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Top Forums UNIX for Dummies Questions & Answers How to create a file even root user also cant delete? Post 302891706 by Corona688 on Friday 7th of March 2014 11:16:29 AM
Old 03-07-2014
Quote:
Originally Posted by palani13dec
Is there any way to create a file in linux that root user also can't delete?
You cannot prevent root from being root.

Some filesystems like ext3 have extended options you can set for a file to make it undeletable even by root. Root can also turn this bit back off.

You cannot prevent root from being root.

If your security plan, depends on preventing root from being root, it's fatally flawed.
 

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SWITCH_ROOT(8)						       System Administration						    SWITCH_ROOT(8)

NAME
switch_root - switch to another filesystem as the root of the mount tree SYNOPSIS
switch_root [-hV] switch_root newroot init [arg...] DESCRIPTION
switch_root moves already mounted /proc, /dev, /sys and /run to newroot and makes newroot the new root filesystem and starts init process. WARNING: switch_root removes recursively all files and directories on the current root filesystem. OPTIONS
-h, --help Display help text and exit. -V, --version Display version information and exit. RETURN VALUE
switch_root returns 0 on success and 1 on failure. NOTES
switch_root will fail to function if newroot is not the root of a mount. If you want to switch root into a directory that does not meet this requirement then you can first use a bind-mounting trick to turn any directory into a mount point: mount --bind $DIR $DIR SEE ALSO
chroot(2), init(8), mkinitrd(8), mount(8) AUTHORS
Peter Jones <pjones@redhat.com> Jeremy Katz <katzj@redhat.com> Karel Zak <kzak@redhat.com> AVAILABILITY
The switch_root command is part of the util-linux package and is available from https://www.kernel.org/pub/linux/utils/util-linux/. util-linux June 2009 SWITCH_ROOT(8)
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