Why would /etc/passwd be used every time someone executes `ls -l` command?
Read from APUE, just feel curious:
The password file is used every time a user logs in to a
UNIX system and every time someone executes anls -lcommand.
ls passwd
edited 13 mins ago
Olorin
3,8681721
asked 1 hour ago
RickRick
1165
add a comment |
Read from APUE, just feel curious:
The password file is used every time a user logs in to a
UNIX system and every time someone executes anls -lcommand.
ls passwd
edited 13 mins ago
Olorin
3,8681721
asked 1 hour ago
RickRick
1165
add a comment |
Read from APUE, just feel curious:
The password file is used every time a user logs in to a
UNIX system and every time someone executes anls -lcommand.
ls passwd
edited 13 mins ago
Olorin
3,8681721
asked 1 hour ago
RickRick
1165
Read from APUE, just feel curious:
The password file is used every time a user logs in to a
UNIX system and every time someone executes anls -lcommand.
ls passwd
ls passwd
edited 13 mins ago
Olorin
3,8681721
asked 1 hour ago
RickRick
1165
edited 13 mins ago
Olorin
3,8681721
asked 1 hour ago
RickRick
1165
edited 13 mins ago
Olorin
3,8681721
edited 13 mins ago
Olorin
3,8681721
edited 13 mins ago
Olorin
3,8681721
3,8681721
asked 1 hour ago
RickRick
1165
asked 1 hour ago
RickRick
1165
asked 1 hour ago
RickRick
1165
1165
add a comment |
add a comment |
1 Answer
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The file-system directly associates the numerical UID (User ID) and GID (Group ID) values with the file, not the user name and group name (which are strings). So the ls -l command (and any other command that displays the user and group owner of a file) need to get the user and group names from somewhere. The /etc/passwd file is one such source (probably the original and most common source). The manual bears this out - from PASSWD (5) (i.e. the man page for the /etc/passwd file):
many utilities, like ls(1) use it to map user IDs to usernames
answered 37 mins ago
igaligal
5,3161234
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
The file-system directly associates the numerical UID (User ID) and GID (Group ID) values with the file, not the user name and group name (which are strings). So the ls -l command (and any other command that displays the user and group owner of a file) need to get the user and group names from somewhere. The /etc/passwd file is one such source (probably the original and most common source). The manual bears this out - from PASSWD (5) (i.e. the man page for the /etc/passwd file):
many utilities, like ls(1) use it to map user IDs to usernames
answered 37 mins ago
igaligal
5,3161234
add a comment |
The file-system directly associates the numerical UID (User ID) and GID (Group ID) values with the file, not the user name and group name (which are strings). So the ls -l command (and any other command that displays the user and group owner of a file) need to get the user and group names from somewhere. The /etc/passwd file is one such source (probably the original and most common source). The manual bears this out - from PASSWD (5) (i.e. the man page for the /etc/passwd file):
many utilities, like ls(1) use it to map user IDs to usernames
answered 37 mins ago
igaligal
5,3161234
add a comment |
The file-system directly associates the numerical UID (User ID) and GID (Group ID) values with the file, not the user name and group name (which are strings). So the ls -l command (and any other command that displays the user and group owner of a file) need to get the user and group names from somewhere. The /etc/passwd file is one such source (probably the original and most common source). The manual bears this out - from PASSWD (5) (i.e. the man page for the /etc/passwd file):
many utilities, like ls(1) use it to map user IDs to usernames
answered 37 mins ago
igaligal
5,3161234
The file-system directly associates the numerical UID (User ID) and GID (Group ID) values with the file, not the user name and group name (which are strings). So the ls -l command (and any other command that displays the user and group owner of a file) need to get the user and group names from somewhere. The /etc/passwd file is one such source (probably the original and most common source). The manual bears this out - from PASSWD (5) (i.e. the man page for the /etc/passwd file):
many utilities, like ls(1) use it to map user IDs to usernames
answered 37 mins ago
igaligal
5,3161234
edited 31 mins ago
answered 37 mins ago
igaligal
5,3161234
answered 37 mins ago
igaligal
5,3161234
answered 37 mins ago
igaligal
5,3161234
5,3161234
add a comment |
add a comment |
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