linux-commands/always_forget.txt~ at master · utkmehta/linux-commands · GitHub

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#Linux commands cheat sheet

# Files and folders
ls			#list files and folders
cat filename		#View the contents of a file on the terminal
less filename		#View the contents of the file one page at a time
mkdir foldername	#Make a new folder
touch filename		#Make a new file
cd folder/file		#Change directory
cd ..			#Go back one step
wc filename 		#Word-count
wc -l filename		#Number of lines
grep command filename	#Search for the command in the text file


#emacs
emacs filename		#Enter emacs mode
Ctrl-X + Ctrl-C		#Exit emacs

#WHAT IS MY IP
35.2.224.196		#My ip-address

#Miscallaneous keyboars shortcuts
options + command + u		 #View source code in browser
lnyx url  	    	      	 #View webpage on terminal
wget url		      	 #Dowloads webpage in the form of html files for you
curl url			 #All the html dumped to the terminal
curl url > /dev/null	     	 #View stderr. The webpage is dumped to dev/null
curl --verbose url > /dev/null	 #Details about the request response cycle


#Notes
Defualt http port: 80
Defualt https port: 443
Check if a port is open(netcap): nc -v -z url 80
Port scanning: nmap url (Use with CAUTION: Servers can blacklist)
Compute absolute path: jinja2 url_for() - Find exact command TBD

#Manual request-response cycle
telnet url #port
GET /index.html HTTP/1.0

# Command line fun
cowthink                               # ascii art of a fow w/ thought bubble
cowsay STRING                          # ascii art of a cow w/ speech bubble
cowsay -f tux                          # ^^^ penguin
cowsay -l                              # list characters
fortune                                # print a random adage
fortune | cowsay                       # ascii art + random adage
sl                                     # steam locomotive
asciiquarium                           # ascii art animated aquarium
telnet towel.blinkenlights.nl          # ascii animated Start Wars C-] to quit
rig                                    # generate random fake identities
rev <<< "go hang a salami im a lasagna hog" # palindrome
figlet STRING                          # print ascii bubble text
lolcat                                 # rainbow colors (gem install lolcat)
curl http://wttr.in/ann_arbor          # ascii weather report
curl wttr.in/:help                     # ascii weather report help
curl wttr.in?0                         # ascii weather report, only current
curl wttr.in?n                         # ascii weather report, narrow width