Unix shell

http://smarchal.com/unix-cheat-sheet/

ls PATH #list files in PATH

man grep        # manual of grep function

ln  # link, similar to copy but does not create two files

pwd  #tells you where you are

make #executes the makefile

cat #look inside files

rm #remove forever

ls untitled/  #list untitled folder without go there

.  # present directory can be used to tell the program to store something in that directory

wc  #word count

sort #sort -n numerically

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