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pwd

print working directory

hostname

my computer's network name

mkdir

make directory

cd

change directory

ls

list directory

rmdir

remove directory

pushd

push directory

popd

pop directory

cp

copy a file or directory

mv

move a file or directory

less

page through a file

cat

print the whole file

xargs

execute arguments

find

find files

grep

find things inside files

man

read a manual page

apropos

find what man page is appropriate

env

look at your environment

echo

print some arguments

export

export/set a new environment variable

exit

exit the shell

sudo

DANGER! become super user root DANGER!

chmod

change permission modifiers

chown

change ownership

|

Takes the output from the command on the left, and "pipes" it to the command on the right.

<

Will take and send the input from the file on the RIGHT to the program on the LEFT.

>

Will take and send the input from the file on the LEFT to the program on the RIGHT.

>>

Takes the output of the command on the LEFT and appends it to the file on the RIGHT.

*

Matches anything in a wildcard like *.txt"

find

find STARTDIR -name WILDCARD -print

-i

ignore case in a command

man/help

description of command term

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