mirror of
https://github.com/Zeckmathederg/glfs.git
synced 2025-01-27 09:42:12 +08:00
ca3bcd405f
git-svn-id: svn://svn.linuxfromscratch.org/BLFS/trunk/BOOK@55 af4574ff-66df-0310-9fd7-8a98e5e911e0
40 lines
1.5 KiB
XML
40 lines
1.5 KiB
XML
<sect1 id="which" xreflabel="which-&which-version;">
|
|
<?dbhtml filename="which.html" dir="general"?>
|
|
<title>which-&which-version; and alternatives</title>
|
|
|
|
<para>The presence / absence of the which program in the main LFS book
|
|
is probably one of the most contentious issues we have on the mailing
|
|
lists. It has resulted in at least one flame war in the recent past.
|
|
To hopefully put an end to this once and for all, we here present the
|
|
various options for equipping your system with "which".</para>
|
|
|
|
<para>The first option is simply to use a bash alias:</para>
|
|
<screen>alias which='type -p'</screen>
|
|
<para>This command can be put in your
|
|
<filename>~/.bash_profile</filename> or <filename>~/.bashrc</filename>
|
|
file in order to be set up each time you log in (see man bash for more
|
|
information on the bash login files). This will not always work
|
|
however, for example it will fail when a program needs to use "which"
|
|
but
|
|
doesn't spawn a shell.</para>
|
|
|
|
<para>The second option is to create a simple script:</para>
|
|
<para><screen><userinput>cat > /usr/bin/which << "EOF"</userinput>
|
|
#!/bin/bash
|
|
type -p "$@"
|
|
<userinput>EOF
|
|
chmod 755 /usr/bin/which
|
|
chown root:root /usr/bin/which</userinput></screen></para>
|
|
<para>This should generally work OK and is probably the easiest solution
|
|
for boxes which don't need a good user environment to work in.</para>
|
|
|
|
<para>The third option is to install the actual program
|
|
<emphasis>which</emphasis>.</para>
|
|
|
|
&which-intro;
|
|
&which-inst;
|
|
&which-desc;
|
|
|
|
</sect1>
|
|
|