4.1 All Files Are Case Sensitive

Files on Linux (or any Unix) are case sensitive. This means that FILE1 is different from file1, and /etc/hosts is different from /etc/Hosts (the latter one does not exist on a typical Linux computer). ^[feedback]

This screenshot shows the difference between two files, one with upper case W, the other with lower case w. ^[feedback]

paul@laika:~/Linux$ ls
winter.txt  Winter.txt
paul@laika:~/Linux$ ls -lh winter.txt
-rw-r--r-- 1 paul paul 0 Oct 15 08:57 winter.txt
paul@laika:~/Linux$ ls -lh Winter.txt
-rw-r--r-- 1 paul paul 0 Oct 15 08:56 Winter.txt