On a linux dedicated server which has DirectAdmin control panel on it, if you have couple of sites under your user account and you need to view the site without changing the DNS. You can view the default domain by the URL;

http://server-ip/~username/

But, if you have an addon domain and need to view the site without changing the DNS, you can set the addon domain to default and view it with the above URL. The other way is to set the IP and domain name in the hosts file in your windows system.

That’s it!

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One of our client needed sBNC to be installed on his dedicated server, here is how we helped him setup sBNC on his server.

Downloaded the source, kindly see below:

wget http://mirror.shroudbnc.info/sbnc-current.tar.gz
tar -zxf sbnc-current.tar.gz
cd sbnc-1.1
ls
./configure

Here we got an error of c++ compiler:

configure: error: C++ compiler cannot create executables

To fix this, you need to install c++ compiler on your system. I did it using yum:

yum install gcc-c++

After this is done, again giving the below command to install it:

./configure # without SSL-support
./configure --enable-ssl=yes # with SSL-support
make
make install

Now, if you need web interface, you will have to do this:

cd tickle
./configure
make
make install

Got errors while “make” , TCL was not installed on the server – you can install TCL on your dedicated server by doing this:

wget http://mesh.dl.sourceforge.net/sourceforge/tcl/tcl8.4.13-src.tar.gz
tar xfvz tcl8.4.13-src.tar.gz
cd tcl8.4.13/unix
./configure
make
make install

Then, you can proceed for the configuration by the conftool:

cd sbnc/sbnc
./conftool

Here, you can set the port number, username and password.

Start sbnc by:

./sbnc

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While working on a linux dedicated server without any control panel on it, the sendmail service starts very slow – it takes almost 7-10 minutes. While investigating the server, we checked the hostname and it was as below:

root# hostname
MarkSmith

we found that the hostname did not resolve, to get this fixed we used a valid domain which resolved to this server – so we changed the hostname of the server.

And, the sendmail responded very quickly and worked fine.

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For some reason when upcp completed on cPanel server rvskin started giving errors like below:

......................
.....................
main::cpanel_parse('GLOB(0x9c3af58)') called at cpanel.pl line 2912
main::doinclude('rvbranding/indexheader.html', 2) called at cpanel.pl line 1673
main::exectag('<cpanel relinclude="rvbranding/indexheader.html">') called at cpanel.pl line 4797
main::dotag(undef) called at cpanel.pl line 4664
......................................................
.....................................................

To get this fixed do the following:

root# mkdir /root/rvadmin

root# cd /root/rvadmin

root# rm -f rvauto.tar.bz2

root# wget http://download.rvglobalsoft.com/download.php/download/rvskin-auto/saveto/rvauto.tar.bz2

root# tar -xvjf rvauto.tar.bz2

root# perl /root/rvadmin/auto_rvskin.pl

This worked for us!

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If you looking to open remote desktop connection using console, do the following:

Open command prompt
Then, type: mstsc /console
This will start the remote desktop, type the computer IP to which you need to connect.
Configure the options and then click on connect.

To view all the options, in the console type: mstsc /?

That’s it!

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The chkconfig command can be used to activate and deactivate services. You use “chkconfig –list” to query a service in “/etc/rc.d”, that service’s settings for each runlevel are displayed. For example, the command “chkconfig –list httpd” returns the following output:

httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off

Viewing chkconfig Entries:

root@server# chkconfig –list | grep on

Modifying a chkconfig entry is almost as easy as listing the existing configuration. The form is:

chkconfig [--level <levels>] <name> <on|off|reset>

Runlevels (–level)

0. System halt
1. Single-user mode
2. Multiuser, without NFS
3. Complete multiuser mode
4. User defined
5. X11 (XDM login)
6. Reboot

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If you want to find large files and directories within your directory in linux here is the command:

du -sh /home/username/* | sort -nr | head

That’s it!

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Find is a wonderful command that is used in day to day. Some useful commands on find are as follows:

- To search the system for files that were modified within the last three days:

root@server# find / -mtime -3 -print

- List all files named core in the directory /test

root@server# find /test -name core

- To search the current directory and subdirectories for files beginning with name “conf” and prints the path:

root@server# find . -type f -name ‘conf*’ -print

To search in the current directory and all sub directories all files that contain the string “test” and will have their path printed to standard output.

root@server# find . -exec grep -q “test” ‘{}’ \; -print

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