Linux ENV Setings ---- /etc/profile /etc/bashrc ~/.bashrc ~/.bash_profile

export PATH=$PATH:/usr/local/bin/nodeSetup/

Any Folder Path we put on PATH is scanned for Executables

~/.bash_profile

~/ .bashrc

~/.profile

/etc/sudoers

/etc/yum.conf

/etc/os-release

/etc/hosts

/etc/hosts.allow

/etc/fstab

/etc/shells

/etc/passwd

/etc/group

/etc/shadow

/etc/profile

etc/bashrc      [/etc/profile.d]

/etc/bashrc          # Functions and aliases go in /etc/bashrc

/etc/profile            # System wide environment and startup programs, for login setup + Environment stuff (It sources/executes shell in /etc/profile.d)

/etc/profile.d        # It's much better to create a custom.sh shell script in  /etc/profile.d/ to make custom changes to your environment 

~/.bash_profile    # User specific environment and startup programs    #PATH=$PATH:$HOME/.local/bin:$HOME/bin       #export PATH --- It sources(executes)  ~/.bashrc

~/.bashrc              #Get the aliases and functions                                              

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

/etc/profile file is used to set system wide environmental variables on users shells. 

/etc/profile is the system wide version of .bash_profile.

/etc/bashrc for Red Hat and /etc/bash.bashrc in Ubuntu is the system wide version of .bashrc.

.bashrc file in your home directory. 

This file is meant for setting command aliases and functions used by bash shell users

.bash_profile or .profile - in  your home directory.

These files are used to set environmental items for a particular user's shell

The difference is simple, 

/etc/profile is executed only for interactive shells 

/etc/bashrc is executed for both interactive and non-interactive shells.

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

For User specific Stuff, You can put aliases in ~/.bashrc and ~/.bash_profile sources it , but ENV Paths etc should be put in ~/.bash_profile

For Stuff relevant to all , You should put stuff in custom shell inside /etc/profile.d 

https://shreevatsa.files.wordpress.com/2008/03/bashstartupfiles1.png

https://bencane.com/2013/09/16/understanding-a-little-more-about-etcprofile-and-etcbashrc/

The importance of using a login shell is that any settings in /home/user/.bash_profile will get executed.

Linux A-Z Gyaan

 https://www.digitalocean.com/community/tutorials/angular-query-parameters

https://www.concretepage.com/angular-2/angular-2-4-child-routes-and-relative-navigation-example#:~:text=Child%20routes%20can%20have%20their,outlet%2C%20children%2C%20loadChildren%20etc.&text=Router%20supports%20relative%20path%20using%20ActivatedRoute%20.

https://appdividend.com/2019/12/16/angular-form-control-example/

https://malcoded.com/posts/angular-custom-directives/

https://www.redhat.com/sysadmin/alternatives-command

https://access.redhat.com/solutions/505983#:~:text=PS1%20is%20a%20primary%20prompt,the%20%2Fetc%2Fbashrc%20file.

https://unix.stackexchange.com/questions/1373/how-do-i-switch-from-an-unknown-shell-to-bash#:~:text=You%20type%20in%20bash%20.,by%20editing%20%2Fetc%2Fpasswd%20.

https://www.freecodecamp.org/news/linux-command-line-bash-tutorial/

https://itsfoss.com/apt-vs-apt-get-difference/

https://askubuntu.com/questions/1190717/when-to-run-sudo-apt-update-and-when-sudo-apt-update-sudo-apt-upgrade

https://www.freecodecamp.org/news/symlink-tutorial-in-linux-how-to-create-and-remove-a-symbolic-link/

https://www.tecmint.com/remove-package-with-dependencies-using-yum/amp/

https://phoenixnap.com/kb/centos-uninstall-remove-package

https://stackoverflow.com/questions/29964042/how-to-remove-old-version-of-java-and-install-new-version

https://www.thegeekdiary.com/how-to-work-with-multiple-java-versions-under-linux/

https://www.lifewire.com/alternatives-linux-command-4091710

https://linuxize.com/post/how-to-add-directory-to-path-in-linux/

https://kb.iu.edu/d/acec

https://linuxhint.com/update_alternatives_ubuntu/

https://www.redhat.com/sysadmin/alternatives-command

https://www.digitalocean.com/community/tutorials/ssh-essentials-working-with-ssh-servers-clients-and-keys

https://www.ssh.com/academy/ssh/host-key

https://superuser.com/questions/437330/how-do-you-add-a-certificate-authority-ca-to-ubuntu/719047#719047

https://www.google.com/search?q=pem+linux+full+form&client=ms-android-oppo&sxsrf=ALeKk027xsSkCVYclkcJoeq4bbZA0X4big%3A1622683432717&ei=KC-4YK6gK_OM4-EPzOWZmAQ&oq=pem++linux+full&gs_lcp=ChNtb2JpbGUtZ3dzLXdpei1zZXJwEAEYATIGCAAQFhAeMgUIIRCgATIFCCEQoAE6BAgjECc6BggAEAcQHjoICAAQCBANEB46BwghEAoQoAFQrghYoDZgxz5oAHAAeACAAYECiAG_F5IBBjAuMTAuNZgBAKABAcABAQ&sclient=mobile-gws-wiz-serp

https://www.tecmint.com/dpkg-command-examples/amp/

https://en.m.wikipedia.org/wiki/List_of_Linux_distributions

https://www.google.com/search?q=dnf+yum+difference&oq=dnf+yum&aqs=chrome.1.69i57j0l4.7585j0j4&client=ms-android-oppo&sourceid=chrome-mobile&ie=UTF-8

https://github.community/t/the-difference-between-forking-and-cloning-a-repository/10189

https://superuser.com/questions/740219/difference-between-apt-get-and-dpkg

https://www.tecmint.com/20-linux-yum-yellowdog-updater-modified-commands-for-package-mangement/

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/deployment_guide/sec-managing_yum_repositories

https://danielmiessler.com/study/fedora_redhat_centos/

https://itsfoss.com/centos-stream-fiasco/

https://blog.centos.org/2020/12/future-is-centos-stream/

https://unix.stackexchange.com/questions/52707/difference-between-chmod-775-and-chmod-2755

https://www.peachpit.com/articles/article.aspx?p=659655&seqNum=3

https://stackoverflow.com/questions/635869/can-yum-tell-me-which-of-my-repositories-provide-a-particular-package

https://www.cyberciti.biz/tips/how-do-i-find-out-what-shell-im-using.html

https://www.peachpit.com/articles/article.aspx?p=659655&seqNum=4

https://www.linuxfromscratch.org/lfs/view/9.1/chapter06/procps-ng.html

https://dzone.com/articles/how-to-edit-a-yaml-azure-devops-pipeline

https://docs.microsoft.com/en-us/azure/devops/pipelines/yaml-schema?view=azure-devops&tabs=example%2Cparameter-schema

https://learnxinyminutes.com/docs/yaml/

https://docs.microsoft.com/en-us/azure/devops/pipelines/customize-pipeline?view=azure-devops

https://docs.microsoft.com/en-us/azure/devops/pipelines/build/ci-build-git?view=azure-devops&tabs=yaml

http://www.mattruma.com/create-a-single-build-release-pipeline-for-multiple-branches/

CHMOD CHOWN

https://stackoverflow.com/questions/35061499/how-to-display-column-headers-for-ls-l-command-in-unix-linux

https://phoenixnap.com/kb/linux-file-permissions

https://opensource.com/article/19/8/linux-chmod-command

[root@az-cvs-li-re-001 rage]# chmod ugo+rwx test

[root@az-cvs-li-re-001 rage]# ls -l|grep test

drwxrwxrwx   2 root root        6 Jun  1 09:53 test

[root@az-cvs-li-re-001 rage]# chmod u+rwx,g-rwx,o+rw-x test

[root@az-cvs-li-re-001 rage]# ls -l|grep test

drwx---rw-   2 root root        6 Jun  1 09:53 test

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

https://phoenixnap.com/kb/linux-chown-command-with-examples

chown [OPTIONS] USER[:GROUP] FILE(s)

[OPTIONS] – the command can be used with or without additional options.

[USER] – the username or the numeric user ID of the new owner of a file.

[:] – use the colon when changing a group of a file.

[GROUP] – changing the group ownership of a file is optional.

FILE – the target file.

[rage@az-cvs-li-re-001 ~]$ ls -la test

total 4

drwx---rw-   2 rage root    6 Jun  1 09:53 .

drwx------. 36 rage rage 4096 Jun  1 09:53 ..

[rage@az-cvs-li-re-001 ~]$ chown :rage test

[rage@az-cvs-li-re-001 ~]$ ls -la test

total 4

drwx---rw-   2 rage rage    6 Jun  1 09:53 .

drwx------. 36 rage rage 4096 Jun  1 09:53 ..

Full YAML Tutorial - Nested Array - Nested JSON

https://codebeautify.org/yaml-to-json-xml-csv/cb162ac2?restoreDataAfter=true       [VImp]

https://www.cloudbees.com/blog/yaml-tutorial-everything-you-need-get-started/

https://www.json2yaml.com/

Array, List, Map, Scalar, Boolean , Number
Quotes are optional
It automatically converts Data type to Boolean, String
List has dash followed by space

--- 3 Dash means separate YAML Document
Multiline with Formatting Preserved -    Use    Pipe    |
Multiline with Formatting Ignored -    Use   Redirection Operator  >

Chomp Modifiers

Multiline values may end with whitespace, and depending on how you want the document to be processed you might not want to preserve it. YAML has the strip chomp and preserve chomp operators. To save the last character, add a plus to the fold or block operators.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

friends: - Karan - Sahil - Ashish - Rahul - GodGoddess: Brahma: Saraswati Vishnu: Lakshmi Mahesh: Parvati school: Model Academy place: Jammu VitalStats: Length: 5 Foot Attributes: - Black Complexion - Tall - curly Hair - Intelligence: IQ: 150 EQ: 100 - Hobbies: [Hollywood, "Pranks", "Comics"] LongStringNoFormatting: | All right! Okay! Fine! LongStringPreseveFormatting: > All right! Okay! Fine!

{
  "array": [
    {
      "description": "work"
    },
    "Hola",
    123,
    [
      "karan",
      "sumit"
    ],
    {
      "description": "work",
      "URL": "https://www.digitalocean.com/"
    },
    [
      {
        "description": "work",
        "URL": "https://www.digitalocean.com/"
      }
    ],
    [
      {
        "desciption": "tutorials"
      },
      {
        "URL": "www.digitalocean.com"
      }
    ]
  ]
}

1 2 3 4 5 6 7 8 9 10 11 12 13

--- array: - description: work - Hola - 123 - - karan - sumit - description: work URL: https://www.digitalocean.com/ - - description: work URL: https://www.digitalocean.com/ - - desciption: tutorials - URL: www.digitalocean.com

My Inventions - Nikola Tesla

 http://www.tfcbooks.com/special/mi_link.htm

Useful URLS - Linux - 24 May 2021

 http://localhost:4200/programmaticRoute/relative

https://stackblitz.com/edit/kk-angular-gen-project?file=src%2Fapp%2Fcomponents%2Fannotator-dashboard%2Fannotator-dashboard.component.spec.ts

https://www.netjstech.com/2020/08/navigate-route-programmatically-angular.html

https://angular.io/guide/router

https://www.digitalocean.com/community/tutorials/angular-query-parameters

https://serverfault.com/questions/62026/how-to-know-from-which-yum-repository-a-package-has-been-installed

https://www.google.com/search?q=remove+bash+history&rlz=1C1GCEA_enIN943IN943&oq=remove+bash&aqs=chrome.2.0j69i57j0l2j0i20i263j0l5.5872j0j7&sourceid=chrome&ie=UTF-8

https://phoenixnap.com/kb/how-to-create-sudo-user-on-ubuntu

https://devconnected.com/how-to-add-user-to-sudoers-on-ubuntu-20-04/

https://www.geeksforgeeks.org/passwd-command-in-linux-with-examples/

https://linuxize.com/post/usermod-command-in-linux/

https://www.differencebetween.com/difference-between-adduser-and-vs-useradd/#:~:text=The%20difference%20between%20adduser%20and%20useradd%20is%20that%20adduser%20is,utility%20command%20to%20add%20users.

https://www.howtogeek.com/50787/add-a-user-to-a-group-or-second-group-on-linux/#:~:text=To%20add%20an%20existing%20user,user%20you%20want%20to%20add.

https://linuxize.com/post/how-to-list-users-in-linux/

https://linuxize.com/post/how-to-list-groups-in-linux/

https://www.ibm.com/docs/en/ibm-mq/9.1?topic=windows-creating-managing-groups-linux

https://linuxize.com/post/how-to-add-user-to-group-in-linux/

https://www.networkworld.com/article/3409781/mastering-user-groups-on-linux.html#:~:text=There%20are%20actually%20two%20types,an%20account%20is%20set%20up.&text=Secondary%20groups%20are%20those%20that,the%20%2Fetc%2Fgroup%20file.

https://linuxize.com/post/how-to-delete-users-in-linux-using-the-userdel-command/

https://www.cyberciti.biz/faq/linux-list-users-command/

https://www.ibm.com/docs/en/aix/7.2?topic=passwords-using-etcpasswd-file

https://www.cyberciti.biz/faq/understanding-etcpasswd-file-format/

https://www.cyberciti.biz/faq/understanding-etcgroup-file/

https://www.digitalocean.com/community/tutorials/how-to-view-system-users-in-linux-on-ubuntu#:~:text=Every%20user%20on%20a%20Linux,line%20describes%20a%20distinct%20user.

https://www.cyberciti.biz/faq/how-to-delete-group-in-linux-using-groupdel-command/

https://www.journaldev.com/39787/linux-delete-group-groupdel-command

https://www.howtogeek.com/50787/add-a-user-to-a-group-or-second-group-on-linux/

https://linuxize.com/post/how-to-create-groups-in-linux/#:~:text=To%20create%20a%20new%20group,by%20the%20new%20group%20name.&text=The%20command%20adds%20an%20entry,adding%20users%20to%20the%20group%20.

https://linuxize.com/post/linux-chown-command/

https://www.baeldung.com/linux/chown-chmod-permissions

https://www.tecmint.com/add-users-in-linux/#:~:text=To%20create%20user's%20without%20their,shilpi'%20without%20a%20home%20directory.

https://www.tecmint.com/delete-remove-a-user-account-with-home-directory-in-linux/

https://phoenixnap.com/kb/fix-connection-reset-by-peer-ssh-error

https://devconnected.com/how-to-list-users-and-groups-on-linux/#:~:text=In%20order%20to%20list%20users,navigate%20within%20the%20username%20list.

https://phoenixnap.com/kb/grep-multiple-strings

https://unix.stackexchange.com/questions/106593/what-do-the-characters-y-d-n-mean

https://stackoverflow.com/questions/305035/how-to-use-ssh-to-run-a-local-shell-script-on-a-remote-machine

https://unix.stackexchange.com/questions/115917/why-is-bash-not-storing-commands-that-start-with-spaces

Microsoft Windows Terminal - Multiple Tabs Console

Microsoft Windows Terminal - Multiple Tabs Console 

Download Links

https://github.com/microsoft/terminal/releases/tag/v1.8.1092.0

https://github.com/microsoft/terminal#readme

Alternate Download URL

https://www.microsoft.com/en-us/p/windows-terminal/9n0dx20hk701?activetab=pivot:overviewtab

https://helpdeskgeek.com/how-to/use-multiple-tabs-in-the-windows-command-prompt/

5 Software Utilities