command ln difference between soft link and hard link

info

1. ln creates links between files

2. ln option target linkname

   • ln creates a link to file target

   • with the name linkname

   • ln creates hard links by default

   • -s or --symbolic for symbolic links

demo

1. create file and link

        # create a file `a`
        $ echo "hello" > a
   
        # create `hard link`
        # called `b` to `a`
        $ ln a b
   
        # create `soft link`
        # called `c` to `a`
        $ ln -s a c
   

2. printing the contents

        $ cat a
        hello
   
        $ cat b
        hello
   
        $ cat c
        hello
   

3. remove file a

        $ rm a
   

4. printing the contents again

        $ cat a
        cat: a: No such file or directory
           
        $ cat b
        a
           
        $ cat c
        cat: c: No such file or directory