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Full Discussion: A couple issues
Top Forums Shell Programming and Scripting A couple issues Post 302514470 by Simonpalmieri on Friday 15th of April 2011 07:47:01 PM
Old 04-15-2011
A couple issues

Hello, I have a couple questions. First of all, I'm trying to use the wc command on the /etc/passwd file to find out the total amount of users but I am unsuccesful. I figured since users each have their own line in the passwd file that i could have it count the number of lines and then return the number and that number would be my total amount of users in the system. Also, this may seem like a stupid question but how do i save or overwrite a file in a shell script?

Thanks
 

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vipw(8) 						      System Manager's Manual							   vipw(8)

NAME
vipw - Edits the /etc/passwd file SYNOPSIS
/usr/sbin/vipw DESCRIPTION
You use the vipw command to edit the /etc/passwd file with the editor defined in the EDITOR environment variable. If the variable is not set, the default editor is vi. The vipw command performs basic consistency checks on the edited file. If a hashed indexed passwd existed previously, the vipw command uses the mkpasswd command to create recreate it. The command must not be used on systems that use extended security attributes since it cannot set or change them. You must be root to run this command. Only root and security administrators should have execute access to this command. Since the vipw command cannot effectively change all the attributes of users, it should not be used in a secure environment. The vipw command accesses the following files, and requires the listed permissions: ------------------------------ Permissions File ------------------------------ rw /etc/passwd rw /etc/passwd.pag rw /etc/passwd.dir rw /etc/ptmp rw /etc/ptmp.pag rw /etc/ptmp.dir ------------------------------ EXAMPLE
To edit the /etc/passwd file, type the following command and add the required line entry: vipw FILES
Specifies the command path RELATED INFORMATION
Commands: passwd(1), passwd(4), adduser(8), mkpasswd(8) delim off vipw(8)
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