249 lines
3.8 KiB
HTML
249 lines
3.8 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
|
||
<HTML
|
||
><HEAD
|
||
><TITLE
|
||
>Managing users</TITLE
|
||
><META
|
||
NAME="GENERATOR"
|
||
CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK
|
||
REL="HOME"
|
||
TITLE="GNU/Linux Command-Line Tools Summary"
|
||
HREF="index.html"><LINK
|
||
REL="PREVIOUS"
|
||
TITLE="Controlling services"
|
||
HREF="controlling-services.html"><LINK
|
||
REL="NEXT"
|
||
TITLE="Users/Groups"
|
||
HREF="users-and-groups.html"></HEAD
|
||
><BODY
|
||
CLASS="CHAPTER"
|
||
BGCOLOR="#FFFFFF"
|
||
TEXT="#000000"
|
||
LINK="#0000FF"
|
||
VLINK="#840084"
|
||
ALINK="#0000FF"
|
||
><DIV
|
||
CLASS="NAVHEADER"
|
||
><TABLE
|
||
SUMMARY="Header navigation table"
|
||
WIDTH="100%"
|
||
BORDER="0"
|
||
CELLPADDING="0"
|
||
CELLSPACING="0"
|
||
><TR
|
||
><TH
|
||
COLSPAN="3"
|
||
ALIGN="center"
|
||
>GNU/Linux Command-Line Tools Summary</TH
|
||
></TR
|
||
><TR
|
||
><TD
|
||
WIDTH="10%"
|
||
ALIGN="left"
|
||
VALIGN="bottom"
|
||
><A
|
||
HREF="controlling-services.html"
|
||
ACCESSKEY="P"
|
||
>Prev</A
|
||
></TD
|
||
><TD
|
||
WIDTH="80%"
|
||
ALIGN="center"
|
||
VALIGN="bottom"
|
||
></TD
|
||
><TD
|
||
WIDTH="10%"
|
||
ALIGN="right"
|
||
VALIGN="bottom"
|
||
><A
|
||
HREF="users-and-groups.html"
|
||
ACCESSKEY="N"
|
||
>Next</A
|
||
></TD
|
||
></TR
|
||
></TABLE
|
||
><HR
|
||
ALIGN="LEFT"
|
||
WIDTH="100%"></DIV
|
||
><DIV
|
||
CLASS="CHAPTER"
|
||
><H1
|
||
><A
|
||
NAME="MANAGING-USERS"
|
||
></A
|
||
>Chapter 10. Managing users</H1
|
||
><P
|
||
></P
|
||
><DIV
|
||
CLASS="VARIABLELIST"
|
||
><DL
|
||
><DT
|
||
>su username</DT
|
||
><DD
|
||
><P
|
||
>(Switch User), change to a different user. </P
|
||
><P
|
||
>Use <EM
|
||
>su -</EM
|
||
> to switch to root or<EM
|
||
> su username</EM
|
||
>, to switch to a different username. </P
|
||
><DIV
|
||
CLASS="TIP"
|
||
><P
|
||
></P
|
||
><TABLE
|
||
CLASS="TIP"
|
||
WIDTH="90%"
|
||
BORDER="0"
|
||
><TR
|
||
><TD
|
||
WIDTH="25"
|
||
ALIGN="CENTER"
|
||
VALIGN="TOP"
|
||
><IMG
|
||
SRC="../images/tip.gif"
|
||
HSPACE="5"
|
||
ALT="Tip"></TD
|
||
><TH
|
||
ALIGN="LEFT"
|
||
VALIGN="CENTER"
|
||
><B
|
||
>Using sudo</B
|
||
></TH
|
||
></TR
|
||
><TR
|
||
><TD
|
||
> </TD
|
||
><TD
|
||
ALIGN="LEFT"
|
||
VALIGN="TOP"
|
||
><P
|
||
> Its often considered better practice to use the <EM
|
||
>sudo </EM
|
||
>command rather than switch to the root user</P
|
||
><P
|
||
> The <EM
|
||
>sudo</EM
|
||
> command allows you to perform actions as root but logs the actions you take (so you can trace anything that was done to the system by yourself or others). <EM
|
||
>sudo</EM
|
||
> has a very good manual page which provides plenty of information about it.</P
|
||
><P
|
||
> You use sudo similar to how you execute a normal command with sudo prepended to it, for example:</P
|
||
><P
|
||
><TABLE
|
||
BORDER="1"
|
||
BGCOLOR="#E0E0E0"
|
||
WIDTH="90%"
|
||
><TR
|
||
><TD
|
||
><FONT
|
||
COLOR="#000000"
|
||
><PRE
|
||
CLASS="SCREEN"
|
||
> sudo rpm -U myrpm.i386.rpm </PRE
|
||
></FONT
|
||
></TD
|
||
></TR
|
||
></TABLE
|
||
></P
|
||
><P
|
||
> This would allow you to install a rpm even if you have the correct sudo access </P
|
||
></TD
|
||
></TR
|
||
></TABLE
|
||
></DIV
|
||
><P
|
||
>Note that if you want to return to your original user you don't use <EM
|
||
>su</EM
|
||
> again, type <EM
|
||
>exit</EM
|
||
> or press
|
||
<B
|
||
CLASS="KEYCAP"
|
||
>CTRL</B
|
||
>-<B
|
||
CLASS="KEYCAP"
|
||
>D</B
|
||
>
|
||
|
||
.</P
|
||
><P
|
||
>Simply typing <EM
|
||
>su</EM
|
||
> will give you some root privileges, but there are minor complications relating to environment variables. It's generally considered better practice to use <EM
|
||
>su - </EM
|
||
>because it has no restrictions.</P
|
||
><P
|
||
></P
|
||
></DD
|
||
><DT
|
||
>root</DT
|
||
><DD
|
||
><P
|
||
>The superuser. This user has power over everything and all, and can do anything with the system (including destroy it, and of course fix it :)). This user is used to perform most administration functions on the system.</P
|
||
></DD
|
||
></DL
|
||
></DIV
|
||
></DIV
|
||
><DIV
|
||
CLASS="NAVFOOTER"
|
||
><HR
|
||
ALIGN="LEFT"
|
||
WIDTH="100%"><TABLE
|
||
SUMMARY="Footer navigation table"
|
||
WIDTH="100%"
|
||
BORDER="0"
|
||
CELLPADDING="0"
|
||
CELLSPACING="0"
|
||
><TR
|
||
><TD
|
||
WIDTH="33%"
|
||
ALIGN="left"
|
||
VALIGN="top"
|
||
><A
|
||
HREF="controlling-services.html"
|
||
ACCESSKEY="P"
|
||
>Prev</A
|
||
></TD
|
||
><TD
|
||
WIDTH="34%"
|
||
ALIGN="center"
|
||
VALIGN="top"
|
||
><A
|
||
HREF="index.html"
|
||
ACCESSKEY="H"
|
||
>Home</A
|
||
></TD
|
||
><TD
|
||
WIDTH="33%"
|
||
ALIGN="right"
|
||
VALIGN="top"
|
||
><A
|
||
HREF="users-and-groups.html"
|
||
ACCESSKEY="N"
|
||
>Next</A
|
||
></TD
|
||
></TR
|
||
><TR
|
||
><TD
|
||
WIDTH="33%"
|
||
ALIGN="left"
|
||
VALIGN="top"
|
||
>Controlling services</TD
|
||
><TD
|
||
WIDTH="34%"
|
||
ALIGN="center"
|
||
VALIGN="top"
|
||
> </TD
|
||
><TD
|
||
WIDTH="33%"
|
||
ALIGN="right"
|
||
VALIGN="top"
|
||
>Users/Groups</TD
|
||
></TR
|
||
></TABLE
|
||
></DIV
|
||
></BODY
|
||
></HTML
|
||
> |