chmod issue

[pharford57]

hi out there
we have a customer that ran a sudo chmod +x -R * command on his / filesystem by mistake and now the machine cannot be accessed on the network

Has anyone any idea what chmod command to run to restore the system to its original state ?

thanks
P

[Irithori]

This cannot be easily reverted.

Once you gain access to the box either locally or via remote management,
your options are:

a) Make a list of all files and permissions of a comparable system (same distribution, same version, etc)
and apply those on the borked machine
b) look at the changes via a previously installed file integrity scanner like aide, apply like in a)
c) restore the system directorys from backup
d) maybe rpm still works.

rpm -Va

This command will list all modified packages/files.
Reinstall these packages via rpm (or yum, if it still works)
e) reinstall

Personally, I would go for e), as my machines are fully automated, config controlled and redundant.
If that is not the case, try d)

Edit:
Seems a little more is needed to get to the list of packages:

rpm -Va --nodeps --noscripts --nodigest --nosignature --nolinkto --nomd5 --nosize --nouser --nogroup --nomtime --nordev | sed -n 's/.*M.* \(.*\)/\1/p' |xargs rpm -qf --queryformat "%{NAME}\n" | sort | uniq