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====== Operation not permitted Cannot delete file ======

If an illegal file or similar is placed, there may be cases where the placed file cannot be deleted. 
This is something that manipulates file attributes other than permissions in Linux's ext2 and ext3 file systems.


===== Cannot be deleted normally =====

<code console>
# rm -rf ttyload
rm: cannot remove `ttyload': Operation not permitted
</code>

===== confirm lsattr =====

<code console>
# lsattr ttyload 
s---ia------- ttyload
</code>

===== The file can be deleted if its attributes are modified. =====
<code console>
# chattr -ia ttyload
# lsattr ttyload 
s------------ ttyload
</code>


==== If you want to prevent the file from being deleted, you can add attributes to it. ====

<code>
# chattr +ia ttyload
# lsattr ttyload 
s---ia------- ttyload
</code>


===== complete to remove =====
<code console>
# rm -rf ttyload
</code>

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