CI CD Tutorial - Continuous Integration

CI / CD Pipeline using Github integration with AWS codePipeline.
Pipeline for deploying Angular app to AWS S3 bucket from Github.
#AWS #codePipeline #codeDeploy #codeBuild #codeCommit

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Linux Tutorial | Access Control List ( ACL ) In Linux | Linux File Perm...

What is ACL ?

Access control list (ACL) provides an additional, more flexible permission mechanism for file systems. It is designed to assist with UNIX file permissions. ACL allows you to give permissions for any user or group to any disc resource.

Linux Tutorial | Special Permissions in Linux | Linux File Permissions P...

1)  Suid : SUID is a special permission assigned to a file. These permissions allow the file to be executed with the privileges of the owner. 

If a file was owned by the root user and has the setuid bit set, no matter who executed the file it would always run with root user privileges.

Example:

chmod u+s FileName

-rwsr-xr-x 1 root test-group 16720 Apr 26 16:36 click

2) Sgid (Set Group ID): When the Set Group ID bit is set, Every file created in the group will be created with group ownership and also executed files with the group ownership no matters who execute it.

Example: 

chmod g+s direcotryName

drwxr-sr-x 2 root test-group  4096 Apr 26 16:36 permission

3) Sticky bit :  Files can be protected in a directory from getting removed by other users who do not own it by preventing it with sticky bit. It is displayed at the same location as the x permission for others.

Example:
chmod +t  directoryName

drwxr-xr-t 2 root test-group  4096 Apr 24 18:56 permission

Linux Tutorial | File Permission in Linux | Linux File Permissions Part-1

What is POSIX Permissions ?
POSIX permissions are the standards that define how Unix interacts with applications. Among other things, POSIX permissions define a permission structure for accessing files and folders.


What are linux permissions and how can we understand them ?
Everything in linux is file or directory.And we have 3 levels of permissions on each file / directory and 3 types of permissions on each file / directory.

Three levels of permissions are:
user/owner – The Owner permissions apply only the owner of the file or directory, they will not impact the actions of other users.
group – The Group permissions apply only to the group that has been assigned to the file or directory, they will not effect the actions of other users.
all users – The All Users permissions apply to all other users on the system, this is the permission group that you want to watch the most.

Three types of  permissions :
read – The Read permission refers to a user’s capability to read the contents of the file.
write – The Write permissions refer to a user’s capability to write or modify a file or directory.
execute – The Execute permission affects a user’s capability to execute a file or view the contents of a directory.

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