https://twitter.com/IQAndreas/status/849240417837121536

hardlink-test.sh

#!/bin/bash

# $ echo "COMPRESSED" > file.gz;
# $ ln file.gz hardlink;
# $ cat file.gz 
COMPRESSED
# $ cat hardlink 
COMPRESSED

# $ echo "Let's pretend this is the temporary uncompressed file" > temp
# $ mv temp file.gz 

# $ cat file.gz 
Let's pretend this is the temporary uncompressed file
# $ cat hardlink 
COMPRESSED

# -------------------------------------------------------------------
# And yes, gzip does create a brand new inode for the second file

# $ echo "This is the uncompressed file" > file
# $ ls -1i
1704683 file
# $ gzip file 
# $ ls -1i
1704684 file.gz