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Suggest using `dd' to create the swapfile for diskless operation, with

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the required size, as opposed to simply `touch'ing it.  This works
around problems in the -current NFS and/or VFS and/or VM code.

Also hint about restricting the permissions to this file.
This commit is contained in:
Joerg Wunsch 1996-10-21 23:54:46 +00:00
parent e91cf4df93
commit 54223c4d83
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=19081
1 changed files with 13 additions and 5 deletions
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18
share/doc/handbook/diskless.sgml
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@ -1,4 +1,4 @@
<!-- $Id: diskless.sgml,v 1.5 1996/07/06 14:20:11 joerg Exp $ -->
<!-- $Id: diskless.sgml,v 1.6 1996/09/22 15:40:11 wosch Exp $ -->
<!-- The FreeBSD Documentation Project -->
<sect><heading>Diskless operation<label id="diskless"></heading>
@ -102,13 +102,21 @@ hostname myclient.mydomain
<item>If you are swapping over NFS (completely diskless
configuration) create a swap file for your client
using touch. If your <tt>swapfs</tt> command has the
argument <tt>/swapfs</tt> as in the example above,
the swapfile for myclient will be called
using <tt>dd</tt>. If your <tt>swapfs</tt> command has the
arguments <tt>/swapfs</tt> and the size 20000 as in the
example above, the swapfile for myclient will be called
<tt>/swapfs/swap.X.X.X.X</tt> where <tt>X.X.X.X</tt>
is the client's IP addr, eg:
<tscreen><verb>
# touch /swapfs/swap.192.1.2.4
# dd if=/dev/zero of=/swapfs/swap.192.1.2.4 bs=1k count=20000
</verb></tscreen>
Also, the client's swap space might contain sensitive
information once swapping starts, so make sure to
restrict read and write access to this file to prevent
unauthorized access:
<tscreen><verb>
# chmod 0600 /swapfs/swap.192.1.2.4
</verb></tscreen>
<item> Unpack the root filesystem in the directory the