add unshare.1, swapon.8, swapoff.8 and update df.1

df.1

@@ -9,7 +9,8 @@ If no arguments are given, df shows all the file systems using 512-byte
 blocks.
 .SH OPTIONS
 .TP
-\fB-a\fR Show all file systems including dummy ones.
+\fB-a\fR Show all file systems including dummy ones. This is the default
+option.
 .TP
 \fB-h\fR Not implemented.
 .TP

swapoff.8

@@ -0,0 +1,11 @@
+.TH SWAPOFF 8 ubase-VERSION
+.SH NAME
+\fBswapoff\fR - disable devices and files for paging and swapping
+.SH SYNOPSIS
+\fBswapoff\fR [\fB-a\fI device\fR]
+.SH DESCRIPTION
+\fBswapoff\fR disables swapping on the specified devices and files.
+.SH OPTIONS
+.TP
+\fB-a\fR
+Disable swapping on all known swap devices and files as found in /etc/fstab.

swapon.8

@@ -0,0 +1,19 @@
+.TH SWAPON 8 ubase-VERSION
+.SH NAME
+\fBswapon\fR - enable devices and files for paging and swapping
+.SH SYNOPSIS
+\fBswapon\fR [\fB-dp\fR] [\fB-a\fI device\fR]
+.SH DESCRIPTION
+\fBswapon\fR is used to specify devices on which paging and
+swapping are to take place.
+.SH OPTIONS
+.TP
+\fB-d\fR
+Discard freed swap pages before they are reused.
+.TP
+\fB-p\fR
+Set higher priority than the default to the new swap area.
+.TP
+\fB-a\fR
+Make all devices marked as ``swap'' in /etc/fstab are made
+available, except for those with the ``noauto'' option.

unshare.1

@@ -0,0 +1,36 @@
+.TH UNSHARE 1 ubase-VERSION
+.SH NAME
+\fBunshare\fR - run program with some namespaces unshared from parent
+.SH SYNOPSIS
+\fBunshare\fR [\fB-muinpU\fR] cmd [\fIargs...\fR]
+.SH DESCRIPTION
+\fBunshare\fR
+Unshares the indicated namespaces from the parent process
+and then executes the specified program. The namespaces to be unshared are
+indicated via options.
+.SH OPTIONS
+.TP
+\fB-m\fR
+Unshare the mount namespace, so that the calling process has a private
+copy of its namespace which is not shared with any other process.
+.TP
+\fB-u\fR
+Unshare the UTS IPC namespace, so that the calling process has a
+private copy of the UTS namespace which is not shared with any other
+process.
+.TP
+\fB-i\fR
+Unshare the System V IPC namespace, so that the calling process has a
+private copy of the System V IPC namespace which is not shared with
+any other process.
+.TP
+\fB-n\fR
+Unshare the network namespace, so that the calling process is moved
+into a new network namespace which is not shared with any previously
+existing process.
+.TP
+\fB-p\fR
+Create the process in a new PID namespace.
+.TP
+\fB-U\fR
+The process will have a distinct set of UIDs, GIDs and capabilities.