cd
pwd

cd .
pwd

cd ~
pwd

cd /
pwd

cd no_file
pwd

cd a b c d
pwd

cd $HOME/Documents
pwd

cd ../../../../../..
pwd

cd ..
pwd
/bin/ls

cd notworking

cd .

cd .. 
pwd
/bin/ls
cd .. 
      pwd    
/bin/ls
     cd notworking
     cd .

cd ~

cd ../Desktop

cd

cd poep

mkdir dir
cd dir
pwd

mkdir dir
cd dir
cd .
pwd

mkdir dir
cd dir
cd ./
pwd

mkdir dir
cd dir
cd ..
pwd

mkdir dir
cd dir
cd ../
pwd

touch testfile
cd testfile

cd NO_SUCH_FILE
pwd

cd hello world
pwd

cd /
pwd

cd /
cd ../../akjwyefgjkwveyjfgweyugyuwegf76t273/../../
pwd

mkdir dir
cd dir
cd ../nosuchdir/../dir
pwd

mkdir hello
cd hello world
pwd

cd /
pwd

cd /bin
pwd

cd /bin/../
pwd

mkdir dir
cd DIR
pwd

mkdir DIR
cd dir
pwd

mkdir DIR
cd DIR
pwd

mkdir dir
chmod 000 dir
cd dir
pwd
chmod 777 dir

mkdir dir
ln -s dir link
cd link
pwd

mkdir dir
ln -s dir link
rmdir dir
cd link
pwd

mkdir dir
cd dir
cd ./
pwd
cd .
pwd
cd ./././././
pwd
cd .////////./
pwd
cd ../
pwd

mkdir dir
cd dir
rmdir ../dir
cd ./
pwd
cd .
pwd
cd ./././././
pwd
cd .////////./
pwd
cd ../
pwd

mkdir -p a/b/c
cd a/b/c
rm -rf ../../b
cd ./
pwd
cd ../
pwd
cd .////./
pwd

mkdir -p a/b/c
cd a/b/c
rm -rf ../../b
cd ./
pwd
cd .././.
pwd
cd ./
pwd
cd ../
pwd

cd
pwd

export HOME=
cd
pwd

unset HOME
cd
pwd

export HOME="./"
cd
pwd

export HOME="../../"
cd
pwd

export HOME=""
cd
pwd

export HOME="/BIN"
cd
pwd

export HOME=a
mkdir -p a/b
cd
pwd

export HOME=NO_SUCH_FILE
cd
pwd

mkdir -p a/b/c/d/e/f/g/h/i/
cd a/b/c/d/../../c/d/e/f/g/h/i/../../../g/h/i/../.././././../g/h/i/../../../../../../../c/d/../d/../d/e/../../d/e/.././././e/f/.//////../f/g/h/i/////../../../
pwd

export HOME="/"
cd
cd ../../../../../././././../../../././../../../
pwd

cd /
pwd
cd /bin
pwd

cd /
pwd
cd //bin
pwd

cd //
pwd
cd //bin
pwd

cd ///
pwd
cd ///bin
pwd

cd ////
pwd
cd ////bin
pwd

cd /////
pwd
cd /////bin
pwd

cd //////
pwd
cd //////bin
pwd

cd ///////
pwd
cd ///////bin
pwd

export HOME=//
cd

export HOME=//bin/..////////////bin/../
cd

export HOME=///
cd