Archive for the ‘Uncategorized’ Category

Change upload size in phpMyAdmin ( Cpanel )

Friday, April 10th, 2009

Change the post_max_size value to your choice in the file /usr/local/cpanel/3rdparty/etc/phpmyadmin/php.ini which is the php.ini for phpMyAdmin and restart Cpanel. 

Difference between AddType and AddHandler

Monday, April 6th, 2009

AddType handler specifies how the client (eg:- browser) has to deal with a particular data stream . The AddHandler on the other hand maps a handler to the file extension telling the server what to do with it.
AddType application/x-httpd-php4 .php4
AddHandler application/x-httpd-php4 .php4
The above two  lines looks similar except for the difference in AddType and AddHandler [...]

CPUUNITS value in VPS

Saturday, April 4th, 2009

cpuunits is not dependent on RAM or vice versa . Normal allocation is 5000 pcs
CPUUNITS=”5000″
Analysis of a vps
———————–
vzcpucheck
Current CPU utilization: 227090
Power of the node: 781118
What this says is that node has 781000~ cpuunits available with the processors which it has there. What your host should do, is figure out how many VPSs your host is [...]

Quota problem on VPS

Saturday, April 4th, 2009

Scenario:- edquota: Can’t write quota for 32063 on /dev/vzfs: No such process
Resetting quota for <user> to 0 Meg….Done
This is used for tracking quota for all your files in the system. The more files you have in your system, the more quotaugidlimit is required . quotaugidlimit is used to track the numer of group and users [...]

Add exim interface IP

Saturday, April 4th, 2009

Consider your mail server IP got blocked in many spam databases and instead of waiting for the spam database authorities to remove it ( while you have given the IP unblock request ) you can change the mail server IP which exim uses so that email traffic is open again. We can use the “interface” [...]

Horde Session Handler error

Saturday, April 4th, 2009

Error:- Can’t find file: ‘horde_sessionhandler.MYI’
If you get this error, you’ve most likely done a file-based MySQL backup restore, and the InnoDB files are not present. The horde_sessionhandler table is an InnoDB table but not a MyISAM.
To fix this first you will need to stop mysql
# /etc/init.d/mysqld stop
Then remove the innoDB table
# rm /var/lib/mysql/horde/horde_sessionhandler.frm
Then start MySQL
# [...]

SSH password-less login

Monday, March 30th, 2009

To enable password-less login using SSH to any linux server do the following. It requires you generate your own personal set of private/public key pair. Consider you have two linux machines HostA & HostB. I am trying to configure password-less login from HostA to HostB
root@HostA # ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in [...]

Enable ftp on plesk

Monday, March 30th, 2009

To enable FTP on Plesk you will need to login to the server using a shell and do the following:-
First check whether ftp is running in the server using “ps” and then check the status using
>>chkconfig ftp_psa status
Now to turn on FTP
>>chkconfig ftp_psa on
and similarly if you want to turn OFF FTP
>>chkconfig ftp_psa off
The FTP [...]

Time Zone

Monday, March 30th, 2009

How to echo the time in a specified zone ?
Use the command zdump, which is called the time zone dumper
for eg :-
linuxcom:~ # zdump EST
EST  Mon Mar 30 06:31:21 2009 EST
linuxcom:~ # zdump IST
IST  Mon Mar 30 11:31:38 2009 GMT
Check out the man page for the same for more options.
And if you want to change [...]

sudo requiretty error

Friday, October 10th, 2008

I got the following error in configuring an exim mailqueue checking nrpe command
===================
/usr/local/nagios/libexec/check_nrpe -H <ip>  -c check_eximmailqueue
must have a tty to run sudo
===================
This is actually not an error.But a setting in sudo configuration that sets a tty requirement for doing a sudo.
And the error condition is caused because the check command is trying to do [...]