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stop force save on a file with read only permission

.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
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1

So I have a script file that is currently in sudoers, and for security I want this file to be read only... so I issued the following chmod:

chmod 555 test.sh

Now the permissions on this file is

-r-xr-xr-x  

However, when I go to vi this file, even though it says " W10: Warning: Changing a readonly file", I can still do "w!" to force save it. How can I also disable force saving so that a regular user wont be able to write to this file at all?

Thanks

linux permissions sudo chmod

share|improve this question

asked 3 hours ago

user3128077user3128077

62

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Force saving effectively deletes and recreates the file. The user needs write permissions on the parent directory to force save.
  
  – jordanm
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So I have a script file that is currently in sudoers What exactly do you mean by that? If you just want users to be able to read the file, I can't see why you'd need sudo for that. And if you don't want users to be able to modify the file, you likely don't want to enable sudo editing of the file.
  
  – Andrew Henle
  3 hours ago
  

  
  
  
  

add a comment | 

1

So I have a script file that is currently in sudoers, and for security I want this file to be read only... so I issued the following chmod:

chmod 555 test.sh

Now the permissions on this file is

-r-xr-xr-x  

However, when I go to vi this file, even though it says " W10: Warning: Changing a readonly file", I can still do "w!" to force save it. How can I also disable force saving so that a regular user wont be able to write to this file at all?

Thanks

linux permissions sudo chmod

share|improve this question

asked 3 hours ago

user3128077user3128077

62

• 
  
  
  

  
  1
  

  
  
  
  
  
  

  
  
  Force saving effectively deletes and recreates the file. The user needs write permissions on the parent directory to force save.
  
  – jordanm
  3 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  So I have a script file that is currently in sudoers What exactly do you mean by that? If you just want users to be able to read the file, I can't see why you'd need sudo for that. And if you don't want users to be able to modify the file, you likely don't want to enable sudo editing of the file.
  
  – Andrew Henle
  3 hours ago
  

  
  
  
  

add a comment | 

So I have a script file that is currently in sudoers, and for security I want this file to be read only... so I issued the following chmod:

chmod 555 test.sh

Now the permissions on this file is

-r-xr-xr-x  

However, when I go to vi this file, even though it says " W10: Warning: Changing a readonly file", I can still do "w!" to force save it. How can I also disable force saving so that a regular user wont be able to write to this file at all?

Thanks

linux permissions sudo chmod

share|improve this question

asked 3 hours ago

user3128077user3128077

62

chmod 555 test.sh

-r-xr-xr-x  

share|improve this question

asked 3 hours ago

user3128077user3128077

62

share|improve this question

asked 3 hours ago

user3128077user3128077

62

asked 3 hours ago

user3128077user3128077

62

asked 3 hours ago

user3128077user3128077

62

1 Answer
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0

Set the immutable file attribute with chattr.

sudo chattr +i file

A file with the 'i' attribute cannot be modified: it cannot be deleted or renamed, no link can be created to this file, most of the file's metadata can not be modified, and the file can not be opened in write mode. Only the superuser or a process possessing the
CAP_LINUX_IMMUTABLE capability can set or clear this attribute.

The downside of doing this is that you won't be able to write to the file even as the superuser (root). You will need to remove the immutable attribute first:

sudo chattr -i file

share|improve this answer

answered 1 hour ago

JRFergusonJRFerguson

10.4k32632

add a comment | 

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0

Set the immutable file attribute with chattr.

sudo chattr +i file

A file with the 'i' attribute cannot be modified: it cannot be deleted or renamed, no link can be created to this file, most of the file's metadata can not be modified, and the file can not be opened in write mode. Only the superuser or a process possessing the
CAP_LINUX_IMMUTABLE capability can set or clear this attribute.

The downside of doing this is that you won't be able to write to the file even as the superuser (root). You will need to remove the immutable attribute first:

sudo chattr -i file

share|improve this answer

answered 1 hour ago

JRFergusonJRFerguson

10.4k32632

add a comment | 

0

Set the immutable file attribute with chattr.

sudo chattr +i file

A file with the 'i' attribute cannot be modified: it cannot be deleted or renamed, no link can be created to this file, most of the file's metadata can not be modified, and the file can not be opened in write mode. Only the superuser or a process possessing the
CAP_LINUX_IMMUTABLE capability can set or clear this attribute.

The downside of doing this is that you won't be able to write to the file even as the superuser (root). You will need to remove the immutable attribute first:

sudo chattr -i file

share|improve this answer

answered 1 hour ago

JRFergusonJRFerguson

10.4k32632

add a comment | 

Set the immutable file attribute with chattr.

sudo chattr +i file

A file with the 'i' attribute cannot be modified: it cannot be deleted or renamed, no link can be created to this file, most of the file's metadata can not be modified, and the file can not be opened in write mode. Only the superuser or a process possessing the
CAP_LINUX_IMMUTABLE capability can set or clear this attribute.

The downside of doing this is that you won't be able to write to the file even as the superuser (root). You will need to remove the immutable attribute first:

sudo chattr -i file

share|improve this answer

answered 1 hour ago

JRFergusonJRFerguson

10.4k32632

sudo chattr +i file

sudo chattr -i file

share|improve this answer

answered 1 hour ago

JRFergusonJRFerguson

10.4k32632

answered 1 hour ago

JRFergusonJRFerguson

10.4k32632

answered 1 hour ago

JRFergusonJRFerguson

10.4k32632