add HISTORY to various man pages

[plan9front.git] / sys / man / 1 / ps

diff --git a/sys/man/1/ps b/sys/man/1/ps
index 5d1c86b1fb0c80ec5fe061c5ef0ce838b2b0d08a..13d2919f98322f05c1bcfc0816228ed330f44605 100644 (file)
--- a/sys/man/1/ps
+++ b/sys/man/1/ps
@@ -109,7 +109,10 @@ flag causes
 to print the arguments for the process.  Newlines in arguments will be translated to spaces for display.
 .PP
 .I Pstree
-shows the processes as a tree.
+prints the processes as a tree in a two colum layout where
+the first colum being the process id and second column
+the program name and arguments indented and prefixed with
+line drawing runes to reflect the nesting in the hierarchy.
 .SH FILES
 .B /proc/*/status
 .SH SOURCE
@@ -124,3 +127,6 @@ shows the processes as a tree.
 .IR kill (1), 
 .IR ns (1),
 .IR proc (3)
+.SH HISTORY
+.I Pstree
+first appeared in 9front (June, 2011).