what is a file ? Post: 302708273

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Top Forums UNIX for Dummies Questions & Answers what is a file ? Post 302708273 by Arun_Linux on Monday 1st of October 2012 10:32:48 AM

10-01-2012

Registered User

what is a file ?

I have few basic doubts about files

1) Windows recognizes file by its extension like (.txt , .csv). How does unix/linux do it ?

2) How does file editor capable of editing various file formats ? Whats the logic behind it ?

3) Does all files have metadata ?

4) If they contain a meta data how to read it (tel me some simple python script)?

5) Are the properties like timestamp, permission, size are stored in the file itself?

6) Is it possible to create my own file and a file editor, such that no other file editor (e.g vi) could read it ?
If yes pls let me know the tutorial link.

Arun_Linux

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vitmp

VITMP(1)						      General Commands Manual							  VITMP(1)

NAME

       vitmp - edit temporary files

SYNOPSIS

       vitmp [VIM options] FILE...

DESCRIPTION

       vitmp is a wrapper around the VIM editor which may be used to invoke the editor in a way that is guaranteed to be suitable for editing tem-
       porary files used with programs such as crontab(1) and edquota(8).  The instance of the editor that is invoked is /bin/vi.

       In particular, it is guaranteed that the file, if edited, will be overwritten in place such that the modified contents may be read back via
       a previously obtained file descriptor.  Invoking the editor via vitmp also makes sure that no additional editor temporary files are used.

       Please note that vitmp offers no crash recovery capabilities.  If the editor crashes during the overwrite, data may be lost.

HISTORY

       vitmp first appeared in Openwall GNU/*/Linux 1.0.

AUTHORS

       Solar Designer <solar@owl.openwall.com>

SEE ALSO

       crontab(1), vi(1), vim(1), edquota(8)

Openwall Project						   25 April 2002							  VITMP(1)