what is the difference between /etc/shadow and /etc/passwd [closed]
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What is the major difference between /etc/shadow and /etc/passwd
In /etc/shadow we have the same data as in /etc/passwd.
passwd shadow
edited Aug 7 at 9:40
sai sasanka
54019
asked Aug 7 at 9:32
Rahul Kamboj
1025
closed as off-topic by dr01, msp9011, Jeff Schaller, Thomas, jimmij Aug 7 at 19:41
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Requests for learning materials (tutorials, how-tos etc.) are off topic. The only exception is questions about where to find official documentation (e.g. POSIX specifications). See the Help Center and our Community Meta for more information." – dr01, msp9011, Thomas, jimmij
add a comment |Â
up vote
-2
down vote
favorite
What is the major difference between /etc/shadow and /etc/passwd
In /etc/shadow we have the same data as in /etc/passwd.
passwd shadow
edited Aug 7 at 9:40
sai sasanka
54019
asked Aug 7 at 9:32
Rahul Kamboj
1025
closed as off-topic by dr01, msp9011, Jeff Schaller, Thomas, jimmij Aug 7 at 19:41
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Requests for learning materials (tutorials, how-tos etc.) are off topic. The only exception is questions about where to find official documentation (e.g. POSIX specifications). See the Help Center and our Community Meta for more information." – dr01, msp9011, Thomas, jimmij
I can't comment but you can find informations there : askubuntu.com/questions/445361/…
– Romain
Aug 7 at 9:39
This question is predicated upon two false premises. First: We don't necessarily have/etc/shadowin the first place, although some of us might have an/etc/spwd.db. Second: They do not have the same data.
– JdeBP
Aug 7 at 13:37
1
There is no request for learning materials in this question, as three people have so far flagged it. That is an abuse of that closure reason.
– JdeBP
Aug 7 at 13:39
add a comment |Â
up vote
-2
down vote
favorite
up vote
-2
down vote
favorite
What is the major difference between /etc/shadow and /etc/passwd
In /etc/shadow we have the same data as in /etc/passwd.
passwd shadow
edited Aug 7 at 9:40
sai sasanka
54019
asked Aug 7 at 9:32
Rahul Kamboj
1025
What is the major difference between /etc/shadow and /etc/passwd
In /etc/shadow we have the same data as in /etc/passwd.
passwd shadow
passwd shadow
edited Aug 7 at 9:40
sai sasanka
54019
asked Aug 7 at 9:32
Rahul Kamboj
1025
edited Aug 7 at 9:40
sai sasanka
54019
asked Aug 7 at 9:32
Rahul Kamboj
1025
edited Aug 7 at 9:40
sai sasanka
54019
edited Aug 7 at 9:40
sai sasanka
54019
edited Aug 7 at 9:40
sai sasanka
54019
54019
asked Aug 7 at 9:32
Rahul Kamboj
1025
asked Aug 7 at 9:32
Rahul Kamboj
1025
asked Aug 7 at 9:32
Rahul Kamboj
1025
1025
closed as off-topic by dr01, msp9011, Jeff Schaller, Thomas, jimmij Aug 7 at 19:41
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Requests for learning materials (tutorials, how-tos etc.) are off topic. The only exception is questions about where to find official documentation (e.g. POSIX specifications). See the Help Center and our Community Meta for more information." – dr01, msp9011, Thomas, jimmij
closed as off-topic by dr01, msp9011, Jeff Schaller, Thomas, jimmij Aug 7 at 19:41
This question appears to be off-topic. The users who voted to close gave this specific reason:
- "Requests for learning materials (tutorials, how-tos etc.) are off topic. The only exception is questions about where to find official documentation (e.g. POSIX specifications). See the Help Center and our Community Meta for more information." – dr01, msp9011, Thomas, jimmij
I can't comment but you can find informations there : askubuntu.com/questions/445361/…
– Romain
Aug 7 at 9:39
This question is predicated upon two false premises. First: We don't necessarily have/etc/shadowin the first place, although some of us might have an/etc/spwd.db. Second: They do not have the same data.
– JdeBP
Aug 7 at 13:37
1
There is no request for learning materials in this question, as three people have so far flagged it. That is an abuse of that closure reason.
– JdeBP
Aug 7 at 13:39
add a comment |Â
I can't comment but you can find informations there : askubuntu.com/questions/445361/…
– Romain
Aug 7 at 9:39
This question is predicated upon two false premises. First: We don't necessarily have/etc/shadowin the first place, although some of us might have an/etc/spwd.db. Second: They do not have the same data.
– JdeBP
Aug 7 at 13:37
1
There is no request for learning materials in this question, as three people have so far flagged it. That is an abuse of that closure reason.
– JdeBP
Aug 7 at 13:39
I can't comment but you can find informations there : askubuntu.com/questions/445361/…
– Romain
Aug 7 at 9:39
I can't comment but you can find informations there : askubuntu.com/questions/445361/…
– Romain
Aug 7 at 9:39
This question is predicated upon two false premises. First: We don't necessarily have
/etc/shadow in the first place, although some of us might have an /etc/spwd.db. Second: They do not have the same data.– JdeBP
Aug 7 at 13:37
This question is predicated upon two false premises. First: We don't necessarily have
/etc/shadow in the first place, although some of us might have an /etc/spwd.db. Second: They do not have the same data.– JdeBP
Aug 7 at 13:37
1
1
There is no request for learning materials in this question, as three people have so far flagged it. That is an abuse of that closure reason.
– JdeBP
Aug 7 at 13:39
There is no request for learning materials in this question, as three people have so far flagged it. That is an abuse of that closure reason.
– JdeBP
Aug 7 at 13:39
add a comment |Â
3 Answers
3
active
oldest
votes
up vote
1
down vote
accepted
Historically /etc/passwd had all of the user data, there was no shadow.
However it was discovered that a dictionary attack could be done on the file, to discover passwords (if they are in the dictionary).
Therefore it was decided to remove the passwords from /etc/passwd, the rest of the file remained, as it was used my many programs e.g. ls. The passwords were moved to /etc/shadow, and this file was made so that only root can read it.
/etc/passwd now has an x for the password field./etc/shadow only shares the first field (the key-field / the user name)./etc/shadow has been expanded to contain other password management fields.
answered Aug 7 at 9:41
ctrl-alt-delor
9,12931948
add a comment |Â
up vote
1
down vote
The existence of the two files is a consequence of that /etc/passwd is a text file that can be read by other applications (as finger, ident or ls for example), so an attacker could gain access to the information of the file that included the hashed password.
To increase security, the hashed password that used to be in the file was moved to other file called /etc/shadow that is accessible only by root
answered Aug 7 at 9:43
jcbermu
3,254719
add a comment |Â
up vote
0
down vote
The major difference is that they contain different pieces of data.
passwd contains the users' public information (UID, full name, home directory), while shadow contains the hashed password and the password expiry data. The reasons for the division are partly historical.
See the man pages: passwd(1) and shadow(1)
answered Aug 7 at 12:16
ilkkachu
50.9k678140
add a comment |Â
3 Answers
3
active
oldest
votes
3 Answers
3
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
accepted
Historically /etc/passwd had all of the user data, there was no shadow.
However it was discovered that a dictionary attack could be done on the file, to discover passwords (if they are in the dictionary).
Therefore it was decided to remove the passwords from /etc/passwd, the rest of the file remained, as it was used my many programs e.g. ls. The passwords were moved to /etc/shadow, and this file was made so that only root can read it.
/etc/passwd now has an x for the password field./etc/shadow only shares the first field (the key-field / the user name)./etc/shadow has been expanded to contain other password management fields.
answered Aug 7 at 9:41
ctrl-alt-delor
9,12931948
add a comment |Â
up vote
1
down vote
accepted
Historically /etc/passwd had all of the user data, there was no shadow.
However it was discovered that a dictionary attack could be done on the file, to discover passwords (if they are in the dictionary).
Therefore it was decided to remove the passwords from /etc/passwd, the rest of the file remained, as it was used my many programs e.g. ls. The passwords were moved to /etc/shadow, and this file was made so that only root can read it.
/etc/passwd now has an x for the password field./etc/shadow only shares the first field (the key-field / the user name)./etc/shadow has been expanded to contain other password management fields.
answered Aug 7 at 9:41
ctrl-alt-delor
9,12931948
add a comment |Â
up vote
1
down vote
accepted
up vote
1
down vote
accepted
Historically /etc/passwd had all of the user data, there was no shadow.
However it was discovered that a dictionary attack could be done on the file, to discover passwords (if they are in the dictionary).
Therefore it was decided to remove the passwords from /etc/passwd, the rest of the file remained, as it was used my many programs e.g. ls. The passwords were moved to /etc/shadow, and this file was made so that only root can read it.
/etc/passwd now has an x for the password field./etc/shadow only shares the first field (the key-field / the user name)./etc/shadow has been expanded to contain other password management fields.
answered Aug 7 at 9:41
ctrl-alt-delor
9,12931948
Historically /etc/passwd had all of the user data, there was no shadow.
However it was discovered that a dictionary attack could be done on the file, to discover passwords (if they are in the dictionary).
Therefore it was decided to remove the passwords from /etc/passwd, the rest of the file remained, as it was used my many programs e.g. ls. The passwords were moved to /etc/shadow, and this file was made so that only root can read it.
/etc/passwd now has an x for the password field./etc/shadow only shares the first field (the key-field / the user name)./etc/shadow has been expanded to contain other password management fields.
answered Aug 7 at 9:41
ctrl-alt-delor
9,12931948
edited Aug 7 at 9:47
answered Aug 7 at 9:41
ctrl-alt-delor
9,12931948
answered Aug 7 at 9:41
ctrl-alt-delor
9,12931948
answered Aug 7 at 9:41
ctrl-alt-delor
9,12931948
9,12931948
add a comment |Â
add a comment |Â
up vote
1
down vote
The existence of the two files is a consequence of that /etc/passwd is a text file that can be read by other applications (as finger, ident or ls for example), so an attacker could gain access to the information of the file that included the hashed password.
To increase security, the hashed password that used to be in the file was moved to other file called /etc/shadow that is accessible only by root
answered Aug 7 at 9:43
jcbermu
3,254719
add a comment |Â
up vote
1
down vote
The existence of the two files is a consequence of that /etc/passwd is a text file that can be read by other applications (as finger, ident or ls for example), so an attacker could gain access to the information of the file that included the hashed password.
To increase security, the hashed password that used to be in the file was moved to other file called /etc/shadow that is accessible only by root
answered Aug 7 at 9:43
jcbermu
3,254719
add a comment |Â
up vote
1
down vote
up vote
1
down vote
The existence of the two files is a consequence of that /etc/passwd is a text file that can be read by other applications (as finger, ident or ls for example), so an attacker could gain access to the information of the file that included the hashed password.
To increase security, the hashed password that used to be in the file was moved to other file called /etc/shadow that is accessible only by root
answered Aug 7 at 9:43
jcbermu
3,254719
The existence of the two files is a consequence of that /etc/passwd is a text file that can be read by other applications (as finger, ident or ls for example), so an attacker could gain access to the information of the file that included the hashed password.
To increase security, the hashed password that used to be in the file was moved to other file called /etc/shadow that is accessible only by root
answered Aug 7 at 9:43
jcbermu
3,254719
edited Aug 7 at 9:48
answered Aug 7 at 9:43
jcbermu
3,254719
answered Aug 7 at 9:43
jcbermu
3,254719
answered Aug 7 at 9:43
jcbermu
3,254719
3,254719
add a comment |Â
add a comment |Â
up vote
0
down vote
The major difference is that they contain different pieces of data.
passwd contains the users' public information (UID, full name, home directory), while shadow contains the hashed password and the password expiry data. The reasons for the division are partly historical.
See the man pages: passwd(1) and shadow(1)
answered Aug 7 at 12:16
ilkkachu
50.9k678140
add a comment |Â
up vote
0
down vote
The major difference is that they contain different pieces of data.
passwd contains the users' public information (UID, full name, home directory), while shadow contains the hashed password and the password expiry data. The reasons for the division are partly historical.
See the man pages: passwd(1) and shadow(1)
answered Aug 7 at 12:16
ilkkachu
50.9k678140
add a comment |Â
up vote
0
down vote
up vote
0
down vote
The major difference is that they contain different pieces of data.
passwd contains the users' public information (UID, full name, home directory), while shadow contains the hashed password and the password expiry data. The reasons for the division are partly historical.
See the man pages: passwd(1) and shadow(1)
answered Aug 7 at 12:16
ilkkachu
50.9k678140
The major difference is that they contain different pieces of data.
passwd contains the users' public information (UID, full name, home directory), while shadow contains the hashed password and the password expiry data. The reasons for the division are partly historical.
See the man pages: passwd(1) and shadow(1)
answered Aug 7 at 12:16
ilkkachu
50.9k678140
answered Aug 7 at 12:16
ilkkachu
50.9k678140
answered Aug 7 at 12:16
ilkkachu
50.9k678140
answered Aug 7 at 12:16
ilkkachu
50.9k678140
50.9k678140
add a comment |Â
add a comment |Â
I can't comment but you can find informations there : askubuntu.com/questions/445361/…
– Romain
Aug 7 at 9:39
This question is predicated upon two false premises. First: We don't necessarily have
/etc/shadowin the first place, although some of us might have an/etc/spwd.db. Second: They do not have the same data.– JdeBP
Aug 7 at 13:37
1
There is no request for learning materials in this question, as three people have so far flagged it. That is an abuse of that closure reason.
– JdeBP
Aug 7 at 13:39