cat
Creating the new file
Display content of the file
Concatenating more than one file
Appending data to the existing file
cp - Copy contents from a file to another file(source to destination)
mv
Renaming a file(changing name of the file)
Renaming a directory
Moves files from one directory to another directory
rm - Delete/remove a file or directory (only if directory is empty).
mkdir - create directories and subdirectories.
mkdir testdir
create multiple directories at one time:
mkdir testdir1 testdir2 testdir3
create several subdirectories at one time:
mkdir -p world/countries/states
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cd - changing/closing directory
cd .. : go back to one level
cd /testdir1/testdir2/testdir3 → changing directory
pwd : it prints present directory
cd ~ Move to users home directory from anywhere.
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rmdir - Remove the directory if it is empty (works only if directory empty)
rmdir world // error
rm -r world
rmdir testdir1 testdir2 testdir3
