Mfcttrf

Swapping rooks in a 4x4 board

Architecture of networked game engine

Generic function to loop over inputs and execute a command in bash?

Are neural networks the wrong tool to solve this 2D platformer/shooter game? Is there a proven way to frame this problem to a neural network?

Short story with brother-sister conjoined twins as protagonists?

Why aren't (poly-)cotton tents more popular?

How can I convince my reader that I will not use a certain trope?

Impossible darts scores

Does the UK have a written constitution?

Is it okay to visually align the elements in a logo?

Why isn’t the tax system continuous rather than bracketed?

Can a US President have someone sent to prison?

First-year PhD giving a talk among well-established researchers in the field

Should I tell my insurance company I'm making payments on my new car?

When is it ok to add filler to a story?

C-152 carb heat on before landing in hot weather?

The impact of an intelligent and (mostly) hostile flying race on weapons and armor

Why do some games show lights shine through walls?

Do French speakers not use the subjunctive informally?

MH370 blackbox - is it still possible to retrieve data from it?

How can I repair scratches on a painted French door?

What is this opening trap called, and how should I play afterwards? How can I refute the gambit, and play if I accept it?

What is this particular type of chord progression, common in classical music, called?

Intuitively, why does putting capacitors in series decrease the equivalent capacitance?

Symbolic equivalent of chmod 400

problem with chmod commandautomatically set sudo chmod 777Understanding chmod Symbolic Notation and use of OctalWhat is the Ubuntu equivalent of OSX `chmod -h` flag?Incorrectly ran chmod 754Chmod -r issuesAfter doing chmod 400 on /usr the sudo command is not workingConfusion in chmod optionschmod 400 will not change the permissions of a fileCannot change file permission after chmod 400

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

2

The following is often used to set file permissions, a good example being setting a key file to an appropriate permission level to be used by ssh (this being the "octal" form):

chmod 400 filename.xyz

Would it be a correct equivalent and acceptable practice to use the following instead (this is the "symbolic" form)?

chmod a=,u=r filename.xyz

The reason I ask is that it seems a bit clearer for code readability. Still not exactly human readable, but no bit mapping needed.

If maximum readibility (and not terseness) were the primary driver, would there be a better option?

permissions chmod

share|improve this question

asked 8 hours ago

GaTechThomasGaTechThomas

11122 bronze badges

add a comment | 

2

The following is often used to set file permissions, a good example being setting a key file to an appropriate permission level to be used by ssh (this being the "octal" form):

chmod 400 filename.xyz

Would it be a correct equivalent and acceptable practice to use the following instead (this is the "symbolic" form)?

chmod a=,u=r filename.xyz

The reason I ask is that it seems a bit clearer for code readability. Still not exactly human readable, but no bit mapping needed.

If maximum readibility (and not terseness) were the primary driver, would there be a better option?

permissions chmod

share|improve this question

asked 8 hours ago

GaTechThomasGaTechThomas

11122 bronze badges

add a comment | 

The following is often used to set file permissions, a good example being setting a key file to an appropriate permission level to be used by ssh (this being the "octal" form):

chmod 400 filename.xyz

Would it be a correct equivalent and acceptable practice to use the following instead (this is the "symbolic" form)?

chmod a=,u=r filename.xyz

The reason I ask is that it seems a bit clearer for code readability. Still not exactly human readable, but no bit mapping needed.

If maximum readibility (and not terseness) were the primary driver, would there be a better option?

permissions chmod

share|improve this question

asked 8 hours ago

GaTechThomasGaTechThomas

11122 bronze badges

chmod 400 filename.xyz

chmod a=,u=r filename.xyz

share|improve this question

asked 8 hours ago

GaTechThomasGaTechThomas

11122 bronze badges

share|improve this question

asked 8 hours ago

GaTechThomasGaTechThomas

11122 bronze badges

asked 8 hours ago

GaTechThomasGaTechThomas

11122 bronze badges

asked 8 hours ago

GaTechThomasGaTechThomas

11122 bronze badges

1 Answer
1

active

oldest

votes

4

With a=,u=r, the order is important. If you accidentally swap the order of a= and u=r (or the order of a= and u=), the result would be very different. (Yes, a and u are pretty far from each other on a QWERTY keyboard, but someone looking at a reference doc and manually typing things in might mess up between the two very similar looking parts.) For maximum readability and safety, I'd be more explicit:

chmod u=r,go-rwx filename # or go-rwxst

The permission components are very different here, and way more explicit, making mistakes less likely to happen. And it doesn't matter if you have go-rwx first or u=r first.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

chmod a-rwxchmod a-rwx

4122 bronze badges

New contributor

chmod a-rwx is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That makes a lot of sense.
  
  – GaTechThomas
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you mean "u=r" at the very end of the answer?
  
  – GaTechThomas
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @GaTechThomas I did, thanks! Fixed the typo.
  
  – chmod a-rwx
  8 hours ago
  

  
  
  
  

add a comment | 

Your Answer

StackExchange.ready(function()
var channelOptions =
tags: "".split(" "),
id: "89"
;
initTagRenderer("".split(" "), "".split(" "), channelOptions);

StackExchange.using("externalEditor", function()
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled)
StackExchange.using("snippets", function()
createEditor();
);

else
createEditor();

);

function createEditor()
StackExchange.prepareEditor(
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader:
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
,
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
);



);

draft saved

draft discarded

Sign up or log in

StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);

Sign up using Google

Sign up using Facebook

Sign up using Email and Password

Post as a guest

Name

Email

Required, but never shown

StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f1153204%2fsymbolic-equivalent-of-chmod-400%23new-answer', 'question_page');

);

Post as a guest

Name

Email

Required, but never shown

4

With a=,u=r, the order is important. If you accidentally swap the order of a= and u=r (or the order of a= and u=), the result would be very different. (Yes, a and u are pretty far from each other on a QWERTY keyboard, but someone looking at a reference doc and manually typing things in might mess up between the two very similar looking parts.) For maximum readability and safety, I'd be more explicit:

chmod u=r,go-rwx filename # or go-rwxst

The permission components are very different here, and way more explicit, making mistakes less likely to happen. And it doesn't matter if you have go-rwx first or u=r first.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

chmod a-rwxchmod a-rwx

4122 bronze badges

New contributor

chmod a-rwx is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That makes a lot of sense.
  
  – GaTechThomas
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you mean "u=r" at the very end of the answer?
  
  – GaTechThomas
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @GaTechThomas I did, thanks! Fixed the typo.
  
  – chmod a-rwx
  8 hours ago
  

  
  
  
  

add a comment | 

4

With a=,u=r, the order is important. If you accidentally swap the order of a= and u=r (or the order of a= and u=), the result would be very different. (Yes, a and u are pretty far from each other on a QWERTY keyboard, but someone looking at a reference doc and manually typing things in might mess up between the two very similar looking parts.) For maximum readability and safety, I'd be more explicit:

chmod u=r,go-rwx filename # or go-rwxst

The permission components are very different here, and way more explicit, making mistakes less likely to happen. And it doesn't matter if you have go-rwx first or u=r first.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

chmod a-rwxchmod a-rwx

4122 bronze badges

New contributor

chmod a-rwx is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  That makes a lot of sense.
  
  – GaTechThomas
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Did you mean "u=r" at the very end of the answer?
  
  – GaTechThomas
  8 hours ago
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  @GaTechThomas I did, thanks! Fixed the typo.
  
  – chmod a-rwx
  8 hours ago
  

  
  
  
  

add a comment | 

With a=,u=r, the order is important. If you accidentally swap the order of a= and u=r (or the order of a= and u=), the result would be very different. (Yes, a and u are pretty far from each other on a QWERTY keyboard, but someone looking at a reference doc and manually typing things in might mess up between the two very similar looking parts.) For maximum readability and safety, I'd be more explicit:

chmod u=r,go-rwx filename # or go-rwxst

The permission components are very different here, and way more explicit, making mistakes less likely to happen. And it doesn't matter if you have go-rwx first or u=r first.

share|improve this answer

edited 6 hours ago

answered 8 hours ago

chmod a-rwxchmod a-rwx

4122 bronze badges

New contributor

chmod a-rwx is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

chmod u=r,go-rwx filename # or go-rwxst

share|improve this answer

edited 6 hours ago

answered 8 hours ago

chmod a-rwxchmod a-rwx

4122 bronze badges

New contributor

chmod a-rwx is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered 8 hours ago

chmod a-rwxchmod a-rwx

4122 bronze badges

New contributor

chmod a-rwx is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

answered 8 hours ago

chmod a-rwxchmod a-rwx

4122 bronze badges