How can a new user be given write/chmod permissions to a single file and write/chmod permissions for that...












0















I have a friend (with root access) that wants to prevent himself from having write access to /etc/hosts. I'm wondering if he can create a new user, give me the passcode for that new user, grant that new user write permissions for the file and then remove write permissions and chmod permissions for that file from root. Is something like this or something similar in effect possible?










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  • If it's a case of blocking access to web/internet hosts via /etc/hosts another possibility is to use something like OpenDNS - which you can set at the router. There are relatively easy workarounds, but that's true for /etc/hosts entries too.

    – pbhj
    Jan 3 at 16:49
















0















I have a friend (with root access) that wants to prevent himself from having write access to /etc/hosts. I'm wondering if he can create a new user, give me the passcode for that new user, grant that new user write permissions for the file and then remove write permissions and chmod permissions for that file from root. Is something like this or something similar in effect possible?










share|improve this question























  • If it's a case of blocking access to web/internet hosts via /etc/hosts another possibility is to use something like OpenDNS - which you can set at the router. There are relatively easy workarounds, but that's true for /etc/hosts entries too.

    – pbhj
    Jan 3 at 16:49














0












0








0








I have a friend (with root access) that wants to prevent himself from having write access to /etc/hosts. I'm wondering if he can create a new user, give me the passcode for that new user, grant that new user write permissions for the file and then remove write permissions and chmod permissions for that file from root. Is something like this or something similar in effect possible?










share|improve this question














I have a friend (with root access) that wants to prevent himself from having write access to /etc/hosts. I'm wondering if he can create a new user, give me the passcode for that new user, grant that new user write permissions for the file and then remove write permissions and chmod permissions for that file from root. Is something like this or something similar in effect possible?







root chmod






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asked Jan 3 at 15:55









BlandCorporationBlandCorporation

283414




283414













  • If it's a case of blocking access to web/internet hosts via /etc/hosts another possibility is to use something like OpenDNS - which you can set at the router. There are relatively easy workarounds, but that's true for /etc/hosts entries too.

    – pbhj
    Jan 3 at 16:49



















  • If it's a case of blocking access to web/internet hosts via /etc/hosts another possibility is to use something like OpenDNS - which you can set at the router. There are relatively easy workarounds, but that's true for /etc/hosts entries too.

    – pbhj
    Jan 3 at 16:49

















If it's a case of blocking access to web/internet hosts via /etc/hosts another possibility is to use something like OpenDNS - which you can set at the router. There are relatively easy workarounds, but that's true for /etc/hosts entries too.

– pbhj
Jan 3 at 16:49





If it's a case of blocking access to web/internet hosts via /etc/hosts another possibility is to use something like OpenDNS - which you can set at the router. There are relatively easy workarounds, but that's true for /etc/hosts entries too.

– pbhj
Jan 3 at 16:49










1 Answer
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Nope, the root user can not possibly be restricted. If you have root access, you can do everything and also revert all kinds of protections one could think of.



Besides, you should normally not directly use the root account anyway but log in as regular user and use sudo to run single commands with elevated permissions. This also helps preventing some accidental changes, compared to always operating in a root shell.



To further protect against accidental modification, you could make the file immutable using



sudo chattr +i /etc/hosts


to prevent modifications by everybody, including root and system processes (which might be something that could cause trouble depending on the file and what you're doing with it). But still, root can lift that protection again.



To sum it up, with great powers (root login or sudo access) comes great responsibility. If your friend thinks they must be prevented from altering system files like that, they should not have administrative access to the machine.






share|improve this answer
























  • Perhaps I've misread the situation but it's worth noting that modifications will be recorded, that the system can be set to log sudo commands; you could have off-site journals to get around local modification of log files, but it starts getting super convoluted IMO. (Maybe point a private webcam at the computer.)

    – pbhj
    Jan 3 at 16:54











  • An excellent, concise answer that covers all the bases. This is the right way to look at the problem.

    – user535733
    Jan 3 at 17:02













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1 Answer
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active

oldest

votes








1 Answer
1






active

oldest

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active

oldest

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active

oldest

votes









1














Nope, the root user can not possibly be restricted. If you have root access, you can do everything and also revert all kinds of protections one could think of.



Besides, you should normally not directly use the root account anyway but log in as regular user and use sudo to run single commands with elevated permissions. This also helps preventing some accidental changes, compared to always operating in a root shell.



To further protect against accidental modification, you could make the file immutable using



sudo chattr +i /etc/hosts


to prevent modifications by everybody, including root and system processes (which might be something that could cause trouble depending on the file and what you're doing with it). But still, root can lift that protection again.



To sum it up, with great powers (root login or sudo access) comes great responsibility. If your friend thinks they must be prevented from altering system files like that, they should not have administrative access to the machine.






share|improve this answer
























  • Perhaps I've misread the situation but it's worth noting that modifications will be recorded, that the system can be set to log sudo commands; you could have off-site journals to get around local modification of log files, but it starts getting super convoluted IMO. (Maybe point a private webcam at the computer.)

    – pbhj
    Jan 3 at 16:54











  • An excellent, concise answer that covers all the bases. This is the right way to look at the problem.

    – user535733
    Jan 3 at 17:02


















1














Nope, the root user can not possibly be restricted. If you have root access, you can do everything and also revert all kinds of protections one could think of.



Besides, you should normally not directly use the root account anyway but log in as regular user and use sudo to run single commands with elevated permissions. This also helps preventing some accidental changes, compared to always operating in a root shell.



To further protect against accidental modification, you could make the file immutable using



sudo chattr +i /etc/hosts


to prevent modifications by everybody, including root and system processes (which might be something that could cause trouble depending on the file and what you're doing with it). But still, root can lift that protection again.



To sum it up, with great powers (root login or sudo access) comes great responsibility. If your friend thinks they must be prevented from altering system files like that, they should not have administrative access to the machine.






share|improve this answer
























  • Perhaps I've misread the situation but it's worth noting that modifications will be recorded, that the system can be set to log sudo commands; you could have off-site journals to get around local modification of log files, but it starts getting super convoluted IMO. (Maybe point a private webcam at the computer.)

    – pbhj
    Jan 3 at 16:54











  • An excellent, concise answer that covers all the bases. This is the right way to look at the problem.

    – user535733
    Jan 3 at 17:02
















1












1








1







Nope, the root user can not possibly be restricted. If you have root access, you can do everything and also revert all kinds of protections one could think of.



Besides, you should normally not directly use the root account anyway but log in as regular user and use sudo to run single commands with elevated permissions. This also helps preventing some accidental changes, compared to always operating in a root shell.



To further protect against accidental modification, you could make the file immutable using



sudo chattr +i /etc/hosts


to prevent modifications by everybody, including root and system processes (which might be something that could cause trouble depending on the file and what you're doing with it). But still, root can lift that protection again.



To sum it up, with great powers (root login or sudo access) comes great responsibility. If your friend thinks they must be prevented from altering system files like that, they should not have administrative access to the machine.






share|improve this answer













Nope, the root user can not possibly be restricted. If you have root access, you can do everything and also revert all kinds of protections one could think of.



Besides, you should normally not directly use the root account anyway but log in as regular user and use sudo to run single commands with elevated permissions. This also helps preventing some accidental changes, compared to always operating in a root shell.



To further protect against accidental modification, you could make the file immutable using



sudo chattr +i /etc/hosts


to prevent modifications by everybody, including root and system processes (which might be something that could cause trouble depending on the file and what you're doing with it). But still, root can lift that protection again.



To sum it up, with great powers (root login or sudo access) comes great responsibility. If your friend thinks they must be prevented from altering system files like that, they should not have administrative access to the machine.







share|improve this answer












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share|improve this answer










answered Jan 3 at 16:07









Byte CommanderByte Commander

63.7k26173292




63.7k26173292













  • Perhaps I've misread the situation but it's worth noting that modifications will be recorded, that the system can be set to log sudo commands; you could have off-site journals to get around local modification of log files, but it starts getting super convoluted IMO. (Maybe point a private webcam at the computer.)

    – pbhj
    Jan 3 at 16:54











  • An excellent, concise answer that covers all the bases. This is the right way to look at the problem.

    – user535733
    Jan 3 at 17:02





















  • Perhaps I've misread the situation but it's worth noting that modifications will be recorded, that the system can be set to log sudo commands; you could have off-site journals to get around local modification of log files, but it starts getting super convoluted IMO. (Maybe point a private webcam at the computer.)

    – pbhj
    Jan 3 at 16:54











  • An excellent, concise answer that covers all the bases. This is the right way to look at the problem.

    – user535733
    Jan 3 at 17:02



















Perhaps I've misread the situation but it's worth noting that modifications will be recorded, that the system can be set to log sudo commands; you could have off-site journals to get around local modification of log files, but it starts getting super convoluted IMO. (Maybe point a private webcam at the computer.)

– pbhj
Jan 3 at 16:54





Perhaps I've misread the situation but it's worth noting that modifications will be recorded, that the system can be set to log sudo commands; you could have off-site journals to get around local modification of log files, but it starts getting super convoluted IMO. (Maybe point a private webcam at the computer.)

– pbhj
Jan 3 at 16:54













An excellent, concise answer that covers all the bases. This is the right way to look at the problem.

– user535733
Jan 3 at 17:02







An excellent, concise answer that covers all the bases. This is the right way to look at the problem.

– user535733
Jan 3 at 17:02




















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