shell_commands.txt

/* This has all the Git commands */

Cd . 	will take to the current directory
Cd.. 	will take to the parent directory
Start . 	will open the current folder in explorer
Ls -la 	will show a list of files along with the hidden files
Cd --help 	will give a help on a given command
Touch 	 used to create a new file
Echo 	used to print a value
Echo "Hello world" > another-file.txt 	will write "Hello world" to the file
Cat 	 used to read the contents of a file
Echo "Another world" >> another-file.txt 	 will append "Another world" to the file
Nano new-file.txt 	This will open the file in edit mode
Ctrl+O + Enter	Save the contents of the file
Ctrl + x	To exit
Rm	Remove file
Rm -rf	Remove folder and files within it

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4 Object Types in GIT :
Blob :  Git stores files
Tree : Stores information about directories
Commit : Stores different versions of the project
Annotated Tag : It is a pointer to a specific commit

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There are several HASH functions like MD5, SHA1, SHA256, SHA384,SHA512
The length of the output a different for each of them
Git uses SHA1 - 160 bit - Base 16 - Hex value
HASH is one way (from HASH we cant get input) and for the same input , we always get same output
2^160 	is the number of files that can be saved on a GIT repository
Echo "Hello Git" |git hash-object --stdin -w	Creates a Hash-object with the standard input as "Hello , Git". It produces a hash output
Git hash-object	It is used to create a new Hash Object
Git cat-file -p <hash>	Contents of the Object
Git cat-file -s <hash>	Size of the Object
Git cat-file -t <hash>	Type of the Object