Merge branch 'master' into branch1

Byobu_CheatSheet.md

@@ -33,4 +33,12 @@ Byobu/Tmux:
 	#Kill split in focus
 		Ctrl + F6
 
-	 
+	#Join all splits
+		Shift + F5
+
+	#Kill the current window
+		Ctrl + A + K
+
+	#Move focus to next split
+		Shift + F3
+

Elasticsearch_CheatSheet.md

@@ -59,3 +59,10 @@
 
         #Check pending tasks
                 curl -XGET http://localhost:9200/_cat/pending_tasks?v
+          
+        #Query using URL parameters
+                curl -X GET http://localhost:9200/samples/_search?q=school:Harvard
+                
+        #List index mapping
+                curl -X GET http://localhost:9200/samples
+

Flexbox_CheatSheet.md

@@ -0,0 +1,67 @@
+
+
+	#Allow Flexbox display
+		display: flex;
+
+	#Align items horizontally
+		justify-content:
+			#Options include:
+				flex-start; - items align to left of container
+				flex-end; - items align to right of container
+				center; - items align at center of container
+				space-between; - equal spacing between items, with first at start and final at end
+				space-around; - equal spacing around items
+				space-evenly; - even spacing around items with a full space at either end
+
+	#Align items vertically
+		align-items:
+			#Options include:
+				flex-start; - items align to top of container
+				flex-end; - items align to bottom of container
+				center; - items align to vertical center of container
+				baseline; - items align to baseline of container
+				stretch; - items stretched to fit
+
+	#Change direction
+		flex-direction:
+			#Options include:
+				row; - items placed the same as text direction
+				row-reverse; - items placed opposite to text direction
+				column; - items are placed top to bottom
+				column-reverse: items are placed bottom to top
+
+	#Align specific item
+		align-self:
+			#Options include same values as 'align-items' but for a specific item
+			#Overrides 'align-items'
+
+	#Wrap items
+		flex-wrap:
+			#Options include:
+				nowrap: every items is fit to a single line
+				wrap: items wrap around to additional lines
+				wrap-reverse: items wrap around to additional lines in reverse
+
+	#Combination of direction and wrap
+		flex-flow:
+			#Options include:
+				row wrap; - sets rows and wraps them
+				row nowrap;
+				row reverse nowrap;
+				column reverse;
+				column wrap-reverse
+				column wrap
+
+	#Space multiple lines a certain way
+		align-content:
+			#Options include:
+				flex-start; - lines packed at top of container
+				flex-end; - lines packed at bottom of container
+				center; lines packed at vertical center of container
+				space-between: lines display with equal spacing between them
+				space-around: lines display with equal spacing around them
+				stretch: lines are stretched to fit the container
+
+	#Order items
+		order:
+			#Can be positive or negative. Default order value of 0.

Git_CheatSheet.md

@@ -178,3 +178,6 @@
 
 	#Stashing everything (including ignored files)
 		git stash --all
+
+	#Push code from working branch to another branch 
+		git push origin branch1: branch2

InfluxDB_Cheatsheet

@@ -0,0 +1 @@
+

JavaScript_CheatSheet.md

@@ -0,0 +1,126 @@
+JavaScript:
+
+    # Declare a variable using let or const.
+        let myVariable = 'hello';
+        const myConstant = 42;
+
+    # Log a message to the console.
+        console.log('Hello, world!');
+
+    # Alert a message to the user.
+        alert('Hello, user!');
+
+    # Prompt the user for input.
+        let userInput = prompt('What is your name?');
+
+    # Declare a function.
+        function myFunction(arg1, arg2) {
+            Function body goes here.
+        }
+
+    # Call a function.
+        myFunction(value1, value2);
+
+    # Declare an object.
+        let myObject = {
+            key1: 'value1',
+            key2: 'value2',
+            key3: 'value3',
+        };
+
+    # Access an object's property.
+        myObject.key1;
+
+    # Declare an array.
+        let myArray = [1, 2, 3, 4];
+
+    # Access an array's element.
+        myArray[0];
+
+    # Declare a for loop.
+        for (let i = 0; i < myArray.length; i++) {
+            Loop body goes here.
+        }
+
+    # Declare a while loop.
+        while (condition) {
+            Loop body goes here.
+        }
+
+    # Declare an if statement.
+        if (condition) {
+            Code to execute if condition is true.
+        }
+
+    # Declare an if-else statement.
+        if (condition) {
+            Code to execute if condition is true.
+        } else {
+            Code to execute if condition is false.
+        }
+
+    # Declare a switch statement.
+        switch (expression) {
+            case value1:
+                Code to execute if expression equals value1.
+                break;
+            case value2:
+                Code to execute if expression equals value2.
+                break;
+            default:
+                Code to execute if expression doesn't match any case.
+        }
+
+    # Declare a try-catch block.
+        try {
+            Code that might throw an error.
+        } catch (error) {
+            Code to handle the error.
+        }
+
+    # Declare a timeout function.
+        setTimeout(function() {
+            Code to execute after a delay.
+        }, delay);
+
+    # Declare an interval function.
+        setInterval(function() {
+            Code to execute repeatedly at an interval.
+        }, interval);
+
+    # Declare a callback function.
+        function myFunction(callback) {
+            Code to execute before the callback.
+            callback();
+            Code to execute after the callback.
+        }
+
+    # Declare a promise.
+        let myPromise = new Promise(function(resolve, reject) {
+            Code that might resolve or reject the promise.
+        });
+
+    # Use the then method of a promise.
+        myPromise.then(function(result) {
+            Code to execute if the promise resolves successfully.
+        }).catch(function(error) {
+            Code to execute if the promise is rejected.
+        });
+
+    # Declare a class.
+        class MyClass {
+            constructor(arg1, arg2) {
+                Constructor code goes here.
+            }
+            myMethod(arg1, arg2) {
+                Method body goes here.
+            }
+        }
+
+    # Declare a module.
+        export function myFunction(arg1, arg2) {
+            Code to export goes here.
+        }
+
+    # Import a module
+        import { myFunction } from './my-module.js';

K8s_CheatSheet.md

@@ -1,3 +1,6 @@
+        #Get the documentation for pod manifests
+                kubectl explain pods
+                
         #Get total nodes in cluster
                 kubectl get nodes
                 
@@ -10,12 +13,27 @@
         #List contexts added in .kube config
                 kubectl config list-contexts
                 
+        #List the running Pods:
+                kubectl get pods
+                
         #Select the context to use
                 kubectl config use-context <context name>
 
+        #Get the password for the e2e user
+                kubectl config view -o jsonpath='{.users[?(@.name == "e2e")].user.password}'
+
         #Get all pods in all namespaces and list from most resource hungry to less
                 kubectl top pod --all-namespaces | sort --reverse --key 3 --numeric | less
                 
         #Describe specific pod in deployment that is in the selected namespace with a bit more detail
                 kubectl -n <namespace> describe deployments.apps <pod name>
                 
+        #Delete resources
+                kubectl delete
+
+        #Get a deployment's status subresource       
+                kubectl get deployment nginx-deployment --subresource=status
+
+        #List all services in the namespace       
+                kubectl get services                
+

Linux_CheatSheet.md

@@ -39,6 +39,11 @@ Linux/Unix:
 
 	#Create a new directory
 		mkdir <directory name to be created>
+
+			#Options include
+				-p if directory exists and also make parent directories as necessary
+				-v verbose
+				-m provide mode for creating directory
 
 	#Print the working directory
 		pwd
@@ -218,14 +223,28 @@ Linux/Unix:
 	#Install, build, remove and manage Debian packages
 		apt-get
 
+	#Get current user id
+		id
+
 	#Creates a new user account
 		adduser
 
 	#Creates a new group
 		groupadd 
 
-	#Adds a user to a group
+	#Modify a user to a group
 		usermod
+
+		#Options
+			-c, --comment = add comment to user
+			-g, --gid = Specify the primary group for the user account
+			-G, --groups = Specify a comma-separated list of supplementary groups for the user account
+			-a, --append = add the supplementary groups to the user's current set of group
+			-d, --home = Specify a particular home directory for the user account
+			-m, --move-home = Move the user's home directory to a new location. Must be used with the -d option
+			-s, --shell = Specify a particular login shell for the user account
+			-L, --lock = Lock the user account
+			-U, --unlock = Unlock the user account
 
 	#Remove a user from a group
 		userdel
@@ -265,9 +284,6 @@ Linux/Unix:
 		
   	#Determine system boot-up performance statistics
 	   systemd-analyze
-
-  	#Determine system boot-up performance statistics
-    		systemd-analyze
 
 	#Request system information / software version
 		uname -a
@@ -308,7 +324,7 @@ Linux/Unix:
 
 			#Query optimisation
 				-type = type of file
-				-name = matching with a filename	
+				-name = matching with a filename
 
 	#Look for a file with a giving name using query optimisation
 		find . -type f -name <filename>
@@ -375,3 +391,30 @@ Linux/Unix:
 	#Replace old text with new text
 		sed '-s/myOldText/myNewText' theFileBeingEdited.txt
 
+	#Shows you the disk usage of the current directory you are in
+		du -h
+
+	#Change hostname of the system
+		hostname <new hostname>
+
+	#Kill process
+		kill <process id>
+		kill -l #List all the kill signals
+
+		Ex: kill -9 5123 #Sends kill signal to process 5123
+
+	#Add a user on Linux server
+		useradd  username  
+
+	#List keyboard region inputs
+		localectl list-x11-keymap-layouts
+		
+	#Set keyboard input
+		localectl set-keymap <language region>
+
+	#cut command that allow you to process and filter text files
+		cut <option> <filename>
+				
+				#option include
+				-f = used for specifying a field, a set of fields, or a range of fields.
+				-d = Specify a delimiter that will be used, for ex: "," or " " or "-" or any single character delimiter. Default is "tab".

MYSQL_Cheatsheet.md

@@ -76,3 +76,17 @@ MYSQL
 
 	#Deletes multiple views.
 		DROP VIEW VIEW1,VIEW2…;
+		
+	#Truncate a table
+		TRUNCATE [TABLE] table_name;
+		
+	#Rename a table
+		RENAME TABLE table_name TO table_name;
+
+	#return the number of rows
+		SELECT COUNT(*) FROM TABLENAME
+
+	#Use of IN operator with WHERE clause
+		SELECT <field_list> FROM <table_name> WHERE <expression|column_1> IN (value1, value2, …)
+
+

NPM_CheatSheet.md

@@ -223,7 +223,13 @@ NPM / Node Package Manager
                 
         # Show npm version
                 npm --version
-                
+
+        #Install a project with a clean slate and run tests
+                npm install-ci-test
+      
+        # Display prefix
+                npm prefix
+
         # Check for outdated packages
                 npm outdated     
 
@@ -274,4 +280,5 @@ NPM / Node Package Manager
                 
         # This runs a predefined command specified in the "stop" property of a package's "scripts" object.
                 npm stop
-                
+                
+