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Full Discussion: How to extract fields from etc/passwd file?
Top Forums UNIX for Dummies Questions & Answers How to extract fields from etc/passwd file? Post 302593736 by drl on Saturday 28th of January 2012 11:31:21 AM
Old 01-28-2012
Hi.
Quote:
Originally Posted by strawhatluffy
...but cut can be used to extract olny one field and not two ...
As Scott noted this is not usually the case, and is contrary to every man page on cut that I have seen.

This suggests to me that you did not look at man cut or that you did not understand it.

Your best first step to becoming self-sufficient for *nix support is to cultivate the habit of looking at man pages. On some systems, additional information is available by looking at info pages, for example info cut. The man pages often are not tutorials, but, notwithstanding how good responses here here at unix.com are, man pages are certainly a better initial action to get factual answers rather than spending time composing forum posts and waiting for responses. The next step is searching, using Google, for example.

Best wishes on advancing your *nix knowledge ... cheers, drl
 

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LEARN ABOUT XFREE86

pwconv

pwconv(1M)                                                System Administration Commands                                                pwconv(1M)

NAME

       pwconv - installs and updates /etc/shadow with information from /etc/passwd

SYNOPSIS

       pwconv

DESCRIPTION

       The pwconv command creates and updates /etc/shadow with information from /etc/passwd.

       pwconv relies on a special value of 'x' in the password field of /etc/passwd. This value of 'x' indicates that the password for the user is
       already in /etc/shadow and should not be modified.

       If the /etc/shadow file does not exist, this command will create /etc/shadow with  information  from  /etc/passwd.  The  command  populates
       /etc/shadow  with  the  user's  login  name,  password,  and  password  aging  information. If password aging information does not exist in
       /etc/passwd for a given user, none will be added to  /etc/shadow. However, the last changed information will always be updated.

       If the  /etc/shadow file does exist, the following tasks will be performed:

                Entries that are in the  /etc/passwd file and not in the /etc/shadow file will be added to the /etc/shadow file.

                Entries that are in the  /etc/shadow file and not in the /etc/passwd file will be removed from /etc/shadow.

                Password attributes (for example, password and aging information)  that exist in an /etc/passwd entry will be moved to the  corre-
                sponding entry in  /etc/shadow.

       The pwconv command can only be used by the super-user.

FILES

       /etc/opasswd

       /etc/oshadow

       /etc/passwd

       /etc/shadow

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWcsu                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       passwd(1), passmgmt(1M), usermod(1M), passwd(4), attributes(5)

DIAGNOSTICS

       pwconv exits with one of the following values:

       0        SUCCESS.

       1        Permission denied.

       2        Invalid command syntax.

       3        Unexpected failure.  Conversion not done.

       4        Unexpected failure.  Password file(s) missing.

       5        Password file(s) busy.  Try again later.

       6        Bad entry in /etc/shadow file.

SunOS 5.10                                                          9 Mar 1993                                                          pwconv(1M)
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