What is the meaning of “usr”? [duplicate]
This question already has an answer here:
How to understand the Ubuntu file system layout?
6 answers
Does it mean "user"? I attempted to navigate to usr via cd
however I received No such file or directory
error.
I could only find in Russian the following information:
"/usr (от англ. User System Resources — системные ресурсы
пользователя) — каталог в UNIX-подобных системах, содержащий
динамически компонуемые программы, файлы пользователей и программы,
устанавливаемые вручную. В соответствии с FHS, монтируется на корневую
файловую систему и должен содержать только не изменяющиеся программами
данные (то есть /usr в режиме эксплуатации может быть смонтирован в
режиме «только для чтения» без ущерба для функциональности)[1].
Традиционная система подкаталогов /usr/ Вторичная иерархия для данных
пользователя; содержит большинство пользовательских приложений и
утилит, используемых в многопользовательском режиме. Может быть
смонтирована по сети только для чтения и быть общей для нескольких
машин[2]. /usr/bin/"
However, I don't understand.
Translation of the quote:
/usr
( from English "User System Resources" ) - catalogue/directory in UNIX-like systems, containing dynamically combined programs, user files and manually-installed programs. In accordance with FHS, it is mounted on root filesystem and must contain only data which is not to be modified by programs (that is to say, /usr in operational mode can be mounted as read-only without loss of functionality)
Traditional system of subdirectories /usr/ Secondary hierarchy for user's data; contain most user's applications andutilities, used in multiuser mode. Can be mounted over network only in read-only mode, and can be shared between multiple machines.
command-line
marked as duplicate by Kevin Bowen, Eric Carvalho, Charles Green, Fabby, Volker Siegel Feb 24 at 2:33
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
add a comment |
This question already has an answer here:
How to understand the Ubuntu file system layout?
6 answers
Does it mean "user"? I attempted to navigate to usr via cd
however I received No such file or directory
error.
I could only find in Russian the following information:
"/usr (от англ. User System Resources — системные ресурсы
пользователя) — каталог в UNIX-подобных системах, содержащий
динамически компонуемые программы, файлы пользователей и программы,
устанавливаемые вручную. В соответствии с FHS, монтируется на корневую
файловую систему и должен содержать только не изменяющиеся программами
данные (то есть /usr в режиме эксплуатации может быть смонтирован в
режиме «только для чтения» без ущерба для функциональности)[1].
Традиционная система подкаталогов /usr/ Вторичная иерархия для данных
пользователя; содержит большинство пользовательских приложений и
утилит, используемых в многопользовательском режиме. Может быть
смонтирована по сети только для чтения и быть общей для нескольких
машин[2]. /usr/bin/"
However, I don't understand.
Translation of the quote:
/usr
( from English "User System Resources" ) - catalogue/directory in UNIX-like systems, containing dynamically combined programs, user files and manually-installed programs. In accordance with FHS, it is mounted on root filesystem and must contain only data which is not to be modified by programs (that is to say, /usr in operational mode can be mounted as read-only without loss of functionality)
Traditional system of subdirectories /usr/ Secondary hierarchy for user's data; contain most user's applications andutilities, used in multiuser mode. Can be mounted over network only in read-only mode, and can be shared between multiple machines.
command-line
marked as duplicate by Kevin Bowen, Eric Carvalho, Charles Green, Fabby, Volker Siegel Feb 24 at 2:33
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
6
What is the question? You gave the answer what usr means.
– Pilot6
Feb 23 at 8:56
I'll write an answer in English first, then translate it into Russian. So hold on there
– Sergiy Kolodyazhnyy
Feb 23 at 9:36
cd /usr
should not fail. Is your question about that? If so it's not a [mcve]. Or is it about what/usr
is? If so it's mis-tagged.
– Peter Cordes
Feb 23 at 18:33
Be explicit with commands: does "navigate to usr via cd" cd usr or cd /usr? The second may, or may not do the same than the first. Depends on the current directory.
– Volker Siegel
Feb 24 at 2:32
Thank you to everybody. Sure that after I ask question - what I m so foolish and begin once and once more search. Ubuntu Linux is for me very new and difficult. + I'm 70... I read your answer more and more - from first time it does not come to my head
– Anatoliy Dragan
6 hours ago
add a comment |
This question already has an answer here:
How to understand the Ubuntu file system layout?
6 answers
Does it mean "user"? I attempted to navigate to usr via cd
however I received No such file or directory
error.
I could only find in Russian the following information:
"/usr (от англ. User System Resources — системные ресурсы
пользователя) — каталог в UNIX-подобных системах, содержащий
динамически компонуемые программы, файлы пользователей и программы,
устанавливаемые вручную. В соответствии с FHS, монтируется на корневую
файловую систему и должен содержать только не изменяющиеся программами
данные (то есть /usr в режиме эксплуатации может быть смонтирован в
режиме «только для чтения» без ущерба для функциональности)[1].
Традиционная система подкаталогов /usr/ Вторичная иерархия для данных
пользователя; содержит большинство пользовательских приложений и
утилит, используемых в многопользовательском режиме. Может быть
смонтирована по сети только для чтения и быть общей для нескольких
машин[2]. /usr/bin/"
However, I don't understand.
Translation of the quote:
/usr
( from English "User System Resources" ) - catalogue/directory in UNIX-like systems, containing dynamically combined programs, user files and manually-installed programs. In accordance with FHS, it is mounted on root filesystem and must contain only data which is not to be modified by programs (that is to say, /usr in operational mode can be mounted as read-only without loss of functionality)
Traditional system of subdirectories /usr/ Secondary hierarchy for user's data; contain most user's applications andutilities, used in multiuser mode. Can be mounted over network only in read-only mode, and can be shared between multiple machines.
command-line
This question already has an answer here:
How to understand the Ubuntu file system layout?
6 answers
Does it mean "user"? I attempted to navigate to usr via cd
however I received No such file or directory
error.
I could only find in Russian the following information:
"/usr (от англ. User System Resources — системные ресурсы
пользователя) — каталог в UNIX-подобных системах, содержащий
динамически компонуемые программы, файлы пользователей и программы,
устанавливаемые вручную. В соответствии с FHS, монтируется на корневую
файловую систему и должен содержать только не изменяющиеся программами
данные (то есть /usr в режиме эксплуатации может быть смонтирован в
режиме «только для чтения» без ущерба для функциональности)[1].
Традиционная система подкаталогов /usr/ Вторичная иерархия для данных
пользователя; содержит большинство пользовательских приложений и
утилит, используемых в многопользовательском режиме. Может быть
смонтирована по сети только для чтения и быть общей для нескольких
машин[2]. /usr/bin/"
However, I don't understand.
Translation of the quote:
/usr
( from English "User System Resources" ) - catalogue/directory in UNIX-like systems, containing dynamically combined programs, user files and manually-installed programs. In accordance with FHS, it is mounted on root filesystem and must contain only data which is not to be modified by programs (that is to say, /usr in operational mode can be mounted as read-only without loss of functionality)
Traditional system of subdirectories /usr/ Secondary hierarchy for user's data; contain most user's applications andutilities, used in multiuser mode. Can be mounted over network only in read-only mode, and can be shared between multiple machines.
This question already has an answer here:
How to understand the Ubuntu file system layout?
6 answers
command-line
command-line
edited Feb 23 at 9:35
Sergiy Kolodyazhnyy
73.3k9153318
73.3k9153318
asked Feb 23 at 8:33
Anatoliy DraganAnatoliy Dragan
403
403
marked as duplicate by Kevin Bowen, Eric Carvalho, Charles Green, Fabby, Volker Siegel Feb 24 at 2:33
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
marked as duplicate by Kevin Bowen, Eric Carvalho, Charles Green, Fabby, Volker Siegel Feb 24 at 2:33
This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
6
What is the question? You gave the answer what usr means.
– Pilot6
Feb 23 at 8:56
I'll write an answer in English first, then translate it into Russian. So hold on there
– Sergiy Kolodyazhnyy
Feb 23 at 9:36
cd /usr
should not fail. Is your question about that? If so it's not a [mcve]. Or is it about what/usr
is? If so it's mis-tagged.
– Peter Cordes
Feb 23 at 18:33
Be explicit with commands: does "navigate to usr via cd" cd usr or cd /usr? The second may, or may not do the same than the first. Depends on the current directory.
– Volker Siegel
Feb 24 at 2:32
Thank you to everybody. Sure that after I ask question - what I m so foolish and begin once and once more search. Ubuntu Linux is for me very new and difficult. + I'm 70... I read your answer more and more - from first time it does not come to my head
– Anatoliy Dragan
6 hours ago
add a comment |
6
What is the question? You gave the answer what usr means.
– Pilot6
Feb 23 at 8:56
I'll write an answer in English first, then translate it into Russian. So hold on there
– Sergiy Kolodyazhnyy
Feb 23 at 9:36
cd /usr
should not fail. Is your question about that? If so it's not a [mcve]. Or is it about what/usr
is? If so it's mis-tagged.
– Peter Cordes
Feb 23 at 18:33
Be explicit with commands: does "navigate to usr via cd" cd usr or cd /usr? The second may, or may not do the same than the first. Depends on the current directory.
– Volker Siegel
Feb 24 at 2:32
Thank you to everybody. Sure that after I ask question - what I m so foolish and begin once and once more search. Ubuntu Linux is for me very new and difficult. + I'm 70... I read your answer more and more - from first time it does not come to my head
– Anatoliy Dragan
6 hours ago
6
6
What is the question? You gave the answer what usr means.
– Pilot6
Feb 23 at 8:56
What is the question? You gave the answer what usr means.
– Pilot6
Feb 23 at 8:56
I'll write an answer in English first, then translate it into Russian. So hold on there
– Sergiy Kolodyazhnyy
Feb 23 at 9:36
I'll write an answer in English first, then translate it into Russian. So hold on there
– Sergiy Kolodyazhnyy
Feb 23 at 9:36
cd /usr
should not fail. Is your question about that? If so it's not a [mcve]. Or is it about what /usr
is? If so it's mis-tagged.– Peter Cordes
Feb 23 at 18:33
cd /usr
should not fail. Is your question about that? If so it's not a [mcve]. Or is it about what /usr
is? If so it's mis-tagged.– Peter Cordes
Feb 23 at 18:33
Be explicit with commands: does "navigate to usr via cd" cd usr or cd /usr? The second may, or may not do the same than the first. Depends on the current directory.
– Volker Siegel
Feb 24 at 2:32
Be explicit with commands: does "navigate to usr via cd" cd usr or cd /usr? The second may, or may not do the same than the first. Depends on the current directory.
– Volker Siegel
Feb 24 at 2:32
Thank you to everybody. Sure that after I ask question - what I m so foolish and begin once and once more search. Ubuntu Linux is for me very new and difficult. + I'm 70... I read your answer more and more - from first time it does not come to my head
– Anatoliy Dragan
6 hours ago
Thank you to everybody. Sure that after I ask question - what I m so foolish and begin once and once more search. Ubuntu Linux is for me very new and difficult. + I'm 70... I read your answer more and more - from first time it does not come to my head
– Anatoliy Dragan
6 hours ago
add a comment |
3 Answers
3
active
oldest
votes
/usr
nowadays stands for User System Resources. This directory contains most commands and executables files, libraries and documentation. In the early days of Unix, it was the directory where the users' home directories were placed (your user home directory would have been /usr/anatoly
which now is /home/anatoly
), so originally it stood for User.
See Chapter 1. Linux Filesystem Hierarchy for details.
1
Change suggestion: 'stands for Unix System Resources.' => 'stands for Unix System Resources or as it is called sometimes as well Universal System Resources.'
– Videonauth
Feb 23 at 9:11
Thanks for suggesting the edit. According to The Linux Documentation Project 'usr' stands for 'User System Resources', so I changed the definition.
– heiflo
Feb 23 at 10:37
6
Who says it stands for (or originally stood for) "User System Resources"? Seems more likely that it's a back formation, and usr was originally just a way of saving a letter or two, in the same way that bin is short for binary (and a pun :-)) mv for move, cp for copy, &c.
– jamesqf
Feb 23 at 18:47
2
Yes, this will be a backronym.usr
wasn't spelleduser
because back in those days all communication with the computer was via teletypes, which were hell on fingers, and by punch cards, which is why virtually everything is so abbreviated.
– Michael Hampton
Feb 23 at 20:43
add a comment |
As has been explained in the quote in the question, /usr
directory stands for User System Resources. According to Debian documentation this includes applications which are not mandatory for the system to boot, and shared data (for instance /usr/share/applications
holds .desktop
files which are sort of shortcuts to actual application executable).
Note that the quote mentions the /usr
directory should be read-only and not modifiable by programs, which applies to /usr/lib
because it contains shared libraries which are critical for proper functionality of applications. However, some content such as /usr/share/applications
directory contains resources that are not system critical, and can be modified by admin-level user when necessary.
Как было указано в цитате которая приложена к вопросу, каталог (или директория) /usr
имеет значение User System Resources — системные ресурсы пользователя. Согласно Debian документации это влючает программы которые не обязательны для загрузки системы и общие данные (к примеру, /usr/share/applications
держит ссылки к программам). Важно заметить что в цитате сказано этот каталог должен быть смонтироват для чтения, что относится к таким под-каталогам как /usr/lib поскольку этот каталог включает общие библиотеки используемые многими программами что делает их критически важными. Но такие каталоги как /usr/share/applications не содержат системно-важных ресурсов и могут изменятся при необходимости административным пользователем.
add a comment |
Thre is a /usr
directory on Linux systems, used to hold resources used by everybody (typically all you applications are in /usr/bin
, /usr/lib
, and /usr/share
).
This directory is readable by all but only privileged users can write in it, which is rarely neededanyway since most files in /usr
in managed by package managers (the apt...
family, in Ubuntu).
add a comment |
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
/usr
nowadays stands for User System Resources. This directory contains most commands and executables files, libraries and documentation. In the early days of Unix, it was the directory where the users' home directories were placed (your user home directory would have been /usr/anatoly
which now is /home/anatoly
), so originally it stood for User.
See Chapter 1. Linux Filesystem Hierarchy for details.
1
Change suggestion: 'stands for Unix System Resources.' => 'stands for Unix System Resources or as it is called sometimes as well Universal System Resources.'
– Videonauth
Feb 23 at 9:11
Thanks for suggesting the edit. According to The Linux Documentation Project 'usr' stands for 'User System Resources', so I changed the definition.
– heiflo
Feb 23 at 10:37
6
Who says it stands for (or originally stood for) "User System Resources"? Seems more likely that it's a back formation, and usr was originally just a way of saving a letter or two, in the same way that bin is short for binary (and a pun :-)) mv for move, cp for copy, &c.
– jamesqf
Feb 23 at 18:47
2
Yes, this will be a backronym.usr
wasn't spelleduser
because back in those days all communication with the computer was via teletypes, which were hell on fingers, and by punch cards, which is why virtually everything is so abbreviated.
– Michael Hampton
Feb 23 at 20:43
add a comment |
/usr
nowadays stands for User System Resources. This directory contains most commands and executables files, libraries and documentation. In the early days of Unix, it was the directory where the users' home directories were placed (your user home directory would have been /usr/anatoly
which now is /home/anatoly
), so originally it stood for User.
See Chapter 1. Linux Filesystem Hierarchy for details.
1
Change suggestion: 'stands for Unix System Resources.' => 'stands for Unix System Resources or as it is called sometimes as well Universal System Resources.'
– Videonauth
Feb 23 at 9:11
Thanks for suggesting the edit. According to The Linux Documentation Project 'usr' stands for 'User System Resources', so I changed the definition.
– heiflo
Feb 23 at 10:37
6
Who says it stands for (or originally stood for) "User System Resources"? Seems more likely that it's a back formation, and usr was originally just a way of saving a letter or two, in the same way that bin is short for binary (and a pun :-)) mv for move, cp for copy, &c.
– jamesqf
Feb 23 at 18:47
2
Yes, this will be a backronym.usr
wasn't spelleduser
because back in those days all communication with the computer was via teletypes, which were hell on fingers, and by punch cards, which is why virtually everything is so abbreviated.
– Michael Hampton
Feb 23 at 20:43
add a comment |
/usr
nowadays stands for User System Resources. This directory contains most commands and executables files, libraries and documentation. In the early days of Unix, it was the directory where the users' home directories were placed (your user home directory would have been /usr/anatoly
which now is /home/anatoly
), so originally it stood for User.
See Chapter 1. Linux Filesystem Hierarchy for details.
/usr
nowadays stands for User System Resources. This directory contains most commands and executables files, libraries and documentation. In the early days of Unix, it was the directory where the users' home directories were placed (your user home directory would have been /usr/anatoly
which now is /home/anatoly
), so originally it stood for User.
See Chapter 1. Linux Filesystem Hierarchy for details.
edited Feb 23 at 10:15
answered Feb 23 at 9:07
heifloheiflo
1314
1314
1
Change suggestion: 'stands for Unix System Resources.' => 'stands for Unix System Resources or as it is called sometimes as well Universal System Resources.'
– Videonauth
Feb 23 at 9:11
Thanks for suggesting the edit. According to The Linux Documentation Project 'usr' stands for 'User System Resources', so I changed the definition.
– heiflo
Feb 23 at 10:37
6
Who says it stands for (or originally stood for) "User System Resources"? Seems more likely that it's a back formation, and usr was originally just a way of saving a letter or two, in the same way that bin is short for binary (and a pun :-)) mv for move, cp for copy, &c.
– jamesqf
Feb 23 at 18:47
2
Yes, this will be a backronym.usr
wasn't spelleduser
because back in those days all communication with the computer was via teletypes, which were hell on fingers, and by punch cards, which is why virtually everything is so abbreviated.
– Michael Hampton
Feb 23 at 20:43
add a comment |
1
Change suggestion: 'stands for Unix System Resources.' => 'stands for Unix System Resources or as it is called sometimes as well Universal System Resources.'
– Videonauth
Feb 23 at 9:11
Thanks for suggesting the edit. According to The Linux Documentation Project 'usr' stands for 'User System Resources', so I changed the definition.
– heiflo
Feb 23 at 10:37
6
Who says it stands for (or originally stood for) "User System Resources"? Seems more likely that it's a back formation, and usr was originally just a way of saving a letter or two, in the same way that bin is short for binary (and a pun :-)) mv for move, cp for copy, &c.
– jamesqf
Feb 23 at 18:47
2
Yes, this will be a backronym.usr
wasn't spelleduser
because back in those days all communication with the computer was via teletypes, which were hell on fingers, and by punch cards, which is why virtually everything is so abbreviated.
– Michael Hampton
Feb 23 at 20:43
1
1
Change suggestion: 'stands for Unix System Resources.' => 'stands for Unix System Resources or as it is called sometimes as well Universal System Resources.'
– Videonauth
Feb 23 at 9:11
Change suggestion: 'stands for Unix System Resources.' => 'stands for Unix System Resources or as it is called sometimes as well Universal System Resources.'
– Videonauth
Feb 23 at 9:11
Thanks for suggesting the edit. According to The Linux Documentation Project 'usr' stands for 'User System Resources', so I changed the definition.
– heiflo
Feb 23 at 10:37
Thanks for suggesting the edit. According to The Linux Documentation Project 'usr' stands for 'User System Resources', so I changed the definition.
– heiflo
Feb 23 at 10:37
6
6
Who says it stands for (or originally stood for) "User System Resources"? Seems more likely that it's a back formation, and usr was originally just a way of saving a letter or two, in the same way that bin is short for binary (and a pun :-)) mv for move, cp for copy, &c.
– jamesqf
Feb 23 at 18:47
Who says it stands for (or originally stood for) "User System Resources"? Seems more likely that it's a back formation, and usr was originally just a way of saving a letter or two, in the same way that bin is short for binary (and a pun :-)) mv for move, cp for copy, &c.
– jamesqf
Feb 23 at 18:47
2
2
Yes, this will be a backronym.
usr
wasn't spelled user
because back in those days all communication with the computer was via teletypes, which were hell on fingers, and by punch cards, which is why virtually everything is so abbreviated.– Michael Hampton
Feb 23 at 20:43
Yes, this will be a backronym.
usr
wasn't spelled user
because back in those days all communication with the computer was via teletypes, which were hell on fingers, and by punch cards, which is why virtually everything is so abbreviated.– Michael Hampton
Feb 23 at 20:43
add a comment |
As has been explained in the quote in the question, /usr
directory stands for User System Resources. According to Debian documentation this includes applications which are not mandatory for the system to boot, and shared data (for instance /usr/share/applications
holds .desktop
files which are sort of shortcuts to actual application executable).
Note that the quote mentions the /usr
directory should be read-only and not modifiable by programs, which applies to /usr/lib
because it contains shared libraries which are critical for proper functionality of applications. However, some content such as /usr/share/applications
directory contains resources that are not system critical, and can be modified by admin-level user when necessary.
Как было указано в цитате которая приложена к вопросу, каталог (или директория) /usr
имеет значение User System Resources — системные ресурсы пользователя. Согласно Debian документации это влючает программы которые не обязательны для загрузки системы и общие данные (к примеру, /usr/share/applications
держит ссылки к программам). Важно заметить что в цитате сказано этот каталог должен быть смонтироват для чтения, что относится к таким под-каталогам как /usr/lib поскольку этот каталог включает общие библиотеки используемые многими программами что делает их критически важными. Но такие каталоги как /usr/share/applications не содержат системно-важных ресурсов и могут изменятся при необходимости административным пользователем.
add a comment |
As has been explained in the quote in the question, /usr
directory stands for User System Resources. According to Debian documentation this includes applications which are not mandatory for the system to boot, and shared data (for instance /usr/share/applications
holds .desktop
files which are sort of shortcuts to actual application executable).
Note that the quote mentions the /usr
directory should be read-only and not modifiable by programs, which applies to /usr/lib
because it contains shared libraries which are critical for proper functionality of applications. However, some content such as /usr/share/applications
directory contains resources that are not system critical, and can be modified by admin-level user when necessary.
Как было указано в цитате которая приложена к вопросу, каталог (или директория) /usr
имеет значение User System Resources — системные ресурсы пользователя. Согласно Debian документации это влючает программы которые не обязательны для загрузки системы и общие данные (к примеру, /usr/share/applications
держит ссылки к программам). Важно заметить что в цитате сказано этот каталог должен быть смонтироват для чтения, что относится к таким под-каталогам как /usr/lib поскольку этот каталог включает общие библиотеки используемые многими программами что делает их критически важными. Но такие каталоги как /usr/share/applications не содержат системно-важных ресурсов и могут изменятся при необходимости административным пользователем.
add a comment |
As has been explained in the quote in the question, /usr
directory stands for User System Resources. According to Debian documentation this includes applications which are not mandatory for the system to boot, and shared data (for instance /usr/share/applications
holds .desktop
files which are sort of shortcuts to actual application executable).
Note that the quote mentions the /usr
directory should be read-only and not modifiable by programs, which applies to /usr/lib
because it contains shared libraries which are critical for proper functionality of applications. However, some content such as /usr/share/applications
directory contains resources that are not system critical, and can be modified by admin-level user when necessary.
Как было указано в цитате которая приложена к вопросу, каталог (или директория) /usr
имеет значение User System Resources — системные ресурсы пользователя. Согласно Debian документации это влючает программы которые не обязательны для загрузки системы и общие данные (к примеру, /usr/share/applications
держит ссылки к программам). Важно заметить что в цитате сказано этот каталог должен быть смонтироват для чтения, что относится к таким под-каталогам как /usr/lib поскольку этот каталог включает общие библиотеки используемые многими программами что делает их критически важными. Но такие каталоги как /usr/share/applications не содержат системно-важных ресурсов и могут изменятся при необходимости административным пользователем.
As has been explained in the quote in the question, /usr
directory stands for User System Resources. According to Debian documentation this includes applications which are not mandatory for the system to boot, and shared data (for instance /usr/share/applications
holds .desktop
files which are sort of shortcuts to actual application executable).
Note that the quote mentions the /usr
directory should be read-only and not modifiable by programs, which applies to /usr/lib
because it contains shared libraries which are critical for proper functionality of applications. However, some content such as /usr/share/applications
directory contains resources that are not system critical, and can be modified by admin-level user when necessary.
Как было указано в цитате которая приложена к вопросу, каталог (или директория) /usr
имеет значение User System Resources — системные ресурсы пользователя. Согласно Debian документации это влючает программы которые не обязательны для загрузки системы и общие данные (к примеру, /usr/share/applications
держит ссылки к программам). Важно заметить что в цитате сказано этот каталог должен быть смонтироват для чтения, что относится к таким под-каталогам как /usr/lib поскольку этот каталог включает общие библиотеки используемые многими программами что делает их критически важными. Но такие каталоги как /usr/share/applications не содержат системно-важных ресурсов и могут изменятся при необходимости административным пользователем.
edited Feb 23 at 10:14
answered Feb 23 at 10:02
Sergiy KolodyazhnyySergiy Kolodyazhnyy
73.3k9153318
73.3k9153318
add a comment |
add a comment |
Thre is a /usr
directory on Linux systems, used to hold resources used by everybody (typically all you applications are in /usr/bin
, /usr/lib
, and /usr/share
).
This directory is readable by all but only privileged users can write in it, which is rarely neededanyway since most files in /usr
in managed by package managers (the apt...
family, in Ubuntu).
add a comment |
Thre is a /usr
directory on Linux systems, used to hold resources used by everybody (typically all you applications are in /usr/bin
, /usr/lib
, and /usr/share
).
This directory is readable by all but only privileged users can write in it, which is rarely neededanyway since most files in /usr
in managed by package managers (the apt...
family, in Ubuntu).
add a comment |
Thre is a /usr
directory on Linux systems, used to hold resources used by everybody (typically all you applications are in /usr/bin
, /usr/lib
, and /usr/share
).
This directory is readable by all but only privileged users can write in it, which is rarely neededanyway since most files in /usr
in managed by package managers (the apt...
family, in Ubuntu).
Thre is a /usr
directory on Linux systems, used to hold resources used by everybody (typically all you applications are in /usr/bin
, /usr/lib
, and /usr/share
).
This directory is readable by all but only privileged users can write in it, which is rarely neededanyway since most files in /usr
in managed by package managers (the apt...
family, in Ubuntu).
edited Feb 23 at 12:55
answered Feb 23 at 9:21
xenoidxenoid
1,7531416
1,7531416
add a comment |
add a comment |
6
What is the question? You gave the answer what usr means.
– Pilot6
Feb 23 at 8:56
I'll write an answer in English first, then translate it into Russian. So hold on there
– Sergiy Kolodyazhnyy
Feb 23 at 9:36
cd /usr
should not fail. Is your question about that? If so it's not a [mcve]. Or is it about what/usr
is? If so it's mis-tagged.– Peter Cordes
Feb 23 at 18:33
Be explicit with commands: does "navigate to usr via cd" cd usr or cd /usr? The second may, or may not do the same than the first. Depends on the current directory.
– Volker Siegel
Feb 24 at 2:32
Thank you to everybody. Sure that after I ask question - what I m so foolish and begin once and once more search. Ubuntu Linux is for me very new and difficult. + I'm 70... I read your answer more and more - from first time it does not come to my head
– Anatoliy Dragan
6 hours ago