cannot modify file with root in linux

Subject:

There are some files that cannot be modified if the extended attributes is immute If Linux permissions were not complicated enough, I just learned about extended attributes.Turns out there is this thing called an immutable attribute. Using lsattr php5.fcgi shows the i(mmutable) attribute is set. Using chattr -i php5.fcgi allowed me to save modifications then chattr +i php5.fcgi to restore the immutable attribute.ref:  https://askubuntu.com/questions/571089/cannot-edit-php5-fcgi-owned-by-me-with-rwx-owner-permissions/571109#571109

2017-07-07 09:47:26gstlouis