Create Linux CheatSheet.md

Linux CheatSheet.md

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+Linux/Unix:
+
+	#List files and Directories.
+		ls
+			#Options include.
+				-l = List
+				-h = Human readable file/directory size
+				-a = Show hidden files/directories
+
+	#Change Directory
+	    cd <pathname>
+	    
+	#Print ASCII character strings in large letters
+		banner <text>
+
+	#List running processes
+		ps
+
+	#Create a new directory
+		mkdir <directory name to be created>
+
+	#Print the working directory
+		pwd
+		
+	#Recursively search for a file or directory
+		find <file or directory name>
+
+	#View full contents of file in terminal
+		cat <filename>
+		
+	#Copy a file
+		cp <original filename> <copy filename>
+		
+	#Move or rename a file
+		mv <original file> <new location or name>
+
+	#Run previous command as sudo.
+		sudo !!
+
+	#Display history file in terminal
+		history
+
+	#Run command with history ID <id>
+		!<id>
+
+	#Run last command via command name
+		!<command name>
+
+	#Search man pages with given keyword
+		apropos <keyword>
+
+	#Use stdout as an argument
+		xargs
+
+	#Show information of file
+		file <filename>
+
+	#Reverse search of history
+		ctrl + r <command>
+			Tip: Press ctrl + r to cycle to the next command etc
+
+	#Show current user
+		whoami
+
+	#Show logged in user with  what process they are running etc
+		w
+
+	#Show logged in user
+		who
+
+	#Pause current session
+		ctrl + z
+
+	#Show current paused sessions
+		jobs
+
+	#Resume paused session
+		fg
+
+	#Send paused session to background
+		bg
+		
+	#Show network interface information
+		ifconfig
+		
+	#Show drive usage information
+		df
+		
+	#Show memory usage information
+		free
+		
+	#Ping a given IP or domain
+		ping <ip or domain>
+		
+	#Open an SSH session with a given user and machine
+		ssh <user>@<machine IP or domain>
+		
+	#Close an active SSH session or exit the terminal
+		exit
+		
+	#Show logs of specified service
+		journalctl -u <service name>
+
+	#Show logs of specified process ID
+		journalctl _PID=<process id>
+		
+	#Show all installed services
+		systemctl list-unit-files --type=service
+
+	#Terminate process 
+		kill <process id>
+
+	#Create a file
+		touch <filename>
+
+	#Print the first 10 lines of a file to standard output
+		head <filename>
+			#Options include
+				-n [NUM] = Print the first NUM lines instead of 10
+				-n -[NUM] = Print all but the last NUM lines of a file
+        
+	#Print the last 10 lines of a file to standard output
+		tail <filename>
+
+			#Options include
+				-n [NUM] = Print the last [NUM] lines instead of 10
+				-n +[NUM] = Print all lines starting with [NUM] until EOF
+				
+	#Check the current system clock time
+		timedatectl
+	        	#Options include
+				set-time "yyyy-MM-dd hh:mm:ss" = Set the local time of the system clock directly
+	  		        list-timezones = available timezones
+				set-timezone timezone = Set the system timezone
+				set-ntp on = Enable Network Time Protocol (NTP) synchronization
+       
+	#View Date on terminal 
+		date
+
+	#Change the permissions granted
+		chmod
+
+	#change a file's ownership
+		chown
+
+	#change the apparent root directory for the current running process and its children
+		chroot
+
+	#Edit file using vi
+		vi <file name>
+
+	#Edit file using nano
+		nano <file name>
+
+	#Displays active TCP connections, ports
+		netstat -tulpn
+
+	#Download from terminal
+		wget <url>
+
+	#unzip a file
+		unzip <filename>
+
+	#mount a drive
+		mount <drive name> <mount point>
+
+	#unmount a drive
+		umount <drive name>
+
+	#Switch to users
+		su <username>
+
+	#Switch to root
+		sudo su
+
+	#Find the location of source/binary file
+		whereis <file name>
+
+	#Manipulation of partition tables
+		fdisk 
+
+	#Install, build, remove and manage Debian packages
+		dpkg
+
+	#Install, build, remove and manage Debian packages
+		apt-get
+
+	#Creates a new user account
+		adduser
+
+	#Creates a new group
+		groupadd 
+
+	#Adds a user to a group
+		usermod
+
+	#Remove a user from a group
+		userdel
+
+	#Change password of user
+		passwd
+
+	#Check md5sum of file
+		md5sum <filename>
+
+	#Check sha1sum of file
+		sha1sum <filename>
+
+	#Prints the name of the terminal
+		tty
+
+	#Ftp on a remote host
+		ftp <host>
+
+	#Dns lookup 
+		nslookup <host>
+
+	#Show domain information
+		host <host>
+
+	#Show detailed domain information
+		dig <host>
+
+	#View sttrings in a file
+		strings <filename>
+
+	#View file type
+		file <filename>
+
+	#Details on all Active Processes
+		top
+		
+  	#Determine system boot-up performance statistics
+	   systemd-analyze
+
+  	#find the files by name
+		locate <filename>