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Equations

(MathJax-LaTeX plugin)

\(E=mc^2\)

\(\sum_{i=0}^n i^2 = \frac{(n^2+n)(2n+1)}{6}\)

\(x = {-b \pm \sqrt{b^2-4ac} \over 2a}\)

Keywords

free-fall
satellite
scalar
vector
resultant
force
friction

❤️

Love
Love
Love
Love

Dies irae, dies illa
Solvet saeclum in favilla
Teste David cum Sybilla

Unix

ls — list items in current directory

ls -l — list items in current directory and show in long format to see perimissions, size, and modification date

ls -a — list all items in current directory, including hidden files

ls -F — list all items in current directory and show directories with a slash and executables with a star

ls dir — list all items in directory dir

cd dir — change directory to dir

cd .. — go up one directory

cd / — go to the root directory