lfs-book-zh_CN/chapter06/pwdgroup.xml

<sect1 id="ch06-pwdgroup">
<title>Creating passwd and group files</title>
<?dbhtml filename="pwdgroup.html" dir="chapter06"?>

<para>In order for the user and the group "root" to be recognized and to be
able to login, there need to be entries in the /etc/passwd and /etc/group file. 
Besides the group "root", a couple of other groups are recommended or needed
by some packages. The groups created below aren't part of any standard.
The LSB only recommends a group "bin" with GID 1 to be present besides 
"root". Other group names and GIDs can be chosen by the user.
Well-written packages don't depend on GID numbers, but use the group's
name; so it doesn't matter which GID a group has. Since there
aren't any standards for groups, the groups created here are the groups the
MAKEDEV script (the script that creates the device files in the /dev
directory) mentions.</para>

<para>Create a new file <filename>/etc/passwd</filename> by running the
following command:</para>

<para><screen><userinput>echo "root:x:0:0:root:/root:/bin/bash" &gt; /etc/passwd</userinput></screen></para>

<para>Create a new file <filename>/etc/group</filename> by running the
following command:</para>

<para><screen><userinput>cat &gt; /etc/group &lt;&lt; "EOF"</userinput>
root:x:0:
bin:x:1:
sys:x:2:
kmem:x:3:
tty:x:4:
tape:x:5:
daemon:x:6:
floppy:x:7:
disk:x:8:
lp:x:9:
dialout:x:10:
audio:x:11:
<userinput>EOF</userinput></screen></para>

</sect1>