VNC server configuration is pretty straight forward in redhat. Here are the steps that you should complete in order to run a functional VNC server in a few minutes.
Our test user is : mert
1) Adjust /etc/sysconfig/vncservers config file as below:
VNCSERVERS=”2:mert”
2) Login to mert account and set vncpassword
[root@rh54-3 sysconfig]# su – mert
[mert@rh54-3 ~]$ vncpasswd
Password:
Verify:
[mert@rh54-3 ~]$
3) Start [...]
I hadn’t used screen much in the past but I see that it is a very handy tool. I just would like to add some tips about screen command.
Ctrl-a c : creates a new screen shell
Ctrl-a TAB: switches focues between upper and lower split terminal
Ctrl-a “ : Display a list of managed windows. (This is [...]
As network cards or links may fail, we may solve this problem by creating multiple links to our network devices. One way is interface bonding which we will configure one in our example. I assume that your linux have three interfaces eth0,eth1 and eth2. We will use two of the interfaces;
Slave Interfaces : eth1 and [...]
You can find quite a lot of files in /etc/sysconfig however in configuring them you may have trouble but there is a file that you can use to understand what attributes you can use for each file. It is sysconfig.txt. In my current Redhat 5.4 system the file is at the following location as it [...]
One day you may have to install an RPM file into a different root folder. For example under rescue mode though you can chroot as an option. Here is the handy option for you to do it.
#rpm -ivh zip-2.31-2.el5.i386.rpm –root /mnt/sysimage
In the event that partition table is corrupted or boot loader has gone, here are some steps that you can take in order to boot the system as normal.
I hope that you have taken the backup of partition table previously with the command;
#sfdisk -d /dev/sda > /root/sda_partition_table.out
Or if you also want to backup the whole [...]
One day it may happen to you that either MBR is corrupted or partition table has gone then you will need rescue mode. However there is one problem, what if you use LVM in your system. Because redhat does everything for us we don’t actually know what it does for initialization unless you have looked [...]
As SELinux is a bit of complicated compared to the tools that we use currently, I have thought it is good to have some tips here.
1) seinfo: This is the selinux query tool to see statistics about your policy.
[root@rh54-3 ~]# seinfo
Statistics for policy file: /etc/selinux/targeted/policy/policy.21
Policy Version & Type: v.21 (binary, MLS)
Classes: 61 Permissions: 220
Types: [...]
If you want to disable only local login for normal users you can use the file /etc/security/access.conf for this purpose however it doesn’t work by default even if you configure this file properly. For example, if you want to allow root logins locally but not any other user, edit access.conf file such that;
-:ALL EXCEPT root:ALL
Literally [...]
When I install Gentoo, as far as I remember, by default normal users aren’t allowed to use “su” . If you want to let any user to use “su” then you have to add them into the “wheel” user group. In redhat, you can uncomment one line, and it works like a charm.
Edit the file [...]