There are no actual "hidden" files in Unix. The only way to hide the existence of a file is to place it in a folder that no one has read permissions for.
A hidden file is one that starts with a period (.). These are usually files that always exist, but most users don't want to see them in a file listing. Any file can be hidden from the normal file listing by naming it with a leading period symbol.
A hidden file in Unix is any file that starts with a '.' in the name. Any utility that creates files can create a hidden file. Note: it is important to know that a hidden file is usually one that doesn't need to be shown in a directory listing all the time so unless you use the special option to show them they won't show up in a listing. Other than that, they have no special attributes.
You use the 'chown' command. You must be the owner of the file to do this or the super-user to change ownership.
The 'CD' command is not standard for Unix. The 'cd' command, however, will change directories (folders). It is a means of navigating the Unix file system.
+h The above answer is incomplete and incorrect; "normally hidden" files in Unix merely start with the '.' character and are not normally shown by the ls command. Use the 'mv' to rename it if it doesn't start with a period.
"Hidden" is a file attribute; this is information about the file that shouldn't change when you reinstall the operating system.
A hidden file is any file or directory that starts with the character '.' (period). It is designed to eliminate common files from showing with the 'ls' command. Using the -a option for 'ls' will show all files.
The Unix file contains which kinds of fields?
From the Properties window, you can change the read-only, hidden, archive, and indexing atributes of the file.
There is no the system file. There are many files necessary to create a working Unix system.
Use the 'chmod' command to change permissions on any file. Note: you have to be the owner (or the superuser) to do this.
The host file in Unix is usually located in the /etc directory.