.if n .pH rn4.chap9 @(#)chap9	40.35
.\" Copyright 1989 AT&T
.BK "Software notes"
.CH "Miscellaneous" "9"
.H 1 "Miscellaneous Notes"
.H 2 "Commands"
.H 3 \f4rsh\f1
.IX \f4rsh\fP(1)
The old restricted shell \f4rsh\f1 is no longer 
located in the same directory as the Bourne shell \f4sh\f1.  
This is due to the addition of the \f4/usr/bin/rsh\f1 (remote shell) 
command. The old \f4rsh\f1 is located in \f4/usr/lib/rsh\f1.
.H 3 "\f4pwck\f1"
.IX \f4pwck\fP(1M)
\f4pwck\f1 only knows about \f4/etc/passwd\f1, 
and not \f4/etc/shadow\f1.
.H 3 \f4nice\f1
.IX \f4nice\fP(1)
The \f4nice\f1(1) command does not reference the $SHELL environment
variable when forking a process. Any command that is supplied
on the \f4nice\f1 command line is executed by \f4/usr/bin/sh\f1.
Any command not supported by \f4/usr/bin/sh\f1 fails.
.H 3  \f4/dev/syscon\f1
.IX \f4/dev\fP, \f4syscon\fP
Changing \f4/dev/syscon\f1 to a terminal other 
than \f4/dev/console\f1
is not recommended. If \f4/dev/syscon\f1 
remains linked to a tty port
across a reboot, the system may not be bootable to any run
level. This is due to the fact that tty ports are not
pumped until entering multi-user mode. The virtual system
console must be available earlier.
.H 3 "Limit for File Descriptors"
.IX files, descriptor limits
In SVR4.0, a default soft limit of 24 is imposed on the 
number of open file descriptors allowed per process. This is increased
from 20 in Release 3.2. Writing software that requires
more than 24 descriptors per process is discouraged. 
It is possible with appropriate privileges to increase the soft 
limit for programs that require more open files(See
\f2Prgrammer's Reference Manual\f1, \f4getrlimit\f1(2),
\f4setrlimit\f1(2).
