To know current directory we are in

# Print working directory
pwd

To list files

# Syntax
ls [OPTIONS] [FILE]

# “long” output
ls -l file.txt

# To get a list of hidden files and direcotires
ls -a

# To get a listing of all files, including hidden files and directories
ls -la file.txt

To change directory

# Syntax
cd [directory_path]

# Changing a directory by giving an absolute path
cd /usr/share

# changing a directory by giving an absolute path
# Any directory within the current directory can be referenced by name without a leading slash
cd share

# To go back up, travelling to the parent of the current directory
cd ..