added first cheatsheets

Cheatsheets/bits&Bytes.md

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+---
+title: bits and Bytes
+description: 
+published: true
+date: 2023-04-28T02:38:18.678Z
+tags: 
+editor: markdown
+dateCreated: 2023-04-28T02:22:37.379Z
+---
+
+# bits and Bytes
+
+b = bit = Binary, 0 or 1
+B = Byte = 8 Bits enough to represent 256 different characters
+
+K = 1.000
+M = 1.000.000
+G = 1.000.000.000
+T = 1.000.000.000.000
+P = 1.000.000.000.000.000
+
+Kb = Kilobit = 1000 b
+Mb = Megabit = 1000 Kb
+Gb = Gigabit = 1000 Mb
+Tb = Terabit = 1000 Gb
+Pb = Petabit = 1000 Tb
+
+Kib = Kibibit = 1024 b
+Mib = Mebibit = 1024 Kb
+Gib = Gibibit = 1024 Mb
+Tib = Tebibit = 1024 Gb
+Pib = Pebibit = 1024 Tb
+
+KB = KiloByte = 1000 B
+MB = MegaByte = 1000 KB
+GB = GigaByte = 1000 MB
+TB = TeraByte = 1000 GB
+PB = PetaByte = 1000 TB
+
+KiB = KibiByte = 1024 B
+MiB = MebiByte = 1024 KB
+GiB = GibiByte = 1024 MB
+TiB = TebiByte = 1024 GB
+PiB = PebiByte = 1024 TB

Cheatsheets/makefile.md

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+---
+title: makefile
+description: 
+published: true
+date: 2023-04-28T02:38:18.678Z
+tags: 
+editor: markdown
+dateCreated: 2023-04-28T02:22:37.379Z
+---
+
+# Makefile
+
+```
+VARIABLE	=	VALUE
+
+RULE: Dependency $(FUNCTION)
+	$(FUNCTION)
+	Task
+
+
+
+
+VAR		= value						#normale value assignment
+VAR		:= $(VAR).o					#value assignment with expansion
+VAR		!= uname					#add output of command
+VAR		:= $(sh uname)				#alternative way to add output
+VAR		+= -Wall -Werror -Wextra	#Append to value
+VAR		?= $(VAR)					#only sets if not defined
+
+Text functions
+$(SRC:.c=.o)						#Changes all suffixes from .c to .o
+
+Filename functions
+$(addprefix obj/,$(OBJ))			#Adds a directory to the filenames
+
+conditional functions
+if
+ifeq
+ifdef
+else
+or
+and
+endif
+foreach
+
+value function
+$(value (VAR))						#print value without expanding
+
+shell function
+$(shell COMMAND)					#insert output here
+
+control functions
+$(error Something went wrong)		#Makefile will stop here
+$(warning This is a warning)		#Display a warning
+$(info This is some info)			#Display some info
+
+$@		#is the rule name
+$<		#is the first dependancy
+$^		#are all dependancies
+$?		#only dependencies that have changed
+$|		#If anything changed, rebuild everything
+%		#acts as a wildcard in the rule
+
+
+.PHONY: all clean fclean re bonus	#Doesn't create a file named after the target
+```

Cheatsheets/mariadb.md

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+---
+title: mariadb
+description: 
+published: true
+date: 2023-04-28T02:38:18.678Z
+tags: 
+editor: markdown
+dateCreated: 2023-04-28T02:22:37.379Z
+---
+
+# MariaDB
+
+create database DATABASE;
+
+create user USER@localhost identified by 'PASSWORD';
+grant all privileges on DATABASE.* to USER@localhost;
+
+drop user USER@localhost;
+drop database DATABASE;
+
+show databases;
+use mysql; select user from user;
+
+mariadb -u USER -p DATABASE < backup.sql
+mariadb_dump -u USER -p DATABASE > backup.sql
+
+flush privileges;