How to mount NFS volume at Boot time in Linux?

It seems very basic thing - however, coming from Solaris background, it was always a puzzle why Linux was not able to mount my NFS volumes the way it was mounting in Solaris. Basically, the only difference is "_netdev" keyword - which tells Linux that this device should be mounted AFTER network services are UP. To work around this, I even used a custom run-control script at /etc/rc3.d to mount it later. Now that I found "_netdev" keyword - I know that I am never going to use any workarounds for my NFS volumes. :)

[root@snet102 ~]# cat /etc/fstab
#
# /etc/fstab
# Created by anaconda on Tue Nov 13 14:06:32 2012
#
# Accessible filesystems, by reference, are maintained under '/dev/disk'
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
#
/dev/mapper/vg_rl6u3vanilla-lv_root /                       ext4    defaults        1 1
UUID=2309506a-eed6-413e-b234-0587949c3504 /boot                   ext4    defaults        1 2
/dev/mapper/vg_rl6u3vanilla-lv_swap swap                    swap    defaults        0 0
tmpfs                   /dev/shm                tmpfs   defaults        0 0
devpts                  /dev/pts                devpts  gid=5,mode=620  0 0
sysfs                   /sys                    sysfs   defaults        0 0
proc                    /proc                   proc    defaults        0 0
##
client10:/iscsi1/nfsdata  /nfstest2             nfs     _netdev         0 0
##


[root@snet102 ~]# df -hFnfs
Filesystem            Size  Used Avail Use% Mounted on
client10:/iscsi1/nfsdata
                      2.0G   37M  1.9G   2% /nfstest2

How to configure VNC on Redhat Linux 6?

I was trying to configure VNC on my RHEL6U1 test machine using my old method of editing /etc/xinetd/vncservers file when I came across the difference between RHEL6 and previous versions of RHEL. In RHEL6, the VNC Server configuration is rather easy than previous versions of Linux. Here is what I had to do:

# cat /etc/sysconfig/vncservers 
# The VNCSERVERS variable is a list of display:user pairs.
#
# Uncomment the lines below to start a VNC server on display :2
# as my 'myusername' (adjust this to your own).  You will also
# need to set a VNC password; run 'man vncpasswd' to see how
# to do that.  
#
# DO NOT RUN THIS SERVICE if your local area network is
# untrusted!  For a secure way of using VNC, see this URL:
# http://kbase.redhat.com/faq/docs/DOC-7028

# Use "-nolisten tcp" to prevent X connections to your VNC server via TCP.

# Use "-localhost" to prevent remote VNC clients connecting except when
# doing so through a secure tunnel.  See the "-via" option in the
# `man vncviewer' manual page.

# VNCSERVERS="2:myusername"
# VNCSERVERARGS[2]="-geometry 800x600 -nolisten tcp -localhost"

VNCSERVERS="2:root"
VNCSERVERARGS[2]="-geometry 1680x1050 -depth 24"


# cat /etc/sysconfig/iptables 
# Firewall configuration written by system-config-firewall
# Manual customization of this file is not recommended.
*filter
:INPUT ACCEPT [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
-A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
-A INPUT -p icmp -j ACCEPT
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 22 -j ACCEPT
-A INPUT -m state --state NEW -m tcp -p tcp --dport 5902 -j ACCEPT
-A INPUT -m state --state NEW -m udp -p udp --dport 5902 -j ACCEPT
-A INPUT -j REJECT --reject-with icmp-host-prohibited
-A FORWARD -j REJECT --reject-with icmp-host-prohibited
COMMIT