?at=refs%2Ftags%2Fvending-transaction-api-01.00.00.00#79-80,96-98,112-113,130-131,162-164,197-199,230-232,250-252,270-272,287-288" +- Damn It! write descriptions, stupid! "https://gitit.post.ch/projects/ISA/repos/vending-payment-api/pull-requests/5/overview?commentId=106020" + +## JenkinsfileRelease Api pipeline broken latest version +- "https://jira.post.ch/browse/SDCISA-3378" + +## PRs and reviews are important +- "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/251/overview?commentId=87095" +- "https://gitit.post.ch/projects/ISA/repos/system-status-api/pull-requests/7/overview?commentId=108200" +- "https://gitit.post.ch/projects/ISA/repos/communication-modem-api/pull-requests/7/overview?commentId=103394" + +## Preflux Null Check Useless? +- "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/193/overview?commentId=66746" + +## bash pipeline exit codes (educational) +- "https://www.shellscript.sh/tips/pipestatus/" + +## Command Escaping And Injection +- "https://jira.post.ch/browse/SDCISA-3602" + +## logger noise spam verbose +- [fix the REAL problem please](https://jira.post.ch/browse/SDCISA-3637?focusedCommentId=1252741&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1252741) + +## Bashisms +- "https://askubuntu.com/questions/1059265/whats-the-problem-with-bashisms" +- "https://gitit.post.ch/projects/ISA/repos/wowbagger-kickstart/pull-requests/38/overview?commentId=208533" +- "https://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html" + +## YAGNI (but also KISS and DRY) +- "https://medium.com/swlh/yagni-and-dry-the-kiss-of-death-for-your-software-project-cfd44b0654b6#fc82" + +## How to format method parameters +- "https://gitit.post.ch/projects/ISA/repos/god-backend/pull-requests/281/overview?commentId=210650" + +## Stringly Typed +- "https://jira.post.ch/browse/SDCISA-9678" +- "https://devcards.io/stringly-typed" +- "https://softwareengineering.stackexchange.com/a/365344/306800" + +## Automatically implicit mkdir parents is bullshit +- "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/490/overview?commentId=213152" + +## Privacy EBanking ist ein Witz +- "https://m.youtube.com/watch?v=KopWe2ZpVQI" + +## JavaScript EventLoop Visual Explained +- "https://m.youtube.com/watch?v=cCOL7MC4Pl0" + +## How to write comments. +- "https://m.youtube.com/watch?v=yhF7OmuIILc" + +## Danfoss einstellen +- "https://m.youtube.com/watch?v=VdIheN-c7G0" +- "https://m.youtube.com/watch?v=3fh9qm-ljA8" + +## java slf4j parameterized logging log4shell +- "https://www.tutorialspoint.com/slf4j/slf4j_parameterized_logging.htm" +- "https://beaglesecurity.com/blog/vulnerability/format-string-vulnerability.html" +- "https://nvd.nist.gov/vuln/detail/CVE-2021-44228" + +## slf4j logger logging paisa platform alice +- logger fail "https://jira.post.ch/browse/SDCISA-9903" + +## java assert +- how to enable "https://stackoverflow.com/a/68893479/4415884" +- what are they for "https://stackoverflow.com/a/298933/4415884" +- I dont care "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/505/overview?commentId=219173" + +## Mensch verblödet, modern tech, IQ, dumm, test +- "https://m.youtube.com/watch?v=_dAtdSVeiLM" + +## MultiThreading vertx gateleen +- "https://jira.post.ch/browse/SDCISA-9845?focusedCommentId=1617020&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1617020 + +## MultiThreading concurrency atomic volatile +- "https://gitit.post.ch/projects/ISA/repos/halfrunt/pull-requests/27/overview?commentId=105019" +- [volatile](https://gitit.post.ch/projects/ISA/repos/houston/pull-requests/367/overview?commentId=155920) +- [locking](https://gitit.post.ch/projects/ISA/repos/houston/pull-requests/367/overview?commentId=155916) + +## MultiThreading Dead Lock +- [Zarquon IO stream read write](https://gitit.post.ch/projects/ISA/repos/zarquon/pull-requests/2/overview?commentId=61285) + +## Uncle Bob - Why Are Programmers slow +- "https://youtu.be/G6HyEeEcB-w" + +## Backward compatible Support old systems +- (32-bit CPU) "https://itsfoss.com/32-bit-os-list/" + +## Resilience limit upper bound +- [Thought OOM](https://jira.post.ch/browse/SDCISA-10021) +- [Thought DB streams](https://wikit.post.ch/pages/viewpage.action?pageId=993270063&focusedCommentId=993272727#comment-993272727) + +## Bugs, Frameworks, Dependencies include them all +- "https://medium.com/dinahmoe/escape-dependency-hell-b289de537403" +- "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/119/overview?commentId=46245" + +## Input validation +- WontDo "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/512/overview?commentId=222672" + +## Git for windoof CRLF broken +- "https://wikit.post.ch/display/ISA/Code+Formatting?focusedCommentId=791239536#comment-791239536" + +## EddieName VS Hostname VS FQDN +- "https://gitit.post.ch/projects/ISA/repos/deployment-pipeline-api/pull-requests/2/overview?commentId=50191" + +## post architektur Semver +- "https://wikit.post.ch/x/oeQKJw#id-20201111I2ArchitectureMeetingProtocol-GitOpsWorkgroup:ReferenceArchitecturePrincipleforVersioning" + +## Early-return error handling +- "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/226/overview?commentId=73892" + +## Stage Env Specific Conditional TimeBomb +- "https://gitit.post.ch/projects/ISA/repos/preflux/pull-requests/231/overview?commentId=75315" + +## Implicit/Explicit Encoding charset java String getBytes +- "https://gitit.post.ch/projects/ISA/repos/halfrunt/pull-requests/10/overview?commentId=76149" +- "https://wikit.post.ch/pages/viewpage.action?pageId=193593428#JavaLanguage-Encoding" + +## FileLogging is a MUST have (kibana is bullsh**) +- [example](https://jira.post.ch/browse/SDCISA-8382?focusedCommentId=1554435&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1554435) +- [warning](https://jira.post.ch/browse/SDCISA-7230?focusedCommentId=1550476&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-1550476) + diff --git a/doc/note/ssh/ssh-setup.txt b/doc/note/ssh/ssh-setup.txt new file mode 100644 index 0000000..8bb5fb9 --- /dev/null +++ b/doc/note/ssh/ssh-setup.txt @@ -0,0 +1,49 @@ + +SSH Setup & Key Management +========================== + +## Create New Ssh Key + +Create "path/to/key" and "path/to/key.pub" as a 2048 bit RSA with +"your comment" as comment (you can skip "-C comment" if you dont care). + +```sh +ssh-keygen -t rsa -b 2048 -f path/to/key -C "your comment" +``` + + +## Change Passphrase + +```sh +ssh-keygen -p -f path/to/key +``` + +NOTE: Just hitting enter when asked for the new one will remove the passphrase. + + +## Inspect keys + +Print public key hash: +```sh +ssh-keygen -l -f path/to/key.pub +``` + +Print public key hash as md5: +```sh +ssh-keygen -E md5 -l -f path/to/key.pub +``` + +```sh +ssh-keygen -y -f path/to/key > path/to/key.pub +``` + + +## TODO + + -e This option will read a private or public OpenSSH key file + and print to stdout a public key in one of the formats + specified by the -m option. The default export format is + “RFC4716”. This option allows exporting OpenSSH keys for + use by other programs, including several commercial SSH + implementations. + diff --git a/doc/note/ssh/ssh-usage.txt b/doc/note/ssh/ssh-usage.txt new file mode 100644 index 0000000..503aca7 --- /dev/null +++ b/doc/note/ssh/ssh-usage.txt @@ -0,0 +1,40 @@ + +SSH Usage Examples +================== + + +## Download Files + +Can help when downloading log files: tar --ignore-failed-read + +(TODO this cmd looks broken) + + ssh HOST -- "cd /data/instances/default/logs && tar -cz foo/bar.log*" > ARCH_NAME.tgz + + +## Upload Files + + tar cz file1 file2 file3 | ssh USER@HOST 'tar -C /dir/on/remote xz' + + +## Port-Forwarding + +Example: When request on "127.0.0.1:1234", then forward that +request to "localhost:7080" on HOST. + + ssh -L 127.0.0.1:1234:localhost:7080 HOST + + +## Run Cmd via jumphost + +Source: "https://www.cyberciti.biz/faq/linux-unix-ssh-proxycommand-passing-through-one-host-gateway-server/" + +### Based on -tt but without tt +ssh MYJMPHOST ssh MYHOST -- echo "\"foo\ \ \ \ bar\"" > out.txt + +### "seems" to work. But somehow my binary data through stdio is broken. +ssh -tt MYJMPHOST ssh -tt MYHOST echo foo bar + +### This tries to ssh directly to MYHOST (not what I'm searching for) +ssh -o "ProxyJump MYJMPHOST" MYHOST -- echo foo bar + diff --git a/doc/note/systemd/systemd.txt b/doc/note/systemd/systemd.txt new file mode 100644 index 0000000..cc67d58 --- /dev/null +++ b/doc/note/systemd/systemd.txt @@ -0,0 +1,33 @@ + +Systemd +================ + +Setup a service on a per-user basis: + ++------------------------------------------------------------------------------ +| $ cat ~/.config/systemd/user/andy-zarquon.service +| +| ; [Unit] +| ; Description=QuickNDirty Zarquon instance for andis tests. +| ; [Service] +| ; ExecStart=java -jar /tmp/andy-as-isa/zarquon.jar +| ; [Install] +| ; WantedBy=default.target ++------------------------------------------------------------------------------ + ++------------------------------------------------------------------------------ +| $ cat /etc/systemd/system/andy-zarquon.service +| +| [Unit] +| Description=QuickNDirty Zarquon instance for andis tests. +| +| [Service] +| Type=simple +| User=isa +| ExecStart=/usr/bin/sh -c '. /etc/profile.d/paisa_env.sh && echo "isa2016"|java -Dserver.port=7091 -jar /tmp/andy-as-isa/zarquon.jar 2>&1 > /tmp/andy-as-isa/zarquon.log' +| +| ; Autostart NOT wanted +| ; [Install] +| ; WantedBy=default.target ++------------------------------------------------------------------------------ + diff --git a/doc/note/tar/tar.txt b/doc/note/tar/tar.txt new file mode 100644 index 0000000..6413a9c --- /dev/null +++ b/doc/note/tar/tar.txt @@ -0,0 +1,33 @@ + +Tar +================ + +For specific use cases see also doc for eg "openshift", "docker", etc. + + +## Backup With Ignoring Useless Files + +Use -x (--exclude=) arg or -X (--exclude-from=). + +For example to exclude VCS stuff: + + tar --exclude-backups --exclude-vcs-ignores --exclude-vcs + +Or with custom rules: + + tar -X exclude-list.txt + +Example "exclude-list.txt": ++----------------------------------------------------------------------- +| target +| node_modules +| *.a +| *.class +| *.o ++----------------------------------------------------------------------- + + +## Extract By Pattern + +TBD + diff --git a/doc/note/tcpdump/tcpdump.txt b/doc/note/tcpdump/tcpdump.txt new file mode 100644 index 0000000..163c921 --- /dev/null +++ b/doc/note/tcpdump/tcpdump.txt @@ -0,0 +1,60 @@ + +Tcpdump +================ + + +## Realtime Download: + + scriptlee -W OcChunkDownload.lua -n OC_PROJ --scan-delay 10 --workdir ../../../../../tmp --pod-pattern 'houston.%d' --file-pattern 'houston.STAGE.tcp.*gz' --skip 1 + + + +## Base (inclusive blacklist brox, fluentd, ...): + +redis=6379, brox=7022, fluentd=7099 + + cd /tmp && timeout --foreground -s INT 180 tcpdump -ni any -C 50M -W 999 -w houston-STAGE-tcp-`date -u +%Y%m%d-%H%M%S`.pcap "not port 443 and not port 6379 and not port 7022 and not port 7099" -z gzip + + + +## pcap cli PreProcessing + +Tips: "https://chrissanders.org/2018/06/large-captures4-filter-whittling/" + + mergecap.exe -a -w OUTFILE INFILES_GLOB + + -Y 'http.request.uri.query contains "expand"' + -Y 'http.time < 2.0 or http.request' + + + +## Accept HTTP POST requests: + + "tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x504F5354" + + + +## Copy result to local machine (the boring way) + + oc rsync <pod-name>:/remote/dir/filename . + + + +## Special filters + + "tcp[tcpflags] & (tcp-syn|tcp-ack|tcp-fin|tcp-rst) != 0" + + "ip 1.2.3.4" + + "net 172.18.0.0/16" + + + +## Extract hosts file from DNS traffic + +Not perfect because needs manual fine-tuning. But can be helpful anyway. + + -Y 'dns.a and dns.resp.name' -Tfields -edns.a -edns.resp.name + +Vielleicht auch mal option "-zhosts" ausprobieren. Sollte auch sowas tun. + diff --git a/doc/note/tcpdump/wireshark.txt b/doc/note/tcpdump/wireshark.txt new file mode 100644 index 0000000..1c498f2 --- /dev/null +++ b/doc/note/tcpdump/wireshark.txt @@ -0,0 +1,13 @@ + +Wireshark +================ + + +## Slow http responses + + (http and frame.time_delta_displayed > 1) + + (http.response && tcp.time_delta > 5) + + + |