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Full Discussion: what is the difference between /etc/mnttab and /etc/vfstab
Operating Systems Solaris what is the difference between /etc/mnttab and /etc/vfstab Post 302529398 by Perderabo on Thursday 9th of June 2011 09:09:39 AM
Old 06-09-2011
On Solaris 10 at least, /etc/mnttab is now a separate filesystem unto itself. This allows the kernel to ensure that it is never out of date.

Code:
$ uname -a
SunOS geo-support1 5.10 Generic_127111-10 sun4u sparc SUNW,Sun-Blade-1000
$ df -k /etc/mnttab
Filesystem            kbytes    used   avail capacity  Mounted on
mnttab                     0       0       0     0%    /etc/mnttab
$

You can list the contents of /etc/mnttab by issuing "mount" with no arguments. Note that /etc/mnttab is included...
Code:
$
$ mount
/ on /dev/dsk/c1t1d0s0 read/write/setuid/devices/intr/largefiles/logging/xattr/onerror=panic/dev=1d80008 on Sat Apr 16 17:18:49 2011
/devices on /devices read/write/setuid/devices/dev=4e00000 on Sat Apr 16 17:18:34 2011
/system/contract on ctfs read/write/setuid/devices/dev=4e40001 on Sat Apr 16 17:18:34 2011
/proc on proc read/write/setuid/devices/dev=4e80000 on Sat Apr 16 17:18:34 2011
/etc/mnttab on mnttab read/write/setuid/devices/dev=4ec0001 on Sat Apr 16 17:18:34 2011
/etc/svc/volatile on swap read/write/setuid/devices/xattr/dev=4f00001 on Sat Apr 16 17:18:34 2011
/system/object on objfs read/write/setuid/devices/dev=4f40001 on Sat Apr 16 17:18:34 2011
/platform/sun4u-us3/lib/libc_psr.so.1 on /platform/sun4u-us3/lib/libc_psr/libc_psr_hwcap1.so.1 read/write/setuid/devices/dev=1d80008 on Sat Apr 16 17:18:43 2011
/platform/sun4u-us3/lib/sparcv9/libc_psr.so.1 on /platform/sun4u-us3/lib/sparcv9/libc_psr/libc_psr_hwcap1.so.1 read/write/setuid/devices/dev=1d80008 on Sat Apr 16 17:18:45 2011
/dev/fd on fd read/write/setuid/devices/dev=5100001 on Sat Apr 16 17:18:49 2011
/tmp on swap read/write/setuid/devices/xattr/dev=4f00002 on Sat Apr 16 17:18:52 2011
/var/run on swap read/write/setuid/devices/xattr/dev=4f00003 on Sat Apr 16 17:18:52 2011
/project on /dev/dsk/c1t1d0s4 read/write/setuid/devices/intr/largefiles/logging/xattr/onerror=panic/dev=1d8000c on Sat Apr 16 17:19:01 2011
/export/home on /dev/dsk/c1t1d0s3 read/write/setuid/devices/intr/largefiles/logging/xattr/onerror=panic/dev=1d8000b on Sat Apr 16 17:19:02 2011
$

 

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LEARN ABOUT LINUX

sysmsg

sysmsg(7D)							      Devices								sysmsg(7D)

NAME

       sysmsg - system message routing to console devices

SYNOPSIS

       /dev/sysmsg

DESCRIPTION

       The  file  /dev/sysmsg routes output to a variable set of console devices.  Writes to /dev/sysmsg are always directed to the system console
       /dev/console, and are in addition directed to a set of auxiliary console devices managed by consadm(1M).

       Only root has permission to write to this device.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsr			   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Stable			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       consadm(1M), syslogd(1M) , attributes(5), console(7D)

SunOS 5.10							    13 Oct 1998 							sysmsg(7D)
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